Practice P101 Final Exam
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1) According to "The Standard Model of Physics" how many
fundamental forces are there? a) one b) two c) three d) four e)
unknown
2) Light is due to which force? a) strong b) weak c) electromagnetism
d) gravity e)radiation
3) Protons stick together in the nucleus of an atom because of which
force? a) strong b) weak c) electromagnetism d) gravity d) radiation
4) Ocean tides on Earth are due to which force? a) strong b) weak c)
electromagnetism d) gravity
5) Radioactive decay of atoms is due to which force? a) strong b) weak
c) electromagnetism d) gravity
6) About how far does the gravitational force field of our sun extend?
a) millions of miles b) a few kilometers past the Earth c) light
years d) infinite
7) The source of energy in our Sun is due to a) fusion b) fission c)
fossil fuel
8) The source of energy in a nuclear power plant is a) fusion b) fission
c) fossil fuel
9) Global warming is primarily due to a) fusion b) fission c) fossil
fuel
10) The Greenhouse effect occurs because the atmosphere is opaque to long wavelengths of light, especially in the infrared. a) true b) false
11) An atom is determined by its number of a) protons b) neutrons c) electrons
12) The chemical properties of an atom come mostly from its a) protons b) neutrons c) electrons
13) If the electron energy shells of an atom are all filled, then the atom will be chemically a) excited b) inert c) at rest
14) An example of an atom in 11) is : a) Hydrogen b) Argon c) Sodium d) unknown
15) 'An atom wants its electron shells filled. ' This is the basis for all chemistry. a) true b) false
16) A body will remain at rest unless acted upon by net external forces. This is Newton's a) 1st Law b) 2nd Law c) 3rd Law d) 4th Law e) none
17) "We live in an interactive Universe! " is a poetic expression of Newton's a) 1st Law b) 2nd Law c) 3rd Law d) 4th Law e) none
18) The resistance of an object to change its state of motion is a measure of its a) mass b) inertia c) both of these d) neither of these.
19) One can think of heat capacity as "thermal inertia." a) true b) false
20) A body with a higher heat capacity than water will heat up a) faster b) slower c) same as water.
21) The primary method of heat transfer for a gas is a) convection b) conduction c) radiation
22) The difference between boiling and evaporation is a) evaporation happens only at the surface whereas boiling occurs throughout the liquid b) evaporation happens at all temperatures but boiling does not c) both of these d) none of these
23) As water in a kettle stars to boil, the energy from the stove flame goes into raising the temperature of the boiling water. a) true b) false
24) Water is most dense when it is a) at 0 degrees C b) 4 degrees C c) less than 0 degrees C
25) Would you or the gas company gain by having gas warmed before it passed through your gas meter? a) you would gain b) PG&E would gain c) doesn't matter - we love to give our money to PG& E
26) Planets would crash into the sun if it were not for a) their tangential velocities b) their vast distances from the sun c) the inverse-square law d) their relatively small masses.
27) What prevents the space shuttle from falling? a) gravity b) centripetal force c) centrifugal force d) nothing, it is continually falling around the earth.
28) What keeps the space shuttle from crashing into the Earth? a) it's distance from the Earth b) it's tangential velocity c) nothing, it is crashing into the Earth all the time!
29) In order for the space station to be in orbit around the earth it must have a tangential speed of at least a) 8 miles/hr b) the speed of light c) 8 km/sec
30) Astronauts in the space shuttle float around because a) there is zero gravity in the space shuttle b) they are in free fall with the space shuttle c) its all shot on a Hollywood movie set and is faked!
31) Which has a greater gravitational force on the Earth, the sun or the moon? a) sun b) moon
32) Which has a greater effect on the tides on the Earth, the sun or the moon? a) sun b) moon
33) If the earth were twice as close to the Sun as it is now, the gravitational force between them would be a) doubled b) halved c) tripled d) quadrupled
34) If one neutron is added to a helium nucleus, the resulting atom is a) hydrogen b) lithium c) helium
35) A completely submerged object always displaces its own a) volume of fluid b) density of fluid c) weight of fluid d) all of these e) none of these
36) What is the buoyant force acting on a 10 ton ship floating in the ocean? a) less than 10 tons b) 10 tons c) more than 10 tons d) depends on density of sea water
37) An anchor sinks to the bottom of the ocean. That is because its density is a) greater b) less c) equal to the density of ocean water.
