Final Exam

Write the following numbers in scientific notation. (A) 7.500.000.000 = (B) 0.0000685 = (C) 546,300 =

(a) 7.5 x 10^9: (b) 6.85 x 10^-5; (c) 5.463 x 10^5

How many sig. figures are in each of the following? (A) 60.800.00 = (B) 0.002850 = (C) 2309700 =

(a) 7; (b) 4; (c) 5

Which principle or law states that an immersed body (completely or partially) is buoyed up by a force equal to the weight of the fluid it displaces? 1. Archimedes' Principle 2. Pascal's Principle 3. Bernoulli's Principle 4. None of the above.

1. Archimedes' Principle

What is the name of the imaginary path of a projectile? 1. Trajectory. 2. Projectile. 3. Parabola. 4. Neither of the above.

1. Trajectory.

In uniform circular motion, the speed of the rotating object 1. is constant. 2. increases. 3. decreases. 4. Not enough information.

1. is constant.

For an isolated positive charge, the surrounding electric field 1. is radially outward. 2. is radially inward. 3. intersect with each other. 4. comes out 75° from the charge.

1. is radially outward.

Which principle or law states that a change in pressure at any point in an enclosed fluid at rest is transmitted undiminished to all points in the fluid? 1. Archimedes' Principle 2. Pascal's Principle 3. Bernoulli's Principle 4. None of the above

2. Pascal's Principle

A method of writing very small numbers or very large numbers using the power of 10 is called 1. Scientific Method. 2. Scientific Notation. 3. Numerical Method. 4. Roman Numeral Notation.

2. Scientific Notation.

When an elevator accelerates downward, your weight reading on a scale is 1. zero. 2. less. 3. greater. 4. the normal weight.

2. less.

When an elevator accelerates upward, your weight reading on a scale is 1. zero. 2. less. 3. greater. 4. the normal weight.

3. Greater

Water pressure at the bottom of a lake depends on the 1. weight of water in the lake. 2. surface area of the lake. 3. depth of the lake. 4. all of the above.

3. depth of the lake.

When a bar magnet is broken into two, each piece is 1. as magnetic as the original magnet. 2. actually stronger than the original magnet. 3. half as strong as the original magnet. 4. no longer magnetic.

3. half as strong as the original magnet.

The velocity of a typical projectile can be represented by horizontal and vertical components. Assuming negligible air resistance, the horizontal component along the path of the projectile 1. increases. 2. decreases. 3. remains the same. 4. Not enough information.

3. remains the same.

Which of these nuclei has the greatest mass? 1. Hydrogen 2. Iron 3. Lead 4. Uranium

4. Uranium

What step in the scientific method describes hypothesis testing? A) Experimentation B) Conclusion C) Observation D) Prediction

A) Experimentation

Identify the number of protons, electrons and neutrons for the following atoms. Write your answers on the spaces provided for. Write zero (0) if there are no electrons in a shell. Al27.

A. 13p, 2e, 8e, 3e, 14n

Which is larger: a lithium atom or a fluorine atom? A. Lithium atom B. Fluorine atom C. Hydrogen Atom D. Helium Atom

A. Lithium atom

What is the velocity of the object with an initial velocity of 15 m/s and a final velocity of 15 m/s? The corresponding initial time is 20 s while the corresponding final time is 40 s? A) 10 m/s B) 15 m/s C) 5 m/s D) zero

B) 15 m/s

A nucleus with an atomic number of 44 and a mass number of 100 must have A) 44 neutrons. B) 56 neutrons. C) 100 neutrons. D) none of the above.

B) 56 neutrons.

A glance at your speedometer will tell you your A) average speed. B) instantaneous speed. C) overall speed. D) acceleration.

B) instantaneous speed.

What is the acceleration of the object with an initial velocity of 10 m/s and a final velocity of 15 m/s? The corresponding initial time is 10 s while the corresponding final time is 20 s? A) zero B) 0 m/s^2 C) 0.50 m/s^2 D) - 2.0 m/s^2

C) 0.50 m/s^2

Which of the following is a quantum number? A) 0.03 B) 0.3 C) 3 D) 2.5

C) 3

Which has a non-zero acceleration? A) an object at rest. B) an object moving at constant velocity. C) an object that changes direction. D) All of the above.

C) an object that changes direction.

The atomic number of an element matches the number of A) protons in the nucleus of an atom. B) electrons in a neutral atom. C) both of the above. D) none of the above.

C) both of the above.

Interference is a property of A) sound. B) light. C) Both of these. D) Neither of these.

