If a spring has a natural length of 5 cm and a force of 30 n is required to maintain the spring stretched to a length of 9 cm, find the spring constant.

A car is traveling at a speed of 39.2m/s on an interstate highway where the speed limit is 65.0mi/h. Is the driver exceeding the speed limit? YesNo Justify your answer.

A force of 40 N is applied on a body so that it attains a velocity of 20 m/s in 5 s. What is the mass of the body?

Does the speed of a sound wave ever change in a gas? What is the speed of a sound wave?

A blow dryer transfers thermal energy mainly by what

What three factors does a wire depend on

A Car is lifted a certain distance in a service station and therefore has potential energy relative to the floor. if it was lifted twice as high, how much potential energy would it have?

How long does it take a 750-w coffeepot to bring to a boil 0.75 l of water initially at 11°c? assume that the part of the pot which is heated with the water is made of 280 g of aluminum, and that no water boils away?

An electric motor rotating a workshop grinding wheel at a rate of 151 rev/min is switched off. Assume constant angular deceleration of magnitude 2.23 rad/s 2. Through how many revolutions does the wheel turn before it finally comes to rest

1. What is the atomic number of an atom? Why is this number important? |

The car travels down the road at 60mph for 1.5 hours. How far does it go?