Physical Science 1400 Final 2015

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molecular motion in a gas is the minimum possible at

0 K

the longest of the following is

0.00001 km

a centimeter is

0.01 m

When 90 kJ is removed from a 2- kg copper bar, its temperature drops from 200 C to 85 C. The specific heat of copper is

0.39 kJ/kg C

a 90 kg llama has an average power output of 80 W. The minimum time the llama can go up a hill 500 m high is

1.5 hr

a total of 4900 J is expanded lifting a 50 kg mass. The mass is raised to a height of

10 m

a 80 dB sound carries more energy than a 40 dB sound by a factor of

10,000

the prefix kilo- stands for

10^3

the prefix giga- stands for

10^9

ocean waves with a period of 10 s are found to have a wavelength of 120 m. their speed is

12 m/s

the kinetic energy of a 900-kg car whose speed is 16.6 m/s is

124 kJ.

the number of atoms in a molecule of Ca3(PO4)2 is

13

a heat engine absorbs heat at 127 C and exhausts heat at 77 C. Its maximum efficiency is

13 percent

the musical note A has a frequency of 220 Hz and its wavelength in seawater is 3.5 m. The speed of sound in seawater is

1540 m/s

the specific heat of water is 4.2 kJ/kg C. The heat needed to warm 8 kg of water from 20 C to 70 C is

1680 kJ

an absolute temperature of 100 K is the same as a celsius temperature of

173 C

a person is 5ft 8.0 in. tall. This is equivalent to

173 cm

the speed of light in a transparent plastic whose index of refraction is 1.5 is

2 x 10^8 m/s

a 400 kg concrete block is 1 m long, 0.6 m wide, and 0.3 m high. its density is

2222 kg/m

the pressure on 100 liters of helium is increased from 100 kPa to 400 kPa. the new volume of the helium is

25 liters

radio amateurs are permitted to communicate on the "10 meter band" What frequency of radio waves corresponds to a wavelength of 10 meters? The speed of radio waves is 3 x 10^8 m/s

3.0 x 10^7 Hz

a medal in a plastic cube whose index of refraction is 1.5 appears to be 20 mm below the upper surface of the cube. The depth of the medal is actually

30 mm

in order to double the average energy of the molecules in a gas at 200 K, its temperature must be changed to

400 K

the speedometer of a European car gives its speed in kilometers per hours. A car traveling 80 km/hr is going how many miles /hr?

50 miles/hr

six flutes playing together produce a 60 dB sound. The number of flutes needed to produce a 70 dB sound is

60

The density of air is 1.3 kg/m^3. The air in a room 5 m long, 4 m wide, and 2.5 m high has a mass of

65 kg

what is the linear momentum of a formula 1 car weighing 702 kg and moving at a speed of 100 m/s

70, 200 kg-m/s

the number hydrogen atoms in a molecule of C3H5(OH)3 is

8

a frequency that is not an overtone of the fundamental frequency F is

F/2

PbO

Lead (II) oxide

chemical formula for lithium phosphate

Li3PO4

sodium chloride crystals consists of

Na+ and Cl- ions

KOH

Potassium Hydroxide

which of the following chemical equations is unbalanced

SO2 + H2o >H2SO4

a celsius thermometer and an absolute thermometer are used to measure the temperature of the same gas sample. The readings on the thermometers are respectively Tc and Tk. Which is correct?

Tc is smaller than Tk

the scientific method

a continuing process

at room temperature, chlorine is

a greenish-yellow gas

iodine is an example of

a halogen

maxwell based his theory of electromagnetic waves on the hypothesis that a changing electric field gives rise to

a magnetic field

a magnet does not exert a force on

a stationary electric charge

in a covalent molecule,

adjacent atoms share one or more pairs of electrons

an atom that loses its outer electron or electrons readily is

an active metal

organic compounds

are covalent and contain carbon

a scientific law or theory is valid

as long as it is not contradicted by new experimental findings

elements can be distinguished unambiguously by their

atomic numbers

light of which color has the shortest wavelength

blue

the freezing point of a substance is always lower than its

boiling point

which of the following has the highest power output

both trains have the same power output

people used to think that heat was an actual substance called

caloric

heat transfer in a vacuum

can take place only by radiation

in an isolated system, entropy

cannot decrease

the atomic number of an element determines its

chemical behavior

three methods of heat transfer

conduction convection radiation

a free radical is extremely reactive because it

contains unpaired electrons

the heliocentric model of the solar system was presented by

copernicus

an element that can form an ionic compound with chlorine is

copper

IBr

covalent

NO4

covalent

SiF4

covalent

in each period of the periodic table, metallic activity

decreases to the right

which of the following quantities is independent of the size and shape of an object composed of a given material

