A Mack truck and a Mini Cooper traveling at the same speed collide head-on. The vehicle to undergo the greatest change in velocity will be the
A) Mini Cooper.
B) Mack truck.
C) same
Answer: A
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When we fission the U-235 nucleus, the total rest-mass of all the resulting fragments of matter
A) is more than the mass of the original nucleus B) is the same as the mass of the original nucleus. C) is turned into broccoli. D) is less than the mass of the original nucleus. E) None of the above.
Considering only the role of dark matter and keeping all other factors the same, which hypothetical universe is oldest?
A) the one with more dark matter B) the one with less dark matter C) Dark matter doesn't affect the inferred age of the universe.
The Egyptian constellation found where modern Orion is located
A 0.20-kg block rests on a frictionless, level surface and is attached to a horizontally aligned spring with a spring constant of 80 N/m. The block is initially displaced 4.0 cm from the equilibrium point and then released to set up a simple harmonic motion. What is the speed of the block when it passes through the equilibrium point?
a. 2.1 m/s c. 0.80 m/s b. 1.6 m/s d. 0.57 m/s