Microwaves are electromagnetic waves used in broadcasting and telecommunications. When do these wave OA.
when the source moves away from you
OB
when the source moves toward you
O C.
when you move away from the source
OD
when you move away from the source and the source moves away from you
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Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.

Using the free-body diagram, calculate the net force acting on the sled. is the sled in a state of dynamic equilibrium?