The Sun radiates energy at a rate of 3.86 × 1026 W. Its radius is 7.0 × 108 m. If the distance from the Earth to the Sun is 1.5 × 1011 m, what is the intensity of solar radiation at the top of the Earth's atmosphere?
What will be an ideal response?
W/m2You might also like to view...
The observed relationship of 1/500 between the masses of central black holes and the bulge masses of galaxies implies that
A) the black hole will eventually suck in the rest of the galaxy. B) galaxy formation and supermassive black hole formation must be related somehow. C) the biggest galaxies have the most luminous quasars. D) quasars were more common 10 billion years ago than they are today.
A block is supported on a compressed spring, which projects the block straight up in the air at velocity 
. The spring and ledge it sits on then retract. You can win a prize by hitting the block with a ball. When should you throw the ball and in what direction to be sure the ball hits the block? (Assume the ball can reach the block before the block reaches the ground and that the ball is thrown from a height equal to the release position of the block.)
A. At the instant when the block leaves the spring, directed at the block B. At the instant when the block leaves the spring, directed at the spring C. At the instant when the block is at the highest point, directed at the block D. At the instant when the block is at the highest point, directed at the spring E. When the block is back at the spring's original position, directed at that position
A figure skater rotating at 5.00 rad/s with arms extended has a moment of inertia of 2.25 kg ? m2. If he pulls in his arms so his moment of inertia decreases to 1.80 kg ? m2, what will be his new angular speed?
A) 2.25 rad/s B) 4.60 rad/s C) 6.25 rad/s D) 0.81 rad/s
How many turns should a 10-cm long solenoid have if it is to generate a 1.5 × 10-3 T magnetic field on 1.0 A of current?
A) 12 B) 15 C) 120 D) 1200 E) 3200