Assume that the effective temperature of the sun is 5780k; the radius of the sun is r= 6.96 x 100 cm; and the radius of the earth is 6360 km. (a) (3 points) calculate the bolometric solar flux at 1 au from the sun. (b) (3 points) the average albedo of the earth is about 0.3, meaning that it reflects bạck into space 30% of the radiation hitting it. work out the total amount of solar rakliation absorbed by the earth every second. (c) (3 points) assuming that the the earth behaves as a blackbody, find the equilib- rium temperature to at which it will radiate energy at the same rate it absorbs it. (d) (1 point) what environmental effect is responsible for raising earth's average tem- perature (~288 k) above the te value you have calculated?

How can you increase the strength of an electromagnet?

An charge with mass m and charge q is emitted from the origin, (x,y)=(0,0). a large, flat screen is located at x=l. there is a target on the screen at y position y(h), where y(h) > 0. in this problem, you will examine two different ways that the charge might hit the target. ignore gravity in this problem. 1.assume that the charge is emitted with velocity v(0) in the positive x direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive y direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l. 2.now assume that the charge is emitted with velocity v(0) in the positive y direction. between the origin and the screen, the charge travels through a constant electric field pointing in the positive x direction. what should the magnitude e of the electric field be if the charge is to hit the target on the screen? express your answer in terms of m, q, y(h), v(0), and l.

Abird flies directly overhead from where you stand at an altitude of 300.0 m and at a speed horizontal to the ground of 20.0 m/s. the bird has a mass of 2.0 kg. the radius vector to the bird makes an angle \thetaθ with respect to the ground. the radius vector to the bird and its momentum vector lie in the xyxy-plane. what is the bird’s angular momentum about the point where you are standing?