. Calculate the time take and the distance covered by a train moving with a velocity of 15 m/s to accelerate uniformly at the rate of 2 m/s^2 to reach a velocity of 20 m/s.

Listed following are various physical situations that describe how light interacts with matter. match these to the appropriate category. 1) transmission? -visible light meets clear glass -visible light does not pass through a black wall -red light hits a red sweatshirt -light comes from your computer screen -cell phone signals pass through walls -blue light hits a red sweatshirt -white light hits a white piece of paper -light comes from a light bulb