Suppose you are facing north and you see the Big Dipper close to your northern horizon, with Polaris (and the Little Dipper) above it. Where will you see the Big Dipper in six hours?
A) still in the same place, below Polaris
B) to the left of Polaris; that is, 90 degrees clockwise from its current position
C) directly above Polaris
D) to the right of Polaris; that is, 90 degrees counterclockwise from its current position
D
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A gas is allowed to expand at constant pressure as heat is added to it. This process is
A) isothermal. B) adiabatic. C) isobaric. D) isometric. E) isentropic.
Transverse waves are traveling on a 1.00-m long piano string at 500 m/s. If the points of zero vibration occur at one-half wavelength (where the string is fastened at both ends), find the frequency of vibration
a. 250 Hz b. 500 Hz c. 1 000 Hz d. 2 000 Hz e. 2 500 Hz
A student designs a clock using a mass and a spring. Each oscillation of the mass advances the clock by one second. When the student builds the clock, he discovers he erred and each oscillation takes two seconds
What change can he make to fix the clock? A) double the amplitude of the oscillations B) quadruple the spring constant of the spring C) double the spring constant of the spring D) quadruple the mass E) double the mass
When a capacitor is fully charged, the current through the capacitor in a direct-current circuit is
a. zero. b. at its maximum value. c. equal to the current in a resistive circuit in parallel with the capacitor circuit. d. greater than the current in a resistor that is farther from the battery than the capacitor. e. zero if it is the only capacitor, but maximum if there is another capacitor in series with it.