Applied Science of Pharmacy Final Exam Calculations (All Topics)

Fluids Water flows through a pipe of diameter 8.0 cm with a speed of 10.0 m/s. It then enters a smaller pipe of diameter 3.0 cm. What is the speed of the water as it flows through the smaller pipe? Select one: a. 71 m/s b. 1.4 m/s c. 27 m/s d. 54 m/s e. 2.8 m/s

a. 71 m/s

PDI F-18 Fluorodeoxyglucose (F-18 FDG) decays by positron emission to produce two 511 keV photons ~180 degrees apart. What is the wavelength (λ), in nanometers, of the 511 keV photons? Select one: a. 0.00243 nm b. 0.00124 nm c. 0.00142 nm d. 0.0089 nm e. 0.00511 nm

a. 0.00243 nm

Light The outside mirror on the passenger side of a car is convex and has a radius of 14.0 m. Relative to this mirror, a truck traveling in the rear has an object distance of 11.0 m. Determine the image distance of the truck and the magnification of the mirror. Select one: a. -4.28 m +0.389 b. +4.28 m -0.389 c. +19.3 m -1.75 d. +51.3 m -4.67 e. -51.3 m +4.67

a. -4.28 m +0.389

PDI In-111 emits photons during decay including one photon of 171.3 keV and another photon of 245.4 keV. What is the wavelength of the 245.4 keV photon? E = hc / λ E(keV) = 1.24 / λ(nm) c = 3 x 108 m/s h = 4.136 x 10-15 eV.s Select one: a. 0.005 nm b. 0.0012 nm c. 0.007 nm d. 0.0035 nm e. 0.08 nm

a. 0.005 nm

Magnetism Take x and y axis in the plane of the page with +x to the right and +y up. Take z perpendicular to the plane of the page with +z coming out of the page (toward you). An electron enters a magnetic field. The velocity of the electron as it enters the field is 2.55 m/s in the -y direction. The magnetic field has a magnitude of 0.455 T and points in the -x direction. What is the magnetic force exerted on the electron by the magnetic field? Select one: a. 1.16 N direction: +x axis b. 1.86 x 10-19 N direction: -z axis c. 1.86 T direction: -x axis d. 1.86 x 10-19 N direction: +z axis e. 1.86 x 10-19 N direction: +y axis

a. 1.16 N direction: +x axis

Biol/Tox If the HVL for 99mTc is 0.17 mm, how much lead is necessary to reduce exposure by essentially 100% Select one: a. 1.2 mm b. 4.8 mm c. 9.1 mm d. 1.25 cm e. 3.25 cm

a. 1.2 mm

Fluids The density of ice is 0.92 g/cm3; and the density of seawater is 1.03 g/cm3. A large iceberg floats in Arctic waters. What fraction of the volume of the iceberg is exposed? Hint: In other words, what fraction of the volume of the iceberg is above the water? Select one: a. 11 % b. 92 % c. 89 % d. 99 % e. 0.080 %

a. 11 %

Magnetism Take x and y axis in the plane of the page with +x to the right and +y up. Take z perpendicular to the plane of the page with +z coming out of the page (toward you). Consider a long straight current-carrying wire in magnetic field. The current is 5.00 A in the +z direction. The magnetic field has a magnitude of 0.325 T and points in the +y direction. The length of the wire in magnetic field is 7.30 m. The length of the wire outside of the magnetic field region is 2.70 m. What is the magnetic force exerted on the wire by the magnetic field? Select one: a. 11.9 N direction -x b. 11.9 N direction +y c. 16.3 N direction +x d. 4.39 N direction -y e. 11.9 N direction -z

a. 11.9 N direction -x

Fluids In a car lift, compressed air with a gauge pressure of 4.0 × 10^5 Pa is used to raise a piston with a circular cross-sectional area. If the radius of the piston is 0.17 m, what is the maximum mass that can be raised using this piston? Hint: p1=p2 and p2=force/area=weight/area=mg/area therefore 4.0 × 105 Pa=mg/area. Solve for m. Note that the gauge pressure on the input piston is in excess of the atmospheric pressure. Also the weight on the output piston is in addition to the force due to the atmospheric pressure. There is no need to add 1 atm to the gauge pressure as the atmospheric pressure acts on both input and output pistons. Select one: a. 3,700 kg b. 22,000 kg c. 9,800 kg d. 530 kg e. 41,000 kg

a. 3,700 kg

Electricity A circuit contains a resistor in series with a capacitor, the series combination being connected across the terminals of a battery. The time constant for charging the capacitor is 1.5 s when the resistor has a resistance of 2.40 x 104 Ohms. What would the time constant be if the resistance has a value of 5.20 x 104 Ohms? Select one: a. 3.25 s b. 1.87 x 109 s c. 2.17 s d. 18.7 s e. 1.50 s

