4. As noted in the preceding example, the Sun delivers about 1 000 W/m² of energy to theEarth's surface via electromagnetic radiation. (a) Calculate the total power that is incident on aroof of dimensions 8.00 m ×20.0 m. (b) Determine the radiation pressure and the radiation forceexerted on the roof, assuming that the roof covering is a perfect absorber.

Q: A car goes 50mile north and 50 miles east and 40miles south. It takes half an hour to complete the j...

A: Click to see the answer

Q: Help with a.

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Q: Explain why a spinning cricket ball in air does not follow a parabolic trajectory.

A: A circket ball moves simultaneously in two motions ,they are rotatory motion and linear motion

Q: Why hot water bottles are used for fomentation?

A: Hot water has high specific heat capacity. Due to this, the water remains hot for a longer duration.

Q: A simple camera telephoto lens consists of two lenses. The objective lens has a focal length f1 = +4...

A: The image from the first lens will act as the object of the second.The distance to the image from th...

Q: A particle is moving in a straight line with uniform acceleration -5m/s2 and initial velocity 12.5m/...

A: the  distance travelled for particle in uiform motion is, 

Q: A man is sitting in a train in motion is facing the engine. He tosses a coin up, the coin falls behi...

A: A man is sitting in a train in motion is facing the engine. The coin falls behind him when he tosses...

Q: Two point charges, Q1 = 3.0 μC and Q2 = -2.2 μC , are placed on the x axis. Suppose that Q2 is place...

A: Write the expression for electric filed due to the point charges.

Q: Do water and ice have same specific heats?

A: The specific heat capacity is the amount of heat energy desired to increase the temperature of a sub...