What nuclear fusion mechanism does an isolated white dwarf use to generate energy?
a. Proton-proton chain
b. CNO cycle
c. Triple alpha process
d. White dwarfs don't generate their own energy.
D
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Series/Parallel Circuits: If emf of the ideal battery is V = 100 V, what is the potential difference across R5 for the circuit shown in the figure?
A. 19 V B. 40 V C. 75 V D. 77 V
If the speed of a car is tripled, the impulse required to stop the car changes by a factor of
A. 3. B. 1/3. C. 1. D. 9. E. 1/9.
A jar holds 2.0 L of ideal nitrogen gas, N2, at STP. The atomic mass of nitrogen is 14.0 g/mol, the ideal gas constant is R = 8.31 J/mol ? K, Avogadro's number is NA = 6.022 × 1023 molecules/mol, and 1.00 atm = 101 kPa
(a) How many moles of nitrogen are in the jar? (b) How many nitrogen molecules are in the jar? (c) What is the mass of the nitrogen in the jar?
A light bulb is connected to a battery as shown in Figure A below. When a second bulb is connected as shown in Figure B, what happens to the brightness of the original bulb?