a. 3.25 s

PDI A patient was scheduled for a thallous (Tl-201) chloride myocardial perfusion study at 10 a.m. Tuesday. A 4.2 mCi dose was delivered to the facility as requested, but the procedure was delayed due to a camera malfunction. The appointment was rescheduled for 10 a.m. on Wednesday. How much activity will remain after the delay? The half-life for Tl-201 is 73.1 hours. see decay tables or use Select one: a. 3.35 mCi b. 4.94 mCi c. 2.19 mCi d. 0.85 mCi

a. 3.35 mCi

Electricity The electric field at a certain point P is 2.00 N/C up. Determine the electric force on a charge placed at that location, if the charge has a value of +1.80 x 10-7 C. Select one: a. 3.60 x10-7 N up b. 1.11 N up c. 9.00 x 10-8 N down d. 1.11 x 107 N up e. 1.11 x 107 N down

a. 3.60 x10-7 N up

PDI How many disintegrations per second (dps) are contained in 1 microcurie of radioactivity? Select one: a. 3.7 x 104 dps b. 2.7 x 105 dps c. 7.4 x 106 dps d. 1.8 x 103 dps

a. 3.7 x 104 dps

Light A submerged diver shines a light toward the surface of a body of water at angles of incidence of 44 ° and 54 °. Can a person on the shore see a beam of light emerging from the surface in either case? Draw picture(s). Select one: a. 44 ° - Yes 54 ° - No b. 44 ° - Yes 54 ° - Yes c. 44 ° - No 54 ° - No d. 44 ° - No 54 ° - Yes e. It cannot be determined from the information given.

a. 44 ° - Yes 54 ° - No

Light Take the index of refraction of water to be 1.33. Calculate the critical angle for the water to air interface. Also calculate the critical angle for the air to water interface. Select one: a. 48.8 ° does not exist b. 24.4 ° does not exist c. does not exist 48.8 ° d. does not exist does not exist e. 11.9 ° 11.9 °

a. 48.8 ° does not exist

Thermodynamics The peak emission wavelength of the Sun (with effective surface temperature of 5780 K) is Select one: a. 502 nm b. 507 nm c. 9.45 x 10-6 m d. 2.9 x 10-3 m.K e. 527 nm

a. 502 nm

Sound When one person shouts at a football game, the sound intensity level at the center of the field is 60.0 dB. When all the people shout together, the intensity level increases to 109 dB. Assuming that each person generates the same sound intensity at the center of the field, how many people are at the game? Select one: a. 7.94 x 104 b. 49 c. 8.00 x 103 d. 4.90 x 105 e. 1.00 x 103

a. 7.94 x 104

Thermodynamics Consider a person with a core temperature of 37.0 degrees Celsius and a skin temperature of 34.0 degrees Celsius. The person's tissue is modeled as providing an insulating layer of thickness 1.00 cm, surface area 1.20 m2, and thermal conductivity 0.200 Wm-1K-1. What is the rate of heat loss by conduction through the person's tissue? Select one: a. 72.0 W b. 8.88 W c. 240 W d. 0.72 W e. 888 W

a. 72.0 W

Fluids A large tank is filled with water to a depth of 15 m. A spout located 5.00 m below the surface of water in the tank is then opened. With what speed will water emerge from the spout? Assume that the tank is open to the air at the top. Use the equation of continuity and Bernoulli's equation. Select one: a. 9.9 m/s b. 3.1 m/s c. 31 m/s d. 17 m/s e. 14 m/s

a. 9.9 m/s

Thermodynamics A 50.0-kg person has a core temperature of 37.0 °C. The onset of mild hypothermia occurs at a core body temperature of about 35 °C. The specific heat of the human tissue is 3500 J/kg K. He is losing heat at a rate of 300 W to his surroundings, and he will be exposed to this environment for four hours. Will he get hypothermia if he is walking? What is his core body temperature after four hours? Sitting still metabolic rate = 100W; walking metabolic rate = 250 W; running metabolic rate = 600 W. Select one: a. walking: hypothermic 32.9 °C b. walking: not hypothermic 35.3 °C c. walking: not hypothermic 41.1 °C d. walking: hypothermic 4.11 °C e. walking: not hypothermic 37.0 °C

a. walking: hypothermic 32.9 °C

Electricity Show that the magnitude of the electric field due to a point charge q at a point P located at a distance r from the charge q is E=kIqI/r2 by starting at the general definition for electric field and then using Coulomb's law. Using the equation above, solve the following problem. At a distance r1 from a point charge, the magnitude of the electric field created by the charge is 148 N/C. At a distance r2 from the charge, the field has a magnitude of 432 N/C. Find the ratio r2/r1. Select one: a. 0.343 b. 0.585 c. 1.88 d. 1.37 e. 1.71

