The label on a candy bar says 557calories. assume an efficiency for energy use by the body of 0.25, if a 60kg person were to use the energy in this candy bar to climb stairs, how high could they go?

2. they have negligible mass.

The objects do not reach terminal velocity         there is not enough time from the time the object falls from when it hits the ground to achieve terminal velocity. an object must be placed higher to achieve terminal velocity in order to be in free fall.

The answer is a) taiga because taigas are cold

Honestly "global warming" may be a slight possiblity, however they called it "climate change" because its not real, in fact we had one of our coldest days here not too long ago, and the "issues" with this subject is a blindfold for actual problems.