how many days does it take a perfect black body cube of 0.01m on a side at 30degree to radiate the same amount of energy that 100watts light bulb uses in one hour​

Avoltaic cell converts chemical energy to

If state law mandates that elevators cannot accelerate more than 2.40 m/s2 or travel faster than 14.8 m/s , what is the minimum time in which an elevator can travel the 373 m from the ground floor to the observatory floor? ?

A10-kg isto a of 10 m at aa0.9 kg/m.30 kg of ,at aas10-m .. ( 9.8 m/s2 g.)