The intensity of sunlight at the earth surface is about 1000wlm2. the average temperature of the earth is about 58â° f. what must be the emissivity of the earth be?

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Who was the first scientist to measure speed as distance over time?

Aball is thrown from the top of a building with an initial velocity of 21.9 m/s straight upward, at an initial height of 51.6 m above the ground. the ball just misses the edge of the roof on its way down, as shown in the figure. (a) determine the time needed for the ball to reach its maximum height. (b) determine the maximum height. (c) determine the time needed for the ball to return to the height from which it was thrown, and the velocity of the ball at that instant. (d) determine the time needed for the ball to reach the ground. (e) determine the velocity and position of the ball at t = 5.35 s.