A small car meshes with a large truck in a head-on collision. Which of the following statements concerning the magnitude of the average collision force is correct?
A)
The truck experiences the greater average force.
B)
The small car experiences the greater average force.
C)
The small car and the truck experience the same average force.
D)
It is impossible to tell since the masses are not given.
E)
It is impossible to tell since the velocities are not given.
C
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For the polymer in Example problem 9.4, calculate the total strain after 30 days if the material is subject to a creep test with a constant stress of 3×107 Pa. Assume that this material behaves as a Maxwell solid and the viscous part of this material behaves as a Newtonian fluid.
What will be an ideal response?
The numerous craters we see on the solid surfaces of so many Solar System bodies are evidence that ________.
A. they were bombarded in their youth by many solid objects B. these bodies were originally a mix of water and rock. As the young Sun heated up, the water boiled, creating hollow pockets in the rock C. the Sun was so hot that it melted all these bodies and made them boil D. they were so hot in their youth that volcanoes were widespread E. all the planets were once part of a single, very large and volcanically active mass that subsequently broke into many smaller pieces
Objects in the Kuiper belt:
A) are in random orbits at all inclinations to the ecliptic. B) lie beyond the orbit of Neptune, and close to the ecliptic. C) are the sources of long-period comets. D) are dense, like the iron meteorites. E) lie beyond the orbit of Neptune and perpendicular to the ecliptic.
Atmospheric pressure is approximately
A) 1.01 × 102 Pa B) 1.01 × 103 Pa C) 1.01 × 104 Pa D) 1.01 × 105 Pa E) 1.01 × 106 Pa