The linear expansivity of a certain materials is 4.0 * 10 raise to power - 3 calculate the superficial expansivity of the material

Phase changes are chemical changes. true or false

What properties of a moving object are used in determining the object's energy of motion

1. jay fills a wagon with sand (about 20 kg) and pulls it with a rope 30 m along the beach. he holds the rope 25° above the horizontal. the rope exerts a 20-n tension force on the wagon. how much work does the rope do on the wagon?