b. 0.585

Electricity Consider two parallel plates with charges of equal magnitude and opposite sign. An electron is released from rest at the negative plate. The charge per unit area on each plate is 1.80 x 10-7 C/m2, and the plate separation is 1.50 cm. How fast is the electron moving just before it reaches the positive plate? Hint: Note that, for parallel plates, the magnitude of the electric field between the plates is: E=σ/ε0=q/(ε0A) where σ is the charge per unit area, q is the magnitude of the charge on the plates, A is the area of one plate. Determine the electric field magnitude from the charge per unit area. Then use the relationship between the voltage and electric field for parallel plates, electron acceleration equation, and kinetic energy definition. Select one: a. 4.88 x 10-17 J b. 1.03 x 107 m/s c. 2.03 x 104 m/s d. 1.03 x 108 m/s e. none of the above

b. 1.03 x 107 m/s

Magnetism Take x and y axis in the plane of the page with +x to the right and +y up. Take z perpendicular to the plane of the page with +z coming out of the page (toward you). Consider a long straight wire that carries a 15.0-A current in the -x direction. Determine the magnetic field at a point P 0.250 m directly below the wire Select one: a. 1.20 x 10-5 T direction -y b. 1.20 x 10-5 T direction +z c. 120 T direction -z d. 3.77 x 10-5 N direction +z e. 7.54 x 10-5 T direction +x

b. 1.20 x 10-5 T direction +z

Electricity What is the electric field at point P, if a charge equal to +3.00 x 10-8 C placed at that location experiences an electric force of 6.00 x 10-8 N to the left? Select one: a. 0.500 N/C to the right b. 2.00 N/C to the left c. 2.00 N/C to the right d. 1.80 x 10-15 N/C to the left e. 0.500 N/C to the left

b. 2.00 N/C to the left

PDI An In-111 oxine (t1/2 = 67.2 hours) supplier calibrates each mL of solution at 4.17 mCi for 12:00 p.m. on Friday with a one-week expiration date. The product is shipped to facilities for receipt every Friday, where the material is stored until use. How much activity remains at 9:00 a.m. Monday in the 1 mL vial of In-111 oxine when the pharmacist needs to use In‑111 oxine to label a patient's white blood cells (WBCs) for use in a nuclear medicine study attempting to identifying the location of the patient's infection? see decay tables or use Select one: a. 3.36 mCi / 1 mL b. 2.05 mCi / 1 mL c. 2.62 mCi / 1 mL d. 1.84 mCi / 1 mL e. 6.22 mCi / 1 mL

b. 2.05 mCi / 1 mL

Bioelectricity An axon is the relatively long tail-like part of a neuron, or nerve cell. The outer surface of the axon membrane is charged positively, and the inner surface is charged negatively. Thus, the membrane is a kind of capacitor. Assuming that the membrane acts like a parallel plate capacitor with a plate area of 5.00 x 10-6 m2, dielectric constant of 5.00 and thickness of 1.00 x 10-8 m, what is its capacitance? Select one: a. 11.1 x 10-14 F b. 2.21 x 10-8 F c. 4.43 x 10-9 F d. 2.50 x 103 F

b. 2.21 x 10-8 F

Fluids The surface of the water in a storage tank is 25.0 m above a water faucet in the kitchen of a house. In other words, the head of water is 25.0 m at the faucet. Calculate the difference in water pressure between the faucet and the surface of the water in the tank. Where is the pressure greater, at the faucet, or at the surface of the water? Select one: a. 2.94 x 105 Pa faucet b. 2.45 x105 Pa faucet c. 30.0 Pa faucet d. 1.013 x 105 Pa surface of the water e. 136 Pa surface of the water

b. 2.45 x105 Pa faucet

Sound As your dog is running directly away from you at a speed of 9.00 m/s, you blow an ultrasonic whistle that emits a sound of frequency 27.5 kHz. Assume that you are stationary while you blow the whistle. Take the speed of sound in air to be 343 m/s. What is the frequency of the sound perceived by the dog? Select one: a. 703 Hz b. 26.8 kHz c. 28.2 kHz d. 29.0 kHz e. 1021 kHz

b. 26.8 kHz

Light A person on the shore shines a light toward the surface of a body of water at angles of incidence of 30 ° and 60 °. Can a submerged diver see a beam of light transmitted into water in either case? Draw picture(s). Select one: a. 30 ° - Yes 60 ° - No b. 30 ° - Yes 60 ° - Yes c. 30 ° - No 60 ° - No d. 30 ° - No 60 ° - Yes e. It cannot be determined from the information given.

