When a hydrogen bomb explodes, hydrogen fuses to form helium. According to Einstein's mass-energy equivalence that is, according to E=mc2, does this result in an change in the total mass of the material?
A) Yes, the mass increases, but by such a small amount that it would be impossible to measure it.
B) Yes, the mass increases, and by a measurable amount.
C) Yes, the mass decreases, and by a measurable amount.
D) Yes, the mass decreases, but by such a small amount that it would be impossible to measure it.
E) No, the mass remains exactly the same.
Question 2
Which of the following describes an object that is moving with an unchanging speed but a changing velocity?
A) A car slowing down while moving along a straight line.
B) A car rounding a curve at a steady 80 km/hr.
C) A car moving along a straight horizontal (level) line at a steady 80 km/hr.
D) A car moving up a straight hill a hill whose slope is unchanging at a steady 80 km/hr, when the car is midway up the hill.
E) Both answers C and D are correct.
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