What is the approximate range in latitude over which sunspots appear?
What will be an ideal response?
Sunspots appear over a range of 40°N latitude to 40°S latitude.
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In a heat pump,
a. heat is used to do work. b. heat flows spontaneously. c. the same process is used as in a heat engine. d. work is used to transfer heat.
What is the peak (maximum) power dissipated by a 150 W light bulb attached to a 120 V rms ac line?
A. 301 W B. 212 W C. 150 W D. 106 W E. 75.0 W
A speedy tortoise can run with a velocity of 10.0 cm/s and a hare can run 20.0 times as fast. In a race, they both start at the same time, but the hare stops to rest for 2.00 minutes. The tortoise wins by a shell (20.0 cm). What was the length of the race?
Two moles of an ideal gas are placed in a container of adjustable volume. When measurements are made
a. the pressure is inversely proportional to the volume at constant temperature. b. the temperature is directly proportional to the volume at constant pressure. c. the temperature is directly proportional to the pressure at constant volume. d. all the statements above are found to be correct. e. only statements (a) and (b) are found to be correct.