Savita throws a ball horizontally with a velocity of 8ms-1 from the top of her building .The ball strikes to her brother Sudhir playing at 12 m away from the building. the height of building is

An incident ray through the focal point of a spherical mirror will: reflect through the center of curvature. reflect back through the focal point. reflect parallel to the principle axis. reflect the same direction as the incident ray.

The solar panels used by mark function because of the photoelectric effect. light shines on the cells causing electrons to be ejected from the metal, which produces an electric current. at night on mars, no light will fall on the solar cells and no electric current will be generated. according to your notes, what type of light is typically needed to cause the photoelectric effect? a)visible b)ultraviolet c)infrared

If a balloon is taken outside on a very cold day, what will occur?