At Point B the 100kg roller coaster car will have 3000 Joules of Kinetic energy. How much potential energy did the car have at Point A? Select one:
300 Joules
Not enough information
0 Joules
3000 Joules

Two technicians are discussing a resistance measurement between the can-h and can-l wires. technician a says this measurement should be done with the ignition switch in the "run" position. technician b states that a measurement of 0 ohms indicates an open in the network. which technician is correct?

Could someone . i have tried to solve myself but my calculation is off

Wavelength of 125 meters is moving at a speed of 10 m/s. what is it's frequency?