Ablock of mass 20 kg sits on a ramp with an angle of 31 degrees above the horizontal. assuming no friction, how fast will the block accelerate down the ramp?

7.89 m/s^2
5.34 m/s^2
2.98 m/s^2
4.17 m/s^2

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