Okeep yourself warm in the winter, you heat a solid metal ball and place it on a stand in the center of your room. the ball has a radius of 20.0 cm and an emissivity of 0.790. if your room has a temperature of 15°c, what is the net power radiated by the ball initially, when the ball's temperature is 200°c?

What are similarities and differences between refraction, reflection, diffraction and absorption?

What is the magnitude of the acceleration vector which causes a particle to move from velocity −5i−2j m/s to −6i+ 7j m/s in 8 seconds. answer in m/s.

Tafari worked one summer on a ship that set weather buoys in the ocean. he watched how one of the buoys moved in the water. describe which parts of the wave would cause the buoy to bob up and down. which wave property determined how fast the buoys bobbed in the water? he observed that when the wind blew harder, the ocean waves were larger, and the buoys moved away from the ship. what effect, if any, did the waves have on how far the buoys moved? explain your answer.