Auniform rod of length l oscillates as a pendulum about a pivot that is a distance x from the center. what is the minimum oscillation period of a 15kg, 4.0m long steel bar?

What are the similarities & differences between a thermistor and a light dependent resistor in physics?

If you let go of the notebook after lifting it, will it move? how?

A980-kg sports car collides into the rear end of a 2300-kg suv stopped at a red light. the bumpers lock, the brakes are locked, and the two cars skid forward 2.6m before stopping. the police officer, estimating the coefficient of kinetic friction between tires and road to be 0.80, calculates the speed of the sports car at impact. what was that speed?