Compared to the spirals, elliptical galaxies tend to be more dusty
Indicate whether the statement is true or false
FALSE
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Starship "Alpha" travels at 0.9c past an identical starship "Beta," which is at rest. Both a cabin boy on the "Alpha" and a cook on the "Beta" measure the time required for the other ship to pass by their respective windows. Who measures the longer time?
A. The cabin boy B. Both measure the same time C. The measured times cannot be compared D. The cook
Earth's rotation causes a person at the North Pole to ________ relative to the center of the Earth.
A) move at a speed of about 1670 km/hr B) spin in place once each year C) remain completely stationary D) spin in place once each day
A 20-?F capacitor is attached across a 1 000-V power supply. What is the net charge on the capacitor?
a. 10 mC b. 20 mC c. 40 mC d. none of the above
Two circular loops are side by side and lie in the xy-plane. A switch is closed, starting a counterclockwise current in the left-hand loop, as viewed from a point on the positive z-axis passing through the center of the loop. Which of the following statements is true of the right-hand loop?
1.The current remains zero. 2.An induced current moves counterclockwise. 3.An induced current moves clockwise.