a fan uses 150j of mechanical energy, 20j of heat and 75j of sound energy
a) what is the total input energy
b) what is the total useful output energy
c)what is the total wasted energy
d) what is the energy efficiency
e) what percent of the energy was wasted
To answer these questions, we need to understand the concept of energy and its different forms.
Energy can exist in various forms such as mechanical, heat, sound, electrical, etc. In this case, we are given the amounts of mechanical energy (150J), heat energy (20J), and sound energy (75J).
a) To find the total input energy, we need to add up the amounts of each type of energy:
Total Input Energy = Mechanical Energy + Heat Energy + Sound Energy
Total Input Energy = 150J + 20J + 75J
Total Input Energy = 245J
b) The total useful output energy refers to the energy that is genuinely utilized for the intended purpose. In this case, we are not given any information about the useful output energy, so we cannot determine its value.
c) The total wasted energy represents the energy that is not utilized for the intended purpose or is lost due to inefficiencies:
Total Wasted Energy = Total Input Energy - Total Useful Output Energy
Since we don't have the value for the total useful output energy, we cannot determine the total wasted energy at this point.
d) Energy efficiency is a measure of how effectively input energy is converted into useful output energy. It can be calculated using the following formula:
Energy Efficiency = (Total Useful Output Energy / Total Input Energy) * 100%
Since we don't have the value for the total useful output energy, we cannot determine the energy efficiency at this point.
e) The percentage of energy that was wasted can be calculated by dividing the total wasted energy by the total input energy and then multiplying by 100%:
Percentage of Energy Wasted = (Total Wasted Energy / Total Input Energy) * 100%
Again, since we don't have the value for the total wasted energy, we cannot determine the percentage of energy wasted at this point.
To fully answer questions b), c), d), and e), we need additional information about the total useful output energy or the total wasted energy.