The first stage of Earth's evolution is _____
A) cratering
B) basin formation
C) differentiation
D) slow surface evolution
C
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There is no gravity in space
Indicate whether the statement is true or false
A hoop, a solid cylinder, and a solid sphere all have the same mass m and the same radius R. Each is mounted to oscillate about an axis a distance 0.5R from the center. The axis is perpendicular to the circular plane of the hoop and the cylinder and to an equatorial plane of the sphere as shown below. Which is the correct ranking in order of increasing angular frequency ??
?
?
A. hoop, cylinder, sphere B. cylinder, sphere, hoop C. sphere, cylinder, hoop D. hoop, sphere, cylinder E. sphere, hoop, cylinder
A quantity which is conserved in the collision of a car and a truck is
A. kinetic energy. B. total momentum. C. potential energy. D. momentum of the truck. E. momentum of the car.
A neutron in a nuclear reactor makes an elastic head-on collision with a carbon atom initially at rest. (The mass of the carbon atom is 12 times that of the neutron.) What fraction of the neutron's kinetic energy is transferred to the carbon atom?
a. 14.4% b. 28.4% c. 41.4% d. 56.6%