Which of these changes will increase the energy loss of a building?(1 point) Responses an increase in temperature difference between the inside and outside of the building an increase in temperature difference between the inside and outside of the building an increase in the R-value for the insulation materials used in the building an increase in the R-value for the insulation materials used in the building a decrease in the energy flux (W/m2) of the building a decrease in the energy flux (W/m 2 ) of the building a decrease in the temperature of the outside of the building
3 answers
An increase in temperature difference between the inside and outside of the building will increase the energy loss of a building.
In a closed system consisting of a cannon and a cannonball, the kinetic energy of a cannon is 72,000 J. If the cannonball is 18 kg and has a velocity of 23 m/s when fired from the cannon, what is the total kinetic energy of the system?(1 point) Responses 76,761 J 76,761 J 71,793 J 71,793 J 72,207 J 72,207 J 67,239 J
The total kinetic energy of the system can be calculated by summing up the kinetic energy of the cannon and the cannonball.
The kinetic energy of the cannonball can be calculated using the formula:
Kinetic energy = (1/2) * mass * velocity^2
Kinetic energy of the cannonball = (1/2) * 18 kg * (23 m/s)^2 = 11,997 J
To find the total kinetic energy of the system, we add the kinetic energy of the cannon to the kinetic energy of the cannonball:
Total kinetic energy = 72,000 J + 11,997 J = 83,997 J
Therefore, the total kinetic energy of the system is 83,997 J.
The kinetic energy of the cannonball can be calculated using the formula:
Kinetic energy = (1/2) * mass * velocity^2
Kinetic energy of the cannonball = (1/2) * 18 kg * (23 m/s)^2 = 11,997 J
To find the total kinetic energy of the system, we add the kinetic energy of the cannon to the kinetic energy of the cannonball:
Total kinetic energy = 72,000 J + 11,997 J = 83,997 J
Therefore, the total kinetic energy of the system is 83,997 J.
1 answer