b. 30 ° - Yes 60 ° - Yes

Electricity The electronic flash attachment for a camera contains a capacitor for storing the energy used to produce the flash. In one such unit, the potential difference between the plates of an 850 micro-Farad capacitor is 280 V. Determine the energy that is used to produce the flash in this unit. Assuming that the flash lasts for 3.90 ms, find the effective power or "wattage" of the flash. Select one: a. 33.3 J 0.130 W b. 33.3 J 8.54 x 103 W c. 3.33 x 107 J 8.54 x 106 W d. 3.33 x 107 J 8.54 x 109 W e. 1.19 x 10-3 J 0.305 W

b. 33.3 J 8.54 x 103 W

Calories and Metabolism After eating 300 grams of yogurt, Bob decides to go for a run to burn off the extra energy. The yogurt provides 4.4 MJ/kg, and Bob is able to raise his metabolic rate to 240 Watts while running. How long does he have to run? Select one: a. 5.50 x 103 minutes b. 5.50 x 103 seconds c. 3.00 x 103 seconds d. 100 minutes e. 50 minutes

b. 5.50 x 103 seconds

Fluids An object weighs 15 N in air and 13 N when submerged in mineral spirits, which has a density of 788 kg/m3. Determine the density of the object. Hint: This question is similar to the class example where you determine the density of a crown. Select one: a. 500 kg/m3 b. 5.9 × 103 kg/m3 c. 330 kg/m3 d. 1.2 × 103 kg/m3 e. 7.5 × 103 kg/m3

b. 5.9 × 103 kg/m3

Sound A middle-aged man typically has poorer hearing than a middle-aged woman. In one case a woman can just begin to hear a musical tone, while a man can just begin to hear the tone only when its intensity level is increased by 7.80 dB relative to the just-audible intensity level for the woman. What is the ratio of the sound intensity just detected by the man to the sound intensity just detected by the woman? Select one: a. 7.80 b. 6.03 c. 0.780 d. 1 e. 10

b. 6.03

Calories and Metabolism One ounce of a well-known breakfast cereal contains 110 Calories (1 food Calorie = 4186 J). If 3.00% of this energy could be converted by a weight lifter's body into work done in lifting a barbell, what is the mass of the heaviest barbell that could be lifted a distance of 1.15 m for 20 reps? Note that Fg = mg. Select one: a. 2.04 x 103 kg b. 61.3 kg c. 1.23 x 103 kg d. 110 kg e. 4.4 x 103 N

b. 61.3 kg

Electricity The circuit in a flashlight consists of a resistor (the filament of the light bulb) connected to a 3.00 V battery. Assuming that the current through the resistor is 0.400 A, determine the resistance of the bulb and the electrical energy dissipated in the bulb in 5.50 minutes. Give your answers in SI units. Select one: a. 0.545 Ohms 1.10 x 10-4 kWatt.hour b. 7.50 Ohms 396 J c. 0.133 Ohms 6.6 J d. 1.20 Ohms 396 J e. none of the above

b. 7.50 Ohms 396 J

Magnetism A uniform magnetic field is perpendicular to the plane of a horizontal wire loop of area 0.390 m2 and resistance 3.25 Ohms. Assume that the magnetic field is oriented vertically upward. If the field decreases by 0.500 T in 0.850 x10-3 s, will there be current induced in the loop? Why? If yes, what is the magnitude of the induced current? Hint: use Faraday's law and Ohm's law V=RI Select one: a. No the magnetic flux through the loop does not change b. Yes the magnetic flux through the loop changes 70.6 A c. No the loop does not rotate d. Yes magnetic flux through the loop changes 150 A e. Yes the area vector of the loop changes 15 A

b. Yes the magnetic flux through the loop changes 70.6 A

Light A college professor can see objects clearly only if they are between 80.0 cm and 500 cm from her eyes. Her optometrist prescribes bifocal contact lenses that enable her to see distant objects through the top half of the lenses and read students' papers through the lower half. What are the respective powers of the top and bottom lenses? Draw pictures. Select one: a. Top (Nearsightedness correction): -1.25 D Bottom (Farsightedness correction): +5.00 D b. Top (Nearsightedness correction): +0.200 D Bottom (Farsightedness correction): -2.75 D c. Top (Nearsightedness correction): -0.200 D Bottom (Farsightedness correction): +2.75 D d. Top (Nearsightedness correction): +0.200 D Bottom (Farsightedness correction): -5.25 D e. Top (Nearsightedness correction): +0.200 D Bottom (Farsightedness correction): +5.25 D

c. Top (Nearsightedness correction): -0.200 D Bottom (Farsightedness correction): +2.75 D

