Physics 010 Study Problems for Unit 1 -- Fall 2013
1. The Mogul project uses the sound channel in the atmosphere. Why is there a
sound channel in the atmosphere?
A.
B.
C.
D.
E.
Because temperature and pressure increases with altitude
Because temperature increases and pressure decreases with altitude
Because temperature decreases and pressure decreases with altitude
Because temperature decreases and pressure increases with altitude.
Its not related to temperature or pressure.
2. The speed of asteroid that hit our planet last fall was about
A.
B.
C.
D.
E.
speed of sound
speed of light
15 m/s
15 km/s
15 000 km/s
3. What does the atomic number of an element tells you about that element.
A.
B.
C.
D.
The number of protons it has
The number of neutrons it has
The number of electrons it has
The number of protons and neutrons together.
4. Roughly how many atoms can you fit on a single line, as closely packed as
possible, between State College and New-York city (about 400 km)?
A.
B.
C.
D.
4 x1015
4x 1023
4x1010
4 x 1020
5. A spring launches a block up a frictionless ramp. When the block is at a point
where its speed is half of what it was at the bottom of the ramp (right after being
launched by the spring), what does the energy budget diagram look like?
A
B
KGE
C
KGE
D
KGE
E
KGE
KGE
6. Physically, the type of energy represented by the water behind a dam is
A.
B.
C.
D.
kinetic
thermal
electromagnetic
gravitational
7. Which of the following is not a state of matter
A.
B.
C.
D.
E.
liquid
plasma
gas
solid
they all are states of matter.
8. A cup full of water and made of plastic feels warmer than one made of glass
because
A.
B.
C.
D.
plastic is warmed by water
plastic conducts heat less than glass
plastic conducts heat better than glass
plastic dissolves in water
9. Your computer uses 200 Watts of power. If you were to replace your computer’s
battery with one that only requires 100 Watts of power, how much money would
you save on your electricity bill in one day if you left your computer on for 10
hours/day and electricity was 5 cents per kWh (kilowatt-hour)?
A.
B.
C.
D.
10 cents
1 cent
5 cents
50 cents
10. A sinusoidal wave is traveling toward the right as shown. Which lettered arrow
correctly labels the wavelength of the wave?
A.
B.
C.
D.
A
B
C
D
11. A fire whistle emits a tone of 170 Hz. Take the speed of sound in air to be
340m/s. The wavelength of this sound is about:
A.
B.
C.
D.
0.5 m
2.0 m
4.0 m
0.25 m
12. A pendulum normally swings with a period of 1s. What happen to the period if
you start the pendulum twice as high?
A.
B.
C.
D.
E.
The period does not change
The period doubles
The period halves
The period quadruples
The period decreases by ¼.
13. Anita is running to the right at 5m/s. Balls 1 and 2 are thrown toward her by
friends standing on the ground. According to Anita, both balls are approaching her
at 10 m/s. Which statement is true?
A.
B.
C.
D.
Ball 1 was thrown faster
Ball 2 was thrown faster
Both balls were thrown at the same speed.
Not enough information to answer the question.
14. As the velocity of a moving object approaches the speed of light, what happens to
its energy?
A.
B.
C.
D.
It goes to zero
It goes to infinity
It becomes mc2
1
It becomes 2mc2
15. John has a twin sister Jane. Jane flies to a distance star at a high speed and then
returns to visit John on Earth. She then finds that
A.
B.
C.
D.
John is younger than she is
John is older than she is
they have returned to being the same age
they are both younger than each other
16. Why is there a minimum temperature but no maximum? Explain
17. Water will boil spontaneously in a vacuum—on the moon for example.
Given what we have seen in class, what do you think could be happening?
If you put an egg in this boiling water, will it cook? (would it get hot?)
Some useful formulas & constants:
K = ½ mv2
speed of sound in air = 340 m/s
speed of light , c = 3 x 108 m/s
For a wave v= λf
Size of an atom ~ 10-10 m
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