Daisy (50. kg mass) skates on ice at 4.0 m/s to greet her friend (70. kg mass), who is standing still, with open arms. As they collide, while holding each other, with what speed do they both move off together?
A) 2.5 m/s
B) 1.7 m/s
C) zero
D) 5.0 m/s
B
Physics & Space Science
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A. Type II supernova B. Pulsar C. Nova D. Type Ia supernova E. None of these choices is correct.
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Our Sun will likely die as a Type I supernova in about five billion years
Indicate whether the statement is true or false
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What is the f-number of a camera lens that has an aperture-opening diameter of 0.30 cm and a focal length of 6.0 cm?
a. 0.30 b. 1.8 c. 20 d. 6.0 e. 0.05
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Which of the following are not relativistically invariant quantities?
a. the speed of light, c c. mass b. time d. energy
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