Light The near point of a farsighted person is 100 cm. She places reading glasses close to her eyes, and with them she can comfortably read a newspaper at a distance of 25 cm. What lens power is required? Select one: a. +3.2 D b. +2.5 D c. +3.0 D d. -2.0 D e. -2.5 D

c. +3.0 D

Fluids A balloon inflated with helium gas (density = 0.2 kg/m3) has a volume of 6 × 10-3 m3. If the density of air is 1.3 kg/m3, what is the buoyant force exerted on the balloon? Select one: a. 0.01 N b. 1.3 N c. 0.08 N d. 7.8 N e. 0.8 N

c. 0.08 N

Fluids What is the mass of a solid iron wrecking ball of volume 18.0 cm3? Take the density of iron to be 7.80 x 103 kg/m3. Hint: convert volume to m3. Select one: a. 2.70 x 1011 kg b. 1.40 x 103 kg c. 0.140 kg d. 1.91 x 108 kg e. 191 kg

c. 0.140 kg

Magnetism A flat coil of wire has an area A, N turns, and a resistance R. It is situated in a magnetic field, such that the normal to the coil is parallel to the magnetic field. The coil is then rotated through an angle of 90 degrees, so that the normal becomes perpendicular to the magnetic field. The coil has an area of 1.50 x 10-3 m2, 50 turns, and a resistance of 140 Ohms. During the time while it is rotating, a charge of 8.50 x 10-5 C flows in the coil. What is the magnitude of the magnetic field? Select one: a. 6.31 T b. 7.93 T c. 0.159 T d. 15.9 T e. 8.93 x 10-5 T

c. 0.159 T

Electricity The battery pack of a pocket calculator has a voltage of 3.0 V and delivers a current of 0.17 mA. How much charge flows through the circuit in one hour of operation? Hint: use the definition for electric current. Select one: a. 0.17 mC b. 4.7 x 10-5 C c. 0.61 C d. 0.17 C e. 0.51 C

c. 0.61 C

Fluids Water is flowing through a rectangular channel that is 12 m wide with a speed of 0.75 m/s. The water then flows into four identical rectangular channels that have a width of 3.0 m. The depth of the water does not change as it flows into the four channels. What is the speed of the water in one of the smaller channels? Select one: a. 0.25 m/s b. 2.3 m/s c. 0.75 m/s d. 0.56 m/s e. 3.0 m/s

c. 0.75 m/s

Electricity Consider two aluminum wires. Wire #1 has a length L and a cross-sectional area A. Wire #2 has a length 2L and a cross-sectional area A/3. Determine the ratio of the resistivity of wire #1 to the resistivity of wire #2. Select one: a. 1/18 b. 3/2 c. 1 d. 6 e. 1/6

c. 1

Sound A loudspeaker has a circular opening with a radius of 0.0950 m. The electrical power needed to operate the speaker is 25.0 W. The average sound intensity at the opening is 17.5 W/m2. What percentage of the electrical power is converted by the speaker into sound power? Select one: a. 10.0% b. 1.50% c. 1.98% d. 7.92% e. 20.5%

c. 1.98%

Sound At a rock concert, the sound intensity level corresponding to one band playing is 110 dB. What will the sound intensity level be if ten of the same bands are playing simultaneously? Select one: a. 140 dB b. 1100 dB c. 120 dB d. 20.4 W/m2 e. 220 dB

c. 120 dB

Light An object is placed 10 cm from a convex lens of focal length 20 cm. What is the magnification? Select one: a. 1.5 b. 0.5 c. 2.0 d. 1.0 e. 2.5

c. 2.0

Fluids A barometer is taken from the base to the top of a 279-m tower. Assuming the density of air is 1.29 kg/m3, what is the absolute value of the measured change in pressure? Select one: a. 2,120 Pa b. 359 Pa c. 3,530 Pa d. 2,730 Pa e. 927 Pa

c. 3,530 Pa

Sound Bats emit sounds of frequencies around 35.0 kHz and use echolocation to find their prey. Take the speed of sound in air to be 343 m/s. If a bat is moving with a speed of 12.0 m/s toward a tasty insect, determine the frequency perceived by the insect if the insect is moving away from the bat at a speed of 6.00 m/s. Draw picture. Select one: a. 634 Hz b. 33.2 kHz c. 34.4 kHz d. 35.6 kHz e. 36.9 kHz

c. 34.4 kHz

Electricity A parallel plate capacitor has a capacitance of 7.00 micro-Farads when filled with a dielectric. The area of each plate is 1.50 m2 and the separation between the plates is 1.00 x 10-5 m. What is the dielectric constant of the dielectric? Select one: a. 5.27 x 106 b. 9.30 x 10-12 c. 5.27 d. 4.67 x 10-5 e. 93.0

c. 5.27

Sound Children have smaller ear canals than adults. Consider a child's ear canal of length 1.30 cm. The speed of sound in the child's ear canal is 353.2 m/s. To what frequency is the child's ear most sensitive? In other words, what is the fundamental frequency of the child's ear canal? Select one: a. 3.00 kHz b. 6.60 kHz c. 6.79 kHz d. 13.6 kHz e. 20.4 kHz

c. 6.79 kHz

PDI The local hospital calls requesting information regarding a patient that they would like to schedule for an In-111 white blood cell (WBC) study tomorrow morning. The protocol requires at least 700 μCi of In-111 oxine to be incubated with the patient's blood in order to tag the WBCs. At 8 a.m. today, you have 1.15 mCi of In-111 oxine currently in inventory. How much activity will you have tomorrow at 8 a.m.? see decay tables or use Select one: a. 547 μCi b. 701 μCi c. 898 μCi d. 1016 μCi

