Question

Help would be appreciated!

1.) A lorry contains an engine with a power of 42,000W. The lorry drives for 15 seconds.
Calculate the energy transferred.
2.) A student investigates an immersion heater of power 35W.
Calculate the work done by the immersion heater if it is left on for 700 s.
3.) How far can a motor of power 2.5kW pull a weight of 39N in 100s?
Assume no energy is needed to overcome friction.
4.) A power station has efficiency 0.85.
How much electricity is generated from 5000J of fuel?

Answer 1

In mathematics, the Pythagorean theorem, or Pythagoras's theorem, is a fundamental relation in Euclidean geometry among the three sides of a right triangle. It states that the area of the square whose side is the hypotenuse is equal to the sum of the areas of the squares on the other two sides.