C) both of these

Compared with the mass of a certain object on Earth, the mass of the same object on the Moon is A) less. B) more. C) the same. D) none of the above

C) the same.

As an object freely falls and reaches its terminal speed (maximum attained velocity), its A) velocity increases. B) velocity decreases. C) velocity remains the same. D) None of the above.

C) velocity remains the same.

The distance between adjacent peaks in the direction of travel for a transverse wave is its A) frequency. B) period. C) wavelength D) amplitude

C) wavelength

The angle of incidence equals the angle of reflection refers to as the A. Law of Refraction B. Law of Angles C. Law of Reflection D. Conservation Law

C. Law of Reflection

Ohm's Law. A light bulb used in a 4.00-volt flashlight has a resistance equal to 7.00 ohms. What is the current in the bulb when it is switched on? Round final answer to three (3) sig fig: A. 1.75 A B. 11.0 A C. 3.00 A D. 0.571 A

D. 0.571 A

Temperature Conversion. The record low temperature for February in Death Valley was - 19°C level. What is that temperature on the Fahrenheit scale (to the nearest tenth of a degree)? Answer in correct sig fig: A. TF= - 22.0 °F B. TF= 66.2 °F C. TF= - 28.3 °F D. TF= - 2.2 °F

D. TF= - 2.2 °F

What is the weight of a 2.5 kg toy car? 1. 25 N 2. 8 N 3. 15 N 4. 250 N

1. 25 N

When a hot cup is filled with cold water, the direction of heat flow is 1. from the cup to the water. 2. from the water to the cup. 3. random, in no particular direction. 4. nonexistent.

1. from the cup to the water.

An electric motor and electric generator are 1. in a way, similar devices with input and output roles exchanged or reversed. 2. entirely different devices. 3. neither of these 4. not sure

1. in a way, similar devices with input and output roles exchanged or reversed.

When energy is released by the process of fission or fusion, the total mass of the material after the event is 1. less. 2. the same. 3. more. 4. None of the above.

1. less.

Which pole of a compass needle points to a south pole of a magnet? 1. north pole 2. south pole 3. both of these. 4. none of these.

1. north pole

Work done on an object is NOT zero when 1. the displacement is not zero. 2. the displacement is zero. 3. the force is zero. 4. the force and displacement are perpendicular.

1. the displacement is not zero.

Wave that travels perpendicular (or up-and-down) to its direction of motion is called 1. transverse wave. 2. longitudinal wave. 3. compressional wave. 4. None of the choices.

1. transverse wave.

Which has the higher specific heat, water or land? 1. water. 2. land. 3. Both of the above are the same. 4. None of the above.

1. water.

The primary colors of light are 1. white. 2. magenta, cyan, and yellow. 3. red, blue, and green. 4. black

3. red, blue, and green.

According to Archimedes Principle, the buoyant force is equal to the 1. weight of the object floating on liquid. 2. volume of the liquid displaced by the immersed object. 3. weight of the water displaced by the object immersed in the liquid. 4. mass of the water displaced by the object immersed in the liquid.

3. weight of the water displaced by the object immersed in the liquid.

Compared with the primary rainbow, the secondary bow 1. is caused by two internal reflections. 2. is dimmer. 3. has colors reversed. 4. All of the above.

4. All of the above.

A fast-moving car hitting a haystack or hitting a cement wall produces vastly different results. Both experience 1. the same change in momentum 2. the same impulse. 3. Neither A nor B. 4. Both A and B.

4. Both A and B.

Archimedes Principle and Buoyant Force: An object immersed in water displaces 619 cm?. What is the buoyant force (in Newtons) exerted by the water on the object? ( Use g = 9.80 m/s^2). Round final answer to three (3) sig fig. A. 6.07 N B. 6070 N C. 60.70 N D. 607.0 N

A. 6.07 N

Wave Speed. A sound wave has a wavelength of 5.0 m and a frequency of 1.5 Hz. What is the wave speed? Answer in correct sig fig: A. 7.5 m/s B. 0.30 m/s C. 3.3 m/s D. 6.5 m/s

A. 7.5 m/s

What type of (mechanical) equilibrium is described when the net force on an object is zero, Sum of F = 0, and the object remains at rest? A. Static Equilibrium B. Dynamic Equilibrium C. Both of the above. D. None of the above

A. Static Equilibrium

What is the acceleration of the object with an initial velocity of 5 m/s and a final velocity of 0 m/s? The corresponding initial time is 50 s while the corresponding final time is 70 s? A) zero B) 0 m/s^2 C) - 0.50 m/s^2 D) - 0.25 m/s^2

D) - 0.25 m/s^2