Angular momentum is conserved
A. only when the net force acting on the system is zero
B. only when the angular velocity is zero
C. only when the net torque acting on the system is zero
D. in all cases
C. only when the net torque acting on the system is zero
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A supplier wants to make a profit by buying gold by weight at one altitude and selling it at the same price per newton at another altitude. The supplier should
A) buy at a high altitude and sell at a low altitude. B) buy at a low altitude and sell at a high altitude. C) disregard altitude because it makes no difference.
Use a spreadsheet
(a) Use a spreadsheet program such as Microsoft Excel or write a computer program to calculate and then plot the entropy change relative to the pure separated elements for mixing 1 mole total of A-type and B-type atoms that form an ideal solution. Make this calculation in increments of 0.1 atom fraction change. (b) What chemical composition has the largest entropy of mixing, and what is this value?
The first complex life appeared on Earth about 0.5 billion years ago during the
a. Jurassic Period. b. Mississippian Period. c. Cambrian Period. d. Precambrian Period. e. Neolithic Period.
The energy level diagram for hydrogen
The energy of a photon emitted in a transition from the n = 3 state to the n = 2 state is __________.