Hope it helps : )
Specific heat of air at constant pressure = 1.005KJ/kg-K Apparently the hot air leaves the house while equal quantity of the cool air passes inside (Neglecting the small specific volume changes between the hot and the cold air) So the situation can be sampled as a scenario where there is continuous draw down of the thermal energy from the air.
Energy has forms while work is done on an object when force is applied and the object covers distance
The correct answer is Nuclear Regulatory Commission (NRC)
NRC is the federal agency that is responsible for
1. nuclear power plant safety
2. transportation and storage of radioactive materials
3. Safe handling of the equipment and the plants
4. take care of licensing documents
The time taken by the sled to reach 45 m to the bottom is 4.24 s.
The sled's initial velocity <em>u</em> is zero. It has an acceleration <em>a</em> of a value 5 m/s² down the hill and it travels a distance <em>s</em> equal to 45 m down the hill.
Use the equation of motion,

Substitute 0 m/s for u and rewrite the equation for t.

The sled takes a time of 4.24 s to reach the bottom of the hill