The nucleus of an atom is composed of protons and neutron held together by the
a. binding energy. b. strong nuclear force.
c. fusion. d. fission.
b
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A ball at the end of a string is swinging as a simple pendulum. Assuming no loss in energy due to friction, we can say for the ball that
A. the kinetic energy does not change but the potential energy does. B. the mechanical energy changes and is maximum where the kinetic energy is minimum. C. the potential energy is maximum at each end of the motion. D. the mechanical energy changes and is maximum where the kinetic energy is maximum.
Saturn's 1990 white spot had some similarities to Jupiter's Great Red Spot. Discuss some of the similarities and differences. Speculate as to what might cause these
What will be an ideal response?
If someone tells you they have a sample of niobium-90, can you tell how many neutrons are in the nucleus?
a. Yes, there are 41 neutrons. b. Yes, there are 90 neutrons. c. Yes, there are 49 neutrons. d. No, more information must be given. e. No, there is no such thing as "niobium.".
A 3.0-?F capacitor charged to 40 V and a 5.0-?F capacitor charged to 18 V are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 3.0-?F capacitor?
a. 11 ?C b. 15 ?C c. 19 ?C d. 26 ?C e. 79 ?C