Which of the following statements about hadrons are correct? (There may be more than one correct choice.)
A) All hadrons are composed of quarks.
B) All hadrons interact by the strong nuclear force.
C) Hadrons are composed of leptons.
D) Electrons, protons, and neutrons are commonly-occurring hadrons.
E) Protons and neutrons are hadrons, but the electron is not.
A, B, E
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Saturn’s rings are composed of __________.
a. gas from the early solar system. b. a series of solid concentric circles. c. lots of individual particles of ice and rock. d. parts of Saturn’s upper atmosphere being vented into space
Two identical springs are attached to two identical masses. Both are resting on a frictionless horizontal surface. One of the springs is displaced a distance d from its equilibrium position, while the other is displaced a distance 2d
If both masses are released at the same instant,
which of the springs, A or B, returns to its
unstretched length first?
A 10. kg mass, hung onto a spring, causes the spring to stretch 2.0 cm. The spring constant is
A) 5.0 N/cm B) 49 N/cm C) 0.20 N/cm D) 20. N/m E) 0.0020 N/cm
Two eggs of equal mass are thrown at a blanket with equal velocity. Egg B hits the blanket but egg A hits the wall instead. Compare the work done on the eggs in reducing their velocities to zero
a. More work was done on A than on B. b. More work was done on B than on A. c. The amount of work is the same for both. d. It is meaningless to compare the amount of work because the forces were so different. e. Work was done on B, but no work was done on A because the wall did not move.