density

the maximum possible efficiency of a heat engine

depends on the ratio between the exhaust and intake temperatures

the bending of waves around the edge of an obstacle in their path is an example of

diffraction

if I apply a force of 80N against a wall for 8 hours, but the wall doesn't move, I have

done no work

relative to the stars, the moon and sun seem to move

eastward or westward

three particles that make up an atom

electron proton neutron

what was kepler's main contribution to astronomy and the model of the solar system

ellipsis

when waves go from one place to another, they carry

energy

the property of light waves that leads to the phenomenon of color is

frequency

of the following metals the least active chemically is

gold

a vertical column in the periodic table is called a

group

an inert gas atom

has a filled outer shell

what eventually becomes of the energy of sound waves

heat

the law of gravity

holds everywhere in the universe

the entropy of a body of matter is a measure of

how disordered its molecules are

how many atoms of which elements are present in a molecule of CH3(CH2)2Cl

hydrogen 7 chlorine 1 carbo 3

Thin films of oil an soapy water owe their brilliant colors to a combination of reflection, refraction and

interference

NazS

ionic

chlorine forms Cl- ions. the compound FeCl3 is called

iron (II) chloride

when heat is added to a body of matter, the resulting temperature increase does not depend upon

its shape

when a car is rolling down a hill, its potential energy is converted into

kinetic energy and heat

a halogen atom

lacks one electron from having a filled outer shell

the first law of thermodynamics is the same as the

law of conservation of energy

you are looking at the bottom of a lake 1.2 m deep from a boat. to you the lake seems to be

less than 1.2 m deep

simple machines

lever wheel and axle pulley inclined plane screw wedge

the greater the decibel [db] level of a sound wave the

louder it is

a thermometer calibrated in the celsius scale and a thermometer calibrated in the fahrenheit scale are used to measure the same temperature. the numerical reading on the fahrenheit thermometer

may be smaller or larger than that on the celsius thermometer

the pressure on the bottom of an object inside a liquid is

more than the pressure on its top

if the half-life of a radionuclide is 1 month, is the sample of it completely decayed after 2 months

no

the period of the moons's orbit around the earth is

one month

the period of the earth's orbit around the sun is

one year

a compound whose name ends in -ate always contains

oxygen

in a transverse wave, the individual particles of the medium move

perpendicular to the direction of travel

a moving object does not always have

potential energy

the watt is a unit of

power

who proposed that the earth was in the center of the solar system

ptolemaic

the geocentric model of the solar system was presented by

ptolemy

the sievert is a unit of

radiation dosage

a pencil in a glass of water appears bent. this is an example of

refraction

three types of interference

refraction reflection diffraction

I am holding a book 1 m above a table in the third floor of a building that is 80 m above sea level the potential energy is highest when calculated relative to

sea level

which of the following substances is a homogenous mixture

seawater

each vertical column of the periodic table includes elements with chemical characteristics that are, in general,

similar

of the following kinds of waves, the ones that cannot travel through a vacuum are

sound waves

when an ice skater puts most of her mass along her spin axis, the conservation of angular momentum makes her

spin faster

when a gas is forced into a smaller volume without a change in temperature, its pressure increases because no molecules

strike the container walls more often

which car manufacturer is named after the star cluster pleiades

subaru

what do you call the phase transition from solid directly to gas

sublimation

which of the following sentences contains an accurate and complete measurement?

the length of the block is 5.3 cm

the higher the frequency of a wave,

the shorter its wavelength

the half like of a radionuclide is

the time needed for half a sample to decay

what never changes when two or more objects collide

the total momentum of the objects

sublimation refers to

the vaporization of a solid without first becoming a liquid

which of the following statements is not true of all metals

they are solid a room temperature

one liter of hydrogen gas at atmospheric pressure is allowed to expand to a volume of 3 liters with the temperature held constant. If the average speed of the hydrogen molecules was originally v, their new average speed is

v

the image formed by a diverging lens of a real object is always which of the following

virtual

an example of a wave that is partly longitudinal and partly transverse is a

water wave

the work energy theorem states the W_input= changePE+changeKE+W_output. In this equation W_output, stands for

work done by the object

if 10^5 electrons are added to a neutral object, its charge will be

-1.6 x 10(-14) C

the specific heat of ice is 2.1 kJ/kg C. When 50 kJ of heat is removed from 2 kg of ice initially at -5 C, the final temperature of the ice is

-17 C

at which of the following celsius temperatures will a fahrenheit thermometer show the same reading in degrees

-40 C

a 2-kg book is held 1 m above the floor for 50 s. the work done is

0 J


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