A spring has a natural length of 20cm. If a 25-N force is required to keep it stretched to a length of 30 cm, how much work is required to stretch it from 20 cm to 25 cm?

How does a generator produce electrical energy? a. it converts chemical energy to electrical energy b. it converts mechanical energy to electrical energy c. it converts heat energy to electrical energy d.

Is it True or Flase that Materials that poor conductors are poor insulators?

What is the dimensional formula of pressure?

The number of different species in the biosphere or in a particular area is called

What is the most likely reason that a hypothesis would be useful even if experiments show that it is false? New hypotheses and experiments can be developed that better fit the observations made during the original experiments.

Ways that charges can be transferred

A cricketer can throw a ball to a maximum horizontal distance of 100m. How much high above the ground can he throw same ball

What is the relationship between the slope of the position graph of an object and its velocity?

Differeniate between thermal energy and heat

The term that describes the time when the sun's are directly over the equator is: