The intensity of light from the Sun is 1.3 kW/m2 at the distance of the Earth. The Earth's radius is 6.4 × 10^6 m. If all the sunlight that hits the Earth were absorbed, what would be the magnitude of the resulting force on the Earth?
a. 0.0087 N b. 1.8 × 10^8 N
c. 5.6 × 10^8 N d. 87 N
c
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Assume a device is designed to obtain a large potential difference by first charging a bank of capacitors connected in parallel and then activating a switch arrangement that in effect disconnects the capacitors from the charging source and from each other and reconnects them all in a series arrangement. The group of charged capacitors is then discharged in series. What is the maximum potential
difference that can be obtained in this manner by using ten 500-µF capacitors and an 800-V charging source? 1.500 V 2.8.00 kV 3.400 kV 4.800 V 5.0
In the cores of the most massive stars, the electrons and protons fuse together and form neutrons
Indicate whether the statement is true or false
A 8.0-?F uncharged capacitor is connected in series with a 6.0-k? resistor, an ideal 20-V dc source, and an open switch. If the switch is closed at time t = 0.0 s, what is the charge on the capacitor at t = 9.0 ms?
A) 0 C B) 37% of the minimum charge C) 68% of the minimum charge D) 96% of the maximum charge E) 17% of the maximum charge
A 3.00 kg pendulum bob on a string 2.00 m long is released with a velocity of 2.00 m/s when the support string makes an angle of 45.0 degrees with the vertical. What is the tension in the string at the highest point of its motion?
A. 12.5 N B. 17.8 N C. 21.4 N D. 28.9 N E. 31.6 N