Yes or no? do the following have co2 emissions?

coal
oil
natural gas
nuclear power
biofuel
hydropower
geothermal
wind energy
solar energy
hydrogen

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?

(**i would really appreciate if this was answered soon** ) which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

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?