c. 898 μCi

Magnetism A uniform magnetic field is perpendicular to the plane of a horizontal wire loop of area 0.390 m2 and resistance 3.25 Ohms. Assume that the magnetic field is oriented vertically upward. If the field decreases by 0.500 T in 0.850 x10-3 s, will there be current induced in the loop? Why? If yes, what is the magnitude of the induced current? Hint: use Faraday's law and Ohm's law V=RI Select one: a. Yes magnetic flux through the loop changes 150 A b. Yes the area vector of the loop changes 15 A c. Yes the magnetic flux through the loop changes 70.6 A d. No the magnetic flux through the loop does not change e. No the loop does not rotate

c. Yes the magnetic flux through the loop changes 70.6 A

Fluids Consider a bed of nails with an upper weight limit of 200 lbs (which corresponds to a weight of 889 N). Each nail has a tip area of 7.85 x 10-7 m2. When a 200-lb man lies down on the bed, the pressure at each nail point is 39.5 PSI. How many nails does the bed have? Select one: a. about 1000 nails b. about 6400 nails c. about 4160 nails d. 4.41 x 107 nails e. about 8700 nails

c. about 4160 nails

Light A drop of water on a countertop reflects light from a flower held 3.00 cm directly above it. The flower's diameter is 2.00 cm, and the diameter of the flower's image is 0.100 cm. What is the focal length of the water drop, assuming it can be treated as a convex spherical mirror? Select one: a. +0.143 cm b. -0.143 cm c. +0.05 cm d. -0.158 cm e. +0.158 m

d. -0.158 cm

Magnetism The transformer in a laptop's power adapter takes a 120-V input voltage and changes it to a 16.5-V output voltage. What is the turn ratio (secondary to primary) of the transformer? Select one: a. 7.27 b. 24:1 c. 1:600 d. 0.138 e. 1:24

d. 0.138

Electricity The battery pack of a pocket calculator has a voltage of 3.0 V and delivers a current of 0.17 mA. How much charge flows through the circuit in one hour of operation? Hint: use the definition for electric current. Select one: a. 0.51 C b. 4.7 x 10-5 C c. 0.17 C d. 0.61 C e. 0.17 mC

d. 0.61 C

Sounds A convertible moves toward you and then passes you; all the while, its loudspeakers are producing a sound. You are stationary. The speed of the convertible is a constant 9.00 m/s, and the speed of sound is 343 m/s. What is the ratio of the frequency you hear while the the convertible is approaching to the frequency you hear while the convertible is moving away? Select one: a. 1.00 b. 9.00 c. 1.10 d. 1.05 e. 0.949

d. 1.05

Determine the absolute pressure on the bottom of a swimming pool 28.0 m by 8.50 m whose uniform depth is 1.80 m. Also determine the absolute pressure against the side of the pool near the bottom. Select one: a. 1.76 x 104 Pa 1.76 x 104 Pa b. 1.013 x 105 Pa 1.013 x 105 Pa c. 1.19 x 105Pa 2.74 x 105 Pa d. 1.19 x 105 Pa 1.19 x 105 Pa e. 2.74 x 105 Pa 1.76 x 104Pa

d. 1.19 x 105 Pa 1.19 x 105 Pa

Fluids What is the difference in blood pressure (in Pascals) between the bottom of the feet and the top of the head of a 1.45-m-tall person standing vertically? Take the density of blood to be 1060 kg/m3. Select one: a. 136 Pa b. 1.16x105 Pa c. 1.18 Pa d. 1.51x104 Pa e. 1.71x 104 Pa

d. 1.51x104 Pa

Light The human eye is a complex multiple-lens system. However, it can be approximated to an equivalent single converging lens with an average focal length of about 1.70 cm when the eye is relaxed. If an eye is viewing a 2.00-m-tall tree located 15.0 m in front of the eye, what are the height and orientation of the image of the tree on the retina? Select one: a. 1.70 cm upright b. 1.13 mm inverted c. 2.27 mm upright d. 2.27 mm inverted e. 1.13 mm upright

d. 2.27 mm inverted

Electricity What is the capacitance of a capacitor that stores 4.3 micro-Coulombs of charge on its plates when a voltage of 1.5 V is applied between them? Select one: a. 3.49 x 10-7 F b. 6.45 x 10-6 F c. 6.45 F d. 2.87 x10-6 F e. 2.87 F

d. 2.87 x10-6 F

PDI What is the fraction of I-131 remaining after 30 days of storage in a waste room? (use I-131 decay table from handout or posted in Moodle) Select one: a. 3.7% b. 4.9% c. 6.9% d. 7.5%

