61. The mass-energy equivalence formula is given by: A. E = mc B. E=mc^2 C. E = 0.5mv^2 D. E = mgh

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61. The mass-energy equivalence formula is given by:
A. E = mc
B. E = mc^2
C. E = 0.5mv^2
D. E = mgh
62. A particle with a rest mass of 2 kg is moving at a speed of 0.9c relative to an observer. What
is the relativistic mass of the particle according to the observer?
A. 4.60 kg
B. 5.34 kg
C. 7.20 kg
D. 9.00 kg
63. A 10-meter-long train is moving at a speed of 0.8c relative to an observer. If the observer
measures an event at the front of the train to have occurred 1 second after an event at the
back of the train, what is the time difference between the two events according to an
observer on the train?
A. 0.6 s
B. 0.8 s
C. 1.0 s
D. 1.2 s
Transcribed Image Text:61. The mass-energy equivalence formula is given by: A. E = mc B. E = mc^2 C. E = 0.5mv^2 D. E = mgh 62. A particle with a rest mass of 2 kg is moving at a speed of 0.9c relative to an observer. What is the relativistic mass of the particle according to the observer? A. 4.60 kg B. 5.34 kg C. 7.20 kg D. 9.00 kg 63. A 10-meter-long train is moving at a speed of 0.8c relative to an observer. If the observer measures an event at the front of the train to have occurred 1 second after an event at the back of the train, what is the time difference between the two events according to an observer on the train? A. 0.6 s B. 0.8 s C. 1.0 s D. 1.2 s
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