A car is moving about a circular track of radius 25 m with a speed of 30 m/s, what is the centripetal acceleration of the car? a 30 m/sec. sg b 36 m/sec. sa c 72 m/sec. sg d 6 m/sec. sa​

How do we measure or think of speed in the united states?

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.

2) the sun is wonderful source of energy. it is renewable and natural with few dangers. solar cells rely on the sun for energy. these cells would be more practical to use if they were