A G2V star would be the same temperature as a G2Ib star, but much smaller and less luminous
Indicate whether the statement is true or false
TRUE
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A battery is causing a large current in a solenoid (helical coil of wire). A bar magnet is held at rest nearby, aligned with the axis of the solenoid, with its south pole closest to the solenoid. The bar magnet is being repelled by the solenoid. Which of the following statements is true of the conventional current in the solenoid?
A. The current in the solenoid decreases B. The current in the solenoid is flowing clockwise as seen from the bar magnet C. The current in the solenoid is flowing counterclockwise as seen from the bar magnet D. The current in the solenoid increases E. The direction of the current in the solenoid alternates with a constant frequency
Linear momentum
a. has the units of mass times acceleration. b. has magnitude and direction. c. is a scalar quantity. d. none of these
Which of the following has the effect of reducing the gravitational force between two objects?
A) Increasing the mass of either one of the objects. B) Moving the two objects closer together. C) Both of the above. D) Moving the two objects farther apart. E) None of the above.
Photoelectric Effect: When the surface of a metal is exposed to blue light, electrons are emitted. If the intensity of the blue light is increased, which of the following things will also increase?
A. the number of electrons ejected per second B. the maximum kinetic energy of the ejected electrons C. the time lag between the onset of the absorption of light and the ejection of electrons D. the work function of the metal E. All of these