A ball is rolled up an incline so that it goes part-way up and then rolls back down. Which of the graphs below could represent its tangential component of acceleration vs. time, from the instant it is released until it returns to its starting point?
2
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Which of the jovian moons is the largest and also the largest moon in the solar system, even bigger than Mercury?
A) Titan B) Triton C) Ganymede D) Callisto E) Umbriel
Two point charges of values +3.6 and +6.9 ?C are separated by 0.40 m. What is the electrical potential at the point midway between the two point charges? (ke = 8.99 × 10^9 N?m2/C2)
a. +0.47 MV b. ?0.24 MV c. +0.24 MV d. +0.97 MV e. ?0.47 MV
What is a heat engine?
a. A machine that heats up as it does work. b. A machine that produces heat. c. A machine that destroys heat, cooling its surroundings. d. A machine that converts heat to work. e. A machine that transfers heat to surrounding cooler objects.
When a switch is closed to complete a DC series RL circuit,
a. the electric field in the wires increases to a maximum value. b. the magnetic field outside the wires increases to a maximum value. c. the rate of change of the electric and magnetic fields is greatest at the instant when the switch is closed. d. all of the above are true. e. only (a) and (c) above are true.