The answer is closer to 0.
Answer:
28.7m
Explanation:
Given parameters;
Work done = 430J
Force applied = 15N
Unknown:
Distance moved = ?
Solution:
Work done is the force applied to move a body through a certain distance.
Work done = Force x distance
So;
430 = 15 x distance
Distance = 28.7m
Answer:
When the temperature of the gas is increased from 20 to 40, the pressure will be 2p
Explanation:
Given;
initial temperature of the gas, T₁ = 20 K
final temperature of the gas, T₂ = 40 k
initial pressure of the gas, P₁ = P
final pressure of the gas, P₂ = ?
Apply pressure law of gases;
Therefore, when the temperature of the gas is increased from 20 to 40, the pressure will be 2p
<span>We know the change of thermal energy is proportional to the specific heat of the matter, its mass and the change of temperatures, according the following formula:
Q = C*m*(Tf-Ti)
where:
Q is the heat added or removed (in joules, J)
C is the specific heat of the matter, in our case air 1,000 J/(Kg*C)
m is the mass, in our case 50 kg of air
Tf is final temperature
Ti is initial temperature
then:
Q = 1000 * 50 * (30-20) = 500,000 Joules
That means that 500,000 joules need to be added to increase temperature of the room 10 ÂşC (from 20 to 30 ÂşC)</span>
