A 60-W and a 100-W light bulb are connected in parallel to a 120-V outlet. Which bulb draws more current?
A) 60-W bulb
B) 100-W bulb
C) both the same.
Answer: B
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If two balls are thrown from the same cliff with the same speed, one up, one down, when they touch the ground, they should:
a. have different speed b. the same speed c. touch the ground in the same time d. travel the same distance in the air e. none of above
Energy Conservation With Conservative Forces: Assuming negligible friction, what spring constant (force constant) would be needed by the spring in a "B-B gun" to fire a 10-g pellet to a height of 100 m if the spring is initially compressed by 0.10 m?
A. 20 N/cm B. 20 N/m C. 200 N/m D. 2000 N/cm E. 0.0020 N/m
Water flows over a waterfall that is 20 m high at the rate of 4.0 × 104 kg/s. If this water powers an electric generator with a 40% efficiency, how many watts of electric power can be supplied?
What will be an ideal response?
Elliptical galaxies contain only Population ________ stars and little gas and dust
Fill in the blank(s) with correct word