LET'S CHECK! Across
1. when an object takes in light
5. colors that white reflect
6. light is converted into this form of energy
when absorbed
8. presence of all colors
9. the color of an object that reflects green
Down
2. the color that means the absence of all colors
3. light bounces back upon hitting an object
4. colors reflected by black
7. the color of an object that absorbs all colors
except red​

Astone is dropped from a cliff and falls 9.44 meters. what is the speed of the stone when it reaches the ground? a. 13.6 m/sec b. 1.39 m/sec c. 185 m/sec d. 9.80 m/sec

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?

On a mild saturday morning while people are working inside, the furnace keeps the temperature inside the building at 23degreesc. at noon the furnace is turned off, and the people go home. the temperature outside is a constant 16degreesc for the rest of the afternoon. if the time constant for the building is 3 hr, when will the temperature inside the building reach 18degreesc? if some windows are left open and the time constant drops to 2 hr, when will the temperature inside reach 18degreesc?