An aerobatic airplane pilot experiences

weightlessness as she passes over the top of

a loop-the-loop maneuver.

The acceleration of gravity is 9.8 m/s^2

If her speed is 440 m/s at this time, find the

radius of the loop.

Answer in units of km.

Water has a heat capacity of 4,184 J/kg*C. You have 2kg of water at a temperature of 98C. You want to raise the temperature to 100C. How much energy is needed to do this? 4,184J 16,736J 12,334J 9,445J

If electric lights are an accurate gauge of electricity usage, what areas use the most electricity?

Two straight wires are in parallel and carry electrical currents in opposite directions with the same magnitude of 2.0A. The distance between the two wires 5.0 m m. If one of the wires is infinitely long and the other the wire is 0.

Peter and Tom shared the driving on a certain trip. If Peter and Tom both drove for the same amount of time, but Peter only drove / small / frac{2}{5} of the total distance, what was the ratio of Peter's average speed to Tom's average speed?

How electric bell works short answer

If a spacecraft that seems to be motionless in deep space is given some type of quick push, what will happen? A. The spacecraft will not move because it only works on earth. B.

A fast, white water cascade is also known as what?

What is a stack of membranes that packages chemicals

Under what condition (s) will an object be in equilibrium? Notice that equilibrium in physics has a broader definition. (A) Only if it is moving with constant velocity. (B) Only if it is at rest.

If a pressure gauge measure an increase in 3*10^ (5) Pa on an area of 0.7 m^2, calculate the increase in the force applied to the area?