38) A wiggle in time is a a) vibration b) wave c) both d) neither
39) The source of all wave motion is a a) wave pattern b) harmonic object c) vibrating object
40) Which of the following is not a transverse wave? A) sound b) light c) radio d) all of these e) none
41) If a train approaches you the frequency of its whistle is Doppler shifted a) higher b) lower
42) What does the speed of sound depend on? a) loudness of sound b) frequency of sound c) temperature of air d) wavelength of sound
43) Does sound travel faster in hot air or cold air? a) hot b) cold
44) If it takes 5 seconds for you to hear the thunder after you see the lightning strike, about how far
away is the lightning? (the speed of sound in air is 340 m/s) a) 1700m b) 68 m c) 340m d)10km
45) If it takes 3 seconds for your voice to echo off the back wall of a canyon, about how far away is that back wall? a) 1020m b) 113 m c) 510m d) 20,000 light years
46) If you drop a rock down a cliff and it hits the bottom 5 seconds later, how high is the cliff? a) 25 m b) 80 m c) 40 m d) 125 m
47) How long does it take the sound of the rock hitting to travel that distance? a) 2.75 secs b) .36 secs c) 5 secs d) unknown from info
48) How fast is the rock going just before it hits the ground? a) 10 m/s b) 50 m/s c) 5 m/s d) 340 m/s
49) If the rock has a mass of 1 kg, what does it weigh? a) 10 kg b) 1 kg c) 10 N d) 1 N
50) What is the potential energy of the rock at the top of the cliff relative to the ground below? a) 125 N b) 1250 N c) 1250 Joules d) 125 Joules
51) What is the kinetic energy of the rock when it hits the bottom? a) 125 m/s b)1250 Joules c) 125 Joules d) 125 N
52) What is the momentum of the rock just before it hits bottom? a) 50 kg m/s b) 500 kg m/s c) 10 kg m/s d) unknown
53) An echo is an example of waves being a) refracted b) reflected
54) Which would make a higher pitch sound, a big rock or a small rock? a) big c) small
55) Sound travels faster in certain solids than in gases because a) they are denser b) they have more elasticity c) both of these d) neither of these
56) Two identical waves that are in phase will interfere a) constructively b) destructively
57) Two identical waves that are out of phase interfere a) constructively b) destructively
58) A tuning fork vibrates at 200 times per second. What is its frequency? a) 20 hz b) 200 hz c) .002 hz
59) What is the wavelength of sound that the tuning fork produces? a) 600 meters b) 6.3 meters c) 1.7 meters d) unknown
60) Ella Fitzgerald can shatter a wine glass with her voice. This is a demonstration of a) echo b) sound refraction c) interference d)beats e)resonance
61) What is the cause of electric force? a) charges b) current c) voltage
62) What causes a current to flow? a) charges b) current c) voltage
63) What causes magnetism? a) charges b) current c) voltage
64) What causes electric shock? a) charges b) current c) voltage
65) What does the physical damage in electric shock? a) charges b) current c) voltage
66) A current carrying wire will deflect a magnet such as a compass is the basis for which device? a) transformer b) generator c) galvanometer d) motor
67) A magnetic field will deflect a current carrying wire is the basis for which device? a) transformer b) generator c) galvanometer d) motor
68) Rotating a coil of wire in a magnetic filed induces a current in the wire is the basis for which device? a)transformer b) generator c) galvanometer d) motor
69) Electric power can be transferred from one coil of wire to another by electromagnetic induction is the basis for what which device? a)transformer b) generator c) galvanometer d) motor
70) How much current will flow through a lamp bulb that has a resistance of 30 ohms when 12 Volts are impressed across it? a) .2 A b) .4 A c) 2.5 A d) 360 A
71) At 10 cents per KWhr, what does it cost to operate a 1500 Watt hairdryer for 30 minutes? a)12 cents b) 7.5 cents c) $75 d) a billion dollars
72) One of these things is not like the others and does not belong! Which one? a) radio wave b) blue light c) sound wave d) X ray
73) Which has the longest wavelength? a) microwave b) gamma wave c) radio wave d) infrared
74) What is the wavelength of a megahertz radio wave? a) 30 m b) 3 m c) 3000 m d) 300 m
75) What is the wavelength of a gamma ray (f = 10 18 Hz) a) 300 m b) 3 x 1010m c) 3 x 10-10 m
76) Which has greater energy, a radio wave or a gamma ray? a) radio b) gamma
77) Light shines on a pane of green glass and a pane of clear glass. The temperature will be higher in the a) clear glass b) green glass c) both the same
78) The complimentary color of blue is a)red b) green c) yellow d) cyan e) magenta
79) Which interacts more with sounds of high frequencies? a) large bells b) small bells c) both the same
80) Which interacts more with light of high frequencies ? a) large particles b) small particles c) same
81) The sky is blue because air molecules in the sky act as tiny a) mirrors that reflect blue light b) resonators which scatter blue light c) sources of white light d) prisms
82) A sheet of red paper will look black when illuminated with light that is a) red b) magenta c) cyan
83) If sunlight were green instead of white, the most comfortable color to wear on a hot day would be a) white b) black c) red d) green
84) Diffraction is a result of a) reflection b) refraction c) interference d) polarization
85) Interference is a property of a)light waves b) sound waves c) water waves d) all of these
86) Light will not pass through a pair of Polaroids when their axes are a) parallel b) perpendicular
87) An excited atom is an atom that a) has more electrons than protons b) has one or more displaced electrons c) is frantic!
88) Light is emitted when an electron a) is boosted to a higher energy level b) makes a transition to a lower energy level c) neither of these
89) Which color of light carries the most energy per photon? a) red b) green c) blue d) violet
90) A certain object emits infrared waves. If it were to emit light waves instead, its temperature would have to be a) higher b) lower c) the same
91) An excited atom becomes de-excited and emits a radio wave. If it were to emit an Xray instead, the electron would have to make a transition from an energy state that was a) higher b) lower c) doesn't matter.
92) A paint pigment absorbs UV and emits visible light is an example of a) phosphorescence b) fluorescence c) radiation d)a laser
93) Light that is monochromatic, in phase and coherent is and example of a) phosphorescence b) fluorescence c) radiation d)a laser
94) If a source of light is moving toward you, its speed will be a) increased b) descreased c) unchanged
95) If a source of light is moving toward you, its frequency will be a) blue shifted b) red shifted
96) The Universe appears to be a) blue shifted a) red shifted c) what?
97) Which form of radiation is the most penetrative? a) alpha b) beta c) gamma
98) If a sample of radioactive isotopes has a half-life of 1 week, how much of the original sample will be left at the end of one month? A) ½ b) ¼ c) 1/8 d) 1/16 e) 1/32
99) Compared to the mass of a uranium nucleus before fissioning, the pieces it splits into have a) less mass b) the same mass c) more mass
100) The difference in the mass above is converted into energy via the formula
a) F = ma b) E= mc2 c)E = mc3