A Mack truck and a Mini Cooper traveling at the same speed collide head-on. The collision force is greatest on the
A) Mini Cooper.
B) Mack truck.
C) same on both
Answer: C
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How do we know what goes on under the surface of the Sun?
A) We have X-ray images from satellites of the interior of the Sun. B) Astronomers create mathematical models that use the laws of physics, the Sun's observed composition and mass, and computers to predict internal conditions. C) We have sent probes below the surface of the Sun. D) By measuring Doppler shifts, we observe vibrations of the Sun's surface that are created deep within the Sun. E) both B and D
Relative to the age of the universe, how old is our solar system?
A) It is about 1% as old as the universe. B) It is about one-third the age of the universe. C) It is nearly the same age as the universe. D) It is between about 5% and 10% as old as the universe.
When a spring is compressed, its mass increases
Indicate whether the statement is true or false
The total mass of a galaxy tends to be only slightly larger than the visible mass
Indicate whether the statement is true or false