taylaxox taylaxox
  • 22-09-2019
  • Physics
contestada

the useful power out of an electric motor is 20w and the total power into the motor is 80w calculate the percentage efficiency of the motor

Respuesta :

MathPhys
MathPhys MathPhys
  • 22-09-2019

Answer:

25%

Explanation:

Efficiency is the ratio of power out to power in.

e = 20 W / 80 W

e = 0.25

The motor is 25% efficient.

Answer Link

Otras preguntas

What different peoples contributed to the cultures of Spain and Portugalit has to be five different peoples
Round 1.069 to the nearest tenth
true or false questions basic math 1.the total surface area of a cube each of whose edges is 12 inches long is 6 square feet 2.if the tank in a car holds 15 gal
Collect information about working of geyser and prepare a report
the total cost of 3 tables & 2 chairs is rs 1850 ...if a table RS 75 more than a chair ,find the price of each ?
Find the 6th term in the expanded form of the equation (2x+y)^9
true or false questions basic math 1.the total surface area of a cube each of whose edges is 12 inches long is 6 square feet 2.if the tank in a car holds 15 gal
What different peoples contributed to the cultures of Spain and Portugalit has to be five different peoples
what does 'secret, black and midnight hags' mean in shakespeare?
what is 12.345 rounded to the nearest tenth