A racecar driver steps on the gas,changing his speed from 10 m/s to 30 m/s in 4 seconds.The acceleration of the racecar is 10 m/s2.
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Q39: An object moving in a circle undergoes
Q40: A fast-moving body must have a larger
Q41: What is the proper abbreviation for 'kilohertz?'
A)kh
B)khz
C)Khz
D)KHz
E)kHz
Q42: What is the proper abbreviation for 'seconds?'
A)sec
B)There
Q43: Fifteen microseconds is
A)0.0000015 s.
B)0.000015 s.
C)0.00015 s.
D)0.015 s.
E)15000000
Q45: Two microcuries is
A)200,000 Ci.
B)0.0002 Ci.
C)0.00002 Ci.
D)0.000002 Ci.
E)0.00000002
Q46: When a body moves in circular motion
Q47: Twenty milliseconds is
A)0.00002 s.
B)0.0002 s.
C)0.002 s.
D)0.02 s.
E)20000
Q48: Twenty kilometers is
A)200,000 m.
B)20,000 m.
C)2,000 m.
D)200 m.
E)0.02
Q49: A racecar goes around a 200 m
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