d. 7.5%

Electricity Consider a cherry-red heating element on an electric stove. The element contains a wire (length = 1.10 m and cross-sectional area = 3.10 x 10-6 m2) through which electric charge flows. This wire is embedded within an electrically insulating material that is contained within a metal casing. The wire becomes hot in response to the flowing charge and heats the casing. The resistance of the wire at an operating temperature of 420 degrees Celsius is 29.0 Ohms. Determine the resistivity (at the same temperature) of the material from which the wire is made. Select one: a. 1.06 x 106 Ohms. m b. 6.82 x 10-5 Ohms. m c. 1.03 x 107 Ohms. m d. 8.17 x 10-5 Ohms. m e. none of the above

d. 8.17 x 10-5 Ohms. m

Light A simple single-lens camera (convex lens) is used to photograph a man 1.70 m tall who is standing 4.00 m from the camera. If the man's image fills the height of a frame of film (35 mm), what is the focal length of the lens? Select one: a. 4.21 m b. 83.7 mm c. -8.37 cm d. 80.7 mm e. 3.81 m

d. 80.7 mm

Calories and Metabolism Suppose the skin temperature of a naked person is 33.5 degrees Celsius when the person is standing inside a room whose temperature is 25.0 degrees Celsius. The skin area of the individual is 2.00 m2. a) Assuming that the emissivity is 0.830, find the net loss of radiant power from the body. b) Determine the number of food Calories of energy (1 food Calorie = 4186 J) that are lost in 2 hours due to the net loss rate obtained in part a). Metabolic conversion of food into energy replaces this loss. Select one: a. 742 Watts 1.28 x 103 Calories b. 8.31 x 1010 Watts 14.3 x 1010 Calories c. 831 Watts 1.43 x 103 Calories d. 88.4 Watts 152 food Calories e. 68 Watts 58 food Calories

d. 88.4 Watts 152 food Calories

PDI The regulatory limit for permissible radioactive contamination on a shipped package is 6600 dpm per 300 cm2. How many disintegrations occur in a 24 hour period for a container with a surface area of 300 cm2? Select one: a. 1.58 x 105 disintegrations b. 8.4 x 105 disintegrations c. 3.96 x 105 disintegrations d. 9.50 x 106 disintegrations e. 5.09 x 106 disintegrations

d. 9.50 x 106 disintegrations

Light Design the lens in a single-lens projector that will form a sharp image on a screen 4.00 m away with the slides 6.00 cm from the lens. If the object on a slide is 1.00 cm tall, how tall will its image on the screen be? Select one: a. f = +2.40 m 0.667 cm b. f = -2.40 m 0.667 cm c. f = -5.91 m 66.7 cm d. f = +5.91 cm 66.7 cm e. f = -5.91 cm 0.667 cm

d. f = +5.91 cm 66.7 cm

Light A dentist's mirror is placed 2.00 cm from a tooth. The enlarged image is located 5.6 cm behind the mirror. Determine the focal length of the mirror. Select one: a. +6.22 cm b. - 3.11 cm c. +1.47 cm d. +0.679 cm e. +3.11 cm

e. +3.11 cm

Magnetism A horizontal wire loop with an area 0.150 m2 is placed in a magnetic field of magnitude 0.275 T and oriented to the right as such that the plane of the loop is parallel to the magnetic field. Take the area vector pointing up. The loop is then rotated to the right by 90° in 2.50 x10-3 s and ends up with the plane of the loop perpendicular to the field. Draw pictures before and after rotation. If the wire loop has a resistance of 4.50 Ohms, what is the induced emf (include sign) and what is the magnitude of the induced current in the loop? Select one: a. 2.34 x 10-4 V 9.38 x 10-4 A b. - 37.5 V 9.38 A c. 9.38 V 37.5 A d. 37.5 V 37.5 A e. - 16.5 V 3.67 A

e. - 16.5 V 3.67 A

Light An optometrist prescribes contact lenses with a power of -4.0 D for a nearsighted student. What is the focal length of the lenses? Select one: a. 0.25 cm b. +25 cm c. -0.25 m d. 4.0 m e. -0.25 cm

e. -0.25 cm

Light What power contact lens must be used to correct the vision of a nearsighted person whose far point is 40 cm? Select one: a. 4.0 diopters b. 2.5 diopters c. -3.6 diopters d. -4.0 diopters e. -2.5 diopters

e. -2.5 diopters

Light What is the focal length of the corrective contact lens needed by a nearsighted person whose far point is 60 cm? Select one: a. +130 cm b. +60 cm c. -30 cm d. +30 cm e. -60 cm

e. -60 cm

Magnetism A flat circular coil with 105 turns, a radius of 4.00 x 10-2 m, and a resistance of 0.480 Ohms is exposed to an external magnetic field that is directed perpendicular to the plane of the coil. The magnitude of the external magnetic field is changing at a rate of 0.783 T/s, thereby inducing a current in the coil. Find the magnitude of the magnetic field at the center of the coil that is produced by the induced current. Select one: a. 0.861 T b. 0.452 mT c. zero d. 0.413 T e. 1.42 mT

