• Support PF! Buy your school textbooks, materials and every day products Here!

Change of thermal energy

  • Thread starter efren17
  • Start date
  • #1
1
0

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

 

Answers and Replies

  • #2
Andrew Mason
Science Advisor
Homework Helper
7,603
354

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

Show us what you have done so far. For starters, how much work does the engine have to do? (hint: that is the output).

AM
 

Related Threads on Change of thermal energy

  • Last Post
Replies
1
Views
3K
  • Last Post
Replies
3
Views
2K
  • Last Post
Replies
6
Views
8K
  • Last Post
Replies
0
Views
1K
  • Last Post
Replies
3
Views
2K
Replies
0
Views
2K
Replies
6
Views
642
Replies
1
Views
1K
Replies
2
Views
654
Replies
2
Views
1K
Top