Does heating a metal wire increase or decrease its electrical resistance? why?

We found the centripetal acceleration of the earth as it revolves around the sun. compute the centripetal acceleration of a point on the surface of the earth at the equator caused by the rotation of the earth about its axis. (enter the magnitude. the radius of the earth is 6,371 km.)

Debbie places two shopping carts in a cart corral she pushes the first cart which then pushes a second cart what force is being exerted

Because light travels in a straight line and casts a shadow, isaac newton hypothesized that light is