Ask a New Question

Question

a 4.5kw electric motor is 90% efficient.how much energy it use in 20 seconds.
11 years ago

Answers

ajay
12 minutes
11 years ago
ajay
13 minutes
11 years ago
Elena
E=Pt/η=4500•20/0.9=100000 J =0.1 MJ
11 years ago
Dump of Death
100KJ
9 years ago
usman
90kj
5 years ago
MaxYeng
4.5kW = 90%
5.0kW = 100%

W= 5000W x 20
= 100000J @ 100kJ
5 years ago

Related Questions

A 280 electric motor is 90% efficient, meaning that 90% of the energy supplied to it ends up as mec... an electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the... An electric motor is used to pull a 125 kg box across a floor using a long cable. the tension in the... a 1.00 x 10 W electric motor is used to life a 955 kg object vertically 25.0 m at a constant velocit... An electric motor is used to lift a load of bricks through a vertical height of 20m.the tension in t... In an electric motor, at the moment that the half-turn of the rotor (central electromagnet) complete... If an electric motor uses 50 kJ of energy to do 46 kJ of work, how efficient is it? If an electric motor uses 50 kJ of energy to do 46 kJ of work, how efficient is it?
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use