Show us what you have done so far. For starters, how much work does the engine have to do? (hint: that is the output).efren17 said:Homework Statement
HELP with physics homework, thermal energy?
I cannot figure out how to solve this problem, can someone show me how?
A small engine pumps 100 liters of water from a well 300m deep. What would the change in temperature be for the engine 20 liter cooling system (filled with methanol) if the engines efficiency is 54%
Specific heat of water 4180, and of methanol 2450
density of water 1kg= L
Homework Equations
The Attempt at a Solution
Thermal energy is the total kinetic energy of all the particles in a substance. It can change when heat is added or removed from a system, causing the particles to either speed up or slow down.
The change of thermal energy directly affects the temperature of a substance. When heat is added, the particles gain energy and the temperature increases. When heat is removed, the particles lose energy and the temperature decreases.
The amount of heat added or removed, the type of substance, and the mass of the substance can all affect the change in thermal energy. Other factors such as pressure, volume, and phase changes can also impact thermal energy.
Heat is the transfer of thermal energy from a higher temperature object to a lower temperature object. Thermal energy is the total amount of kinetic energy in a substance. Heat can cause a change in thermal energy, but they are not the same thing.
The change of thermal energy can be measured using units of energy, such as joules or calories. It can also be measured indirectly by changes in temperature using units of heat, such as BTUs or joules per degree Celsius.