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
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.
To determine which change will increase the energy loss of a building, we need to understand the factors that contribute to energy loss. Energy loss in a building occurs primarily through heat transfer, which can be influenced by several factors.
1. Temperature difference between the inside and outside of the building: Increasing the temperature difference will lead to higher energy loss. Heat transfer occurs from areas of higher temperature to lower temperature, so a larger temperature difference will result in greater heat flow and energy loss.
2. R-value for insulation materials: The R-value represents the thermal resistance of insulation materials. Higher R-values indicate better insulation, meaning they impede the transfer of heat and decrease energy loss. Therefore, increasing the R-value of insulation materials will reduce energy loss, not increase it.
3. Energy flux (W/m2) of the building: Energy flux is the rate at which energy is transmitted per unit area. Decreasing the energy flux of the building would lower the amount of energy being transferred and consequently reduce energy loss.
4. Temperature of the outside of the building: Decreasing the temperature of the outside of the building can actually decrease energy loss. As the temperature difference decreases, so does the driving force for heat transfer, resulting in reduced energy loss.
Based on these factors, we can conclude that an increase in temperature difference between the inside and outside of the building will increase energy loss, while an increase in the R-value for insulation materials or a decrease in the energy flux of the building will decrease energy loss. Similarly, a decrease in the temperature of the outside of the building will also decrease energy loss.