Two bodies of equal mass m collide and stick together. The quantities that always have equal magnitude for both masses during the collision are
a. their changes in momentum.
b. the force each exerts on the other.
c. their changes in kinetic energy.
d. all of the above.
e. only (a) and (b) above.
e
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An object weighing 44.1 N hangs from a vertical massless ideal spring. When set in vertical motion, the object obeys the equation y(t) = (6.20 cm) cos[(2.74 rad/s)t - 1.40]. (a) Find the time for this object to vibrate one complete cycle
(b) What are the maximum speed and maximum acceleration of the object? (c) What is the TOTAL distance the object moves through in one cycle? (d) Find the maximum kinetic energy of the object. (e) What is the spring constant of the spring?
Consider some material that has been cooled until it has become a superconductor. If it is cooled even further its resistance will:
a. stay constant and non-zero. c. decrease. b. increase. d. None of these choices.
Why is Jupiter the largest planet in the solar system?
A) Because that's just the way it happened. B) Being the oldest planetary core, it had more time than the other planets to accumulate enough gas around itself before solar winds blew interplanetary dust away. C) Due to a massive collision with another protoplanet. D) Because of its distance from the Sun, the gravitational attraction between it and the Sun is perfectly balanced so as to create a density that results in the largest size of any planet.
The number of neutrons in a deuteron is ______________
Fill in the blank(s) with correct word