When a meteor strikes Earth's surface, it is called a(n) ______________.
a. asteroid
b. star
c. planet
d. meteorite
e. ball
[Ques. 2] An object is placed 10 cm to the left of a converging spherical lens. The lens has a focal length of f = 5 cm. Where is the image formed?
a. 3.3 cm to the left of the lens
b. 3.3 cm to the right of the lens
c. 10 cm to the left of the lens
d. 10 cm to the right of the lens
[Ques. 3] A jet plane travels around the world at 2 000 mi/hr (894 m/s). Two accurate atomic clocks measure the times of flight, one on board the plane and the second on Earth. If it takes 12 hours to complete the journey, what will the time difference (in s) be?
a. 0.75
b. 0.50
c. 0.25
d. 1.0
e. 0.19
[Ques. 4] When a meteoroid enters Earth's atmosphere, it is called a(n) ______________.
a. meteor or shooting star
b. asteroid
c. star
d. planet
e. dwarf planet
[Ques. 5] The least diffraction occurs for
a. < d.
b. = d.
c. > d.
d. none of these; that is, it makes no difference.
[Ques. 6] A 30-year-old woman takes a trip on a rocket, leaving her 20-year-old brother behind. She travels at a speed of 0.8 c, and is gone 20 years, according to the younger brother. When she returns, how many years older/younger is she than her brother?
a. 2 years younger
b. 2 years older
c. 3 years older
d. 10 years older
e. 8 years older
[Ques. 7] ______________ is the largest known asteroid.
a. Pluto
b. Mars
c. Ceres
d. Vesta
e. Mercury
[Ques. 8] The greatest diffraction occurs for
a. < d.
b. = d.
c. > d.
d. none of these; that is, it makes no difference.
[Ques. 9] A spaceship moving past the Earth with a speed of 0.800 c signals to the Earth with pulsed laser photons emitted at 10.0-second intervals according to the spaceship's clock. According to observers on Earth who see the flashes, the time interval they measure is
a. 13.4 s
b. 16.7 s
c. 12.5 s
d. 9.70 s
e. 6.03 s
[Ques. 10] Charon is a moon of ______________ .
a. Earth
b. Venus
c. Neptune
d. Mars
e. Pluto
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