____ 2.
____ 3.
____ 4.
____ 5.
____ 6.
____ 7.
On which day will the amount of water vapor in the air be greater, a summer day at 100% humidity or a winter day at 100% humidity?

summer day
winter day
neither, at 100% humidity they both hold the same amount of water.

When 10 grams of a substance loses 20 calories in cooling 5°C, its specific heat capacity is
a. 10 b. 0.4 c. 2.5
Of the following types of radiant energy, which has the shortest wavelength?
a. infrared radiation b. visible light
c. ultraviolet radiation
When mechanical work is done on a system, there can be an increase in

temperature only.
internal energy only.
both internal energy and temperature.

When a gas undergoes an adiabatic compression

it gains internal energy and its temperature increases.
it is compressed into a liquid by adiabatic liquefaction.
its volume decreases but its temperature remains constant.
scih036058_51_netshitangani_kwinda.pdf

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Course Name: Physics 2
Student: Kwinda Netshitangani
Course ID: SCIH036058
ID: J47865775
Submittal: 51
Progress Test 1
This Progress Test covers the course materials that were assigned in Units 1 and 2. Although the progress test is
similar in style to the unit evaluations, the progress test is a closed-book, proctored test. You may not have access
to notes or any of the course materials while you are taking the test. It is important that you do your own work.
Select the response that best completes the statement or answers the question.
You may use your calculator or scratch paper to work out solutions.
____ 1.
On which day will the amount of water vapor in the air be greater, a summer day at 100% humidity or a
winter day at 100% humidity?
a.
b.
c.
____ 2.
When 10 grams of a substance loses 20 calories in cooling 5°C, its specific heat capacity is
a.
b.
c.
____ 3.
it gains internal energy and its temperature increases.
it is compressed into a liquid by adiabatic liquefaction.
its volume decreases but its temperature remains constant.
When water condenses out of the air, it is what type of process?
a.
b.
c.
____ 7.
temperature only.
internal energy only.
both internal energy and temperature.
When a gas undergoes an adiabatic compression
a.
b.
c.
____ 6.
infrared radiation
visible light
ultraviolet radiation
When mechanical work is done on a system, there can be an increase in
a.
b.
c.
____ 5.
10
0.4
2.5
Of the following types of radiant energy, which has the shortest wavelength?
a.
b.
c.
____ 4.
summer day
winter day
neither, at 100% humidity they both hold the same amount of water.
A cooling process.
A warming process.
Neither a cooling nor a warming process.
Which of the following affects the period of a pendulum?
a.
b.
c.
the height from which it is released.
the mass of the pendulum.
the acceleration of gravity.
____ 8.
Firewalkers who walk barefoot on red-hot wood coals depend on
a.
b.
c.
____ 9.
mind over matter.
the poor conductivity of the wood.
the layer of hot air directly over the surface of the coals.
Which of the following is a longitudinal wave?
a.
b.
c.
light
radio wave
sound
____ 10. Under what conditions will ice form?
a.
b.
c.
when enough energy is added to water to reach 0 degrees C
when enough energy is removed from water to reach 0 degrees C
when enough energy is removed from water to reach100 degrees C
____ 11. Antinodes are positions on a standing wave that have
a.
b.
c.
the minimum amplitude.
the maximum amplitude.
a random amplitude.
____ 12. Radiation from the sun often gets trapped in Earth’s atmosphere because
a.
b.
c.
radiation from the sun comes in at an angle to Earth.
long-wavelength radiation is absorbed by the atmosphere.
the atmosphere allows only visible light to enter.
____ 13. Consider the space in the center of a metal ring. If the ring is heated, the space becomes
a.
b.
c.
smaller.
larger.
depends on the material.
____ 14. An observer on the ground hears a sonic boom that is created by an airplane flying at a speed
a.
b.
c.
equal to the speed of sound.
greater than the speed of sound.
just below the speed of sound.
____ 15. If you add a –10°C piece of ice to a 15°C glass of water, you might get water at
a.
b.
c.
-10°C
5°C
15°C
____ 16. The time needed for a wave to make one complete cycle is its
a.
b.
c.
frequency.
velocity.
period.
____ 17. How can the ideal efficiency of a heat engine be increased?
a.
b.
c.
Increase the temperature of the high-temperature reservoir.
Increase the temperature of the low-temperature reservoir.
Decrease the temperature of the high-temperature reservoir.
____ 18. A grandfather clock is running slow. To decrease the period of the swing you would
a.
b.
c.
move the mass at the end of the pendulum up, making the length of the pendulum shorter.
move the mass at the end of the pendulum down, making the length of the pendulum longer.
add more mass to the pendulum.
____ 19. Which, if they start out at the same temperature, will cool more slowly on a cold day?
a.
b.
c.
dry beans
soup
toast
____ 20. A sonic boom occurs
a.
b.
c.
just before an airplane reaches the speed of sound.
just as an airplane reaches the speed of sound.
anytime an airplane is traveling faster than the speed of sound.
____ 21. The total of all types of energy contained in an object is its
a.
b.
c.
heat.
internal energy.
specific heat capacity.
