Acar travels straight for 20 miles on a road that is 30 degrees north of east what is the east component of the cars displacement to the nearest tenth of a mile

Apiano tuner uses a tuner to create a tone of 5.00 x 10² hz. when a key on the piano is struck he hears 5 beats per second. what is a possible frequency of vibration for the piano string? 2500 hz 1300 hz 605 hz 495 hz

How are calculation for velocity and speed different

1700 j of energy is lost from 0.14 kg object , the temperature decreases from 50°c to 45°c what is the specific heat of this object, amd what is the material ?