e. 1.42 mT

Fluids Elaine went to her outside faucet to fill a 0.0189-m3 bucket with water to wash her car. Water exits with a speed of 0.61 m/s. The radius of the faucet is 0.0078 m. How long does it take to fill the bucket completely? Select one: a. 490 s b. 17 s c. 280 s d. 9.0 s e. 160 s

e. 160 s

Calories and Metabolism At a birthday party, a student ate a piece of cake (500 Cal). To prevent this energy from being stored as fat, she took a stationary-bicycle workout class the next day. This exercise requires the body to do work at an average rate of 200 Watts. How long must the student bicycle to achieve her goal of "working off" the cake's energy? Select one: a. 140 minutes b. 2.50 minutes c. 1.05 x 103 seconds d. 2.5 hours e. 174 minutes

e. 174 minutes

Magnetism A farmer decides to use a waterfall to create a small hydroelectric power plant for his farm. He builds a coil consisting of 1500 circular loops of wire with a radius of 20 cm, which rotates on the generator's armature at 60 Hz in a magnetic field. He needs to generate a maximum emf of 170 V. What is the magnitude of the generator's magnetic field necessary for this to happen? Select one: a. 1.5 T b. 0.50 T c. 0.25 T d. 0.025 T e. 2.4 mT

e. 2.4 mT

PDI Capsules of sodium iodide (I-123) are requested for thyroid imaging. If the physician orders 7.4 MBq of radioactivity, calculate how much this SI unit based prescription order equates to in traditional radioactivity units? (see unit conversion chart if necessary) Select one: a. 274 mCi b. 200 mCi c. 27.4 μCi d. 2.74 mCi e. 200 μCi

e. 200 μCi

Fluids Selena uses a garden hose to fill a bucket of water. The water enters the hose through a faucet with a 6.0-cm diameter. The speed of the water at the faucet is 5 m/s. If the faucet and the nozzle are at the same height, and the water leaves the nozzle with a speed of 20 m/s, what is the diameter of the nozzle? Select one: a. 2.0 cm b. 6.0 cm c. 1.5 cm d. 4.0 cm e. 3.0 cm

e. 3.0 cm

Magnetism The battery charger for an MP3 player contains a step-down transformer with a turn ratio (secondary to primary) of 1:32, so that the voltage of 120 V available at a wall socket can be used to charge the battery pack or operate the player. What voltage does the secondary coil of the transformer provide? Select one: a. 120 V b. 3840 V c. 9.00 V d. 0.267 V e. 3.75 V

e. 3.75 V

Magnetism The magnetic flux that passes through one turn of a 12-turn coil of wire changes to 4.0 from 9.0 Wb in a time of 0.0500 seconds. The average induced current in the coil is 230 A. What is the resistance of the wire? Select one: a. 0.192 Ohms b. 2.76 x 105 Ohms c. 0.435 Ohms d. 1200 Ohms e. 5.22 Ohms

e. 5.22 Ohms

Sound Hearing damage may occur when a person is exposed to a sound intensity level of 90.0 dB (relative to the threshold of hearing) for a period of 9 hours (1 hour = 3600s). One particular eardrum has an area of 2.00 x 10-4 m2. How much sound energy is incident on this eardrum during this time? Select one: a. 1.00 x 10-3 J b. 1.00 x 109 J c. 1.80 x 10-6 J d. 2.00 x 10-7 J e. 6.48 x 10-3 J

e. 6.48 x 10-3 J

Electricity A tiny ball (mass = 0.0120 kg) carries a charge of -1.80 x 10-5 C. What electric field (magnitude and direction) is needed to cause the ball to float above the ground? Select one: a. 6.53 x 103 N/C up b. 6.67 x 10-3 N/C down c. 5.44 x 105 N/C up d. 6.67 x 102 N/C down e. 6.53 x 103 N/C down

e. 6.53 x 103 N/C down

Sound A typical adult ear has a surface area of 2.10 x 10-3 m2. The sound intensity during a normal conversation is about 3.20 x 10-6 W/m2 at the listener's ear. Assume that the sound strikes the surface of the ear perpendicularly. How much power is intercepted by the ear? Select one: a. 2.10 x 10-15 Watts b. 656 Watts c. 1.52 x 10-3 Watts d. 6.72 Watts e. 6.72 x 10-9 Watts

e. 6.72 x 10-9 Watts

Electricity What is the cost to the nearest cent to run a 60-Watt light bulb for a 30 day month, assuming the bulb is on for 20 minutes a day? Assume the electric company charges 15cents/kWatt. hour. Select one: a. 6000 cents b. 3.6 x 104 cents c. 0.3 cents d. 6 cents e. 9 cents

e. 9 cents