____ 22. Two identical blocks of iron, one at 10 degrees C and the other at 20 degrees C, are put in contact. Suppose
the cooler block cools to 5 degrees C and the warmer block warms to 25 degrees C. This would violate
a.
b.
c.
the first law of thermodynamics.
the second law of thermodynamics.
both the first and second laws of thermodynamics.
____ 23. Heat is the
a.
b.
c.
average amount of energy per molecule contained in an object.
total amount of energy contained in an object.
energy transferred between objects because of a temperature difference.
____ 24. Sunlight contains all the colors, but much of it is
a.
b.
c.
blue
violet.
yellow.
____ 25. What happens when heat is added to a system?
a.
b.
c.
d.
Much of it is destroyed immediately.
It transforms into an equal amount of some other form of energy.
Much of it is lost.
It is used to overcome friction.
____ 26. If you double the frequency of a vibrating object, its period
a.
b.
c.
halves.
is quartered.
doubles.
____ 27. A weight on the end of a spring bobs up and down one complete cycle every 5.00 seconds. Its period is
a.
b.
c.
0.20 sec.
5.00 sec.
0.20 1/sec.
____ 28. Heat travels from the sun to the Earth by
a.
b.
c.
conduction.
radiation.
convection.
____ 29. What kind of wave vibrates up and down as they travel left to right?
a.
b.
c.
both transverse and longitudinal
transverse
longitudinal
____ 30. The Doppler effect is a change in either sound or light frequency due to the motion of either the source or
the receiver.
a.
b.
True
False
____ 31. If you cool a sample of air from zero on the Celsius scale to near zero on the absolute scale, the air loses
a.
b.
c.
volume.
pressure.
both volume and pressure.
____ 32. Light that reflects at glancing angles from nonmetallic surfaces, such as glass, water, or roads is
a.
b.
c.
polarized perpendicular to the surface.
polarized parallel to the surface.
randomly polarized.
____ 33. A satellite TV company broadcasts its signals from its earthbound station to a satellite in orbit 36,000km
away, and from there back to Earth’s surface. How much time does it take for the signal to get from the
station to the customer?
a.
b.
c.
0.12 seconds
0.24 seconds
8.3 seconds
____ 34. Noise canceling earphones are an example of
a.
b.
c.
constructive interference.
destructive interference.
beats.
____ 35. Which waves are examples of a longitudinal wave?
a.
b.
c.
waves in the strings of instruments
light waves
sound waves
____ 36. Which temperature scale labels the boiling point of water at 212 degrees?
a.
b.
c.
Celsius
Kelvin
Fahrenheit
____ 37. A leaf on a pond oscillates up and down two complete cycles each second as a water wave passes. What
is the wave’s frequency?
a.
b.
c.
0.5 hertz
2 hertz
4 hertz
____ 38. According to the following table, determine the source of sound that is 10 times louder than normal speech.
a.
b.
c.
old subway train
busy street traffic
jet engine at 30m
____ 39. The amount of energy needed to change the temperature of one gram of a substance one degree is its
a.
b.
c.
heat.
specific heat capacity.
a calorie.
____ 40. As a system becomes more disordered, entropy
a.
b.
c.
remains the same.
decreases.
increases.
____ 41. Systems that are left alone tend to move toward a state of
a.
b.
c.
more entropy.
less entropy.
no entropy.
____ 42. A piece of iron (specific heat = 0.12 cal/g°C) and a cup of water both have the same temperature. If they are
heated so that the internal energy of each doubles
a.
b.
c.
both will have the same temperature.
the water will have the higher temperature.
the iron will have the higher temperature.
____ 43. As a fire truck speeds towards you, what is true of the frequency of the sound that you hear because of the
Doppler Effect?
a.
b.
c.
The frequency is increasing, resulting in a higher pitch.
The frequency is decreasing, resulting in a lower pitch.
The frequency does not change but the wavelength does.
____ 44. The first law of thermodynamics says that
a.
b.
c.
when energy is added to a system it transforms into an equal amount of other forms of energy.
energy does not spontaneously flow from cold to hot objects.
entropy always increases.
____ 45. Radio waves travel at the speed of light, 300,000 km/s. The wavelength of a radio wave received at 200
megahertz is
a.
b.
c.
0.7 m
1.5 m
6.7 m
____ 46. You dip your finger repeatedly into water to make waves. If you dip your finger more frequently, the
wavelength of the waves
a.
b.
c.
lengthens
stays the same.
shortens.
____ 47. All physical waves are created by
a.
b.
c.
changes in temperature.
objects that are moving in a straight line.
objects that are vibrating.
____ 48. Your friend claims that mixing colored paints gives the same results as mixing different colors of light. Do
you agree or disagree?
a.
b.
agree
disagree
____ 49. The lowest theoretical temperature in nature is
a.
b.
c.
–273 degrees C.
4 K.
0 degrees C.
____ 50. What color will an opaque object appear?
a.
b.
c.
the color it reflects
the color of the light that shines on it
the color it absorbs
Carefully review your answers on this progress test and make any corrections you feel are necessary. When
you are satisfied that you have answered the questions to the best of your ability, transfer your answers to the
online test submission page in the presence of your proctor.
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