The answer is C I believe.
Answer: During a collision there is a change in momentum The force of the collision is equal to the rate of change of momentum
Explanation: going 80 mph down a road and get hit head on by another car going 80 mph you will reach impact at about 160 mph.
Answer:
Q = PV(In 4)
Explanation:
We are told that the volume expands from V to a state with volume 4V.
Thus, initial volume is V and Final volume is 4V.
We want to find How much heat is added to the expanding gas.
For an isothermal process, the work done is calculated from;
W = nRT(In(V_f/V_i))
Where;
V_f is final volume
V_i is initial volume
Thus;
W = nRT(In(4V/V))
W = nRT(In 4)
Now, from ideal gas equation, we know that;
PV = nRT
Thus;
W = PV(In 4)
Now from first law of thermodynamics, we know that internal energy is zero and thus; Q = W
Where Q is quantity of heat
Thus;
Q = PV(In 4)
Answer:
38
Explanation:
because the law of reflection states angle of incidence is equal to the angle of reflection
Answer:
The rate at which it will radiate heat is closest to 127.2J.
Explanation:
According to Stefan's law, the heat radiated by a black body can be written as:
is directly proprtional to the 
.
where H is the amount of heat radiated and T is the surface temperature .
<u>Example</u> : The heat is transferred by radiation and an example of heat transferred by radiation is the sunlight reaching earth from sun.
<u>Note</u> : Here the temperature is expressed in Kelvin.
- Initial rate of heat ,
- Final rate of heat ,
= unknown
- Initial temperature ,
- Final temperature ,
.
The rate at which it will radiate heat is closest to 127.2J.
