Physics Answers

A brass telephone wire has essentially no sag between poles 35.0 m apart on a cold day when the temperature is -20.0°C. How much longer is the wire on a summer day when the temperature is 35.0°C? If we change the kind of wire copper, how much longer is it during summer? Which is longer?

Find the value of the point charge with an electric field of 12 N/C and a distance 3.3 m

Solve for the Electric field of a point charge q, with a value of 2.9 nC and a distance of 2.4 m

Find the charge of a test charge with an electric field of 6.0 x 10⁻⁶ N/C and a force of 0.25 N

2 charged particles reacted with a force of 0.31 N with a distance of 1.5 cm, the 2nd charge contains 54 nC. Find the value of the first charge.

1 decibel at 500 nm is 100 W, what is the number of watts at 550 nm?

If a Saturn V rocket with an Apollo spacecraft attached had a combined mass of 3.1 × 10⁵ kg and reached a speed of 11 km/s, how much kinetic energy would it then have?

The only force acting on a 2.8 kg canister that is moving in an xy plane has a magnitude of 5.8 N. The canister initially has a velocity of 4.4 m/s in the positive x direction, and some time later has a velocity of 6.7 m/s in the positive y direction. How much work is done on the canister by the 5.8 N force during this time?

A 55000.kg truck rounds a 38.0 m radius curve at 62.0km/h. Find how much centripetal force must be supplied by friction with the road to keep the truck from from slipping

How many seconds would it take for a 4.50kW motor to raise a 175.kg boiler to a height of 15.0 m?