A small mass of 0.2kg is weld round in a horizontal circle at the end of the stream of length 0.5m at a constant angular speed of 4radius per sec calculate the angular speed of the object

When an object is heated it contracts. a. true b. false

Why should seat belts not be mandatory quick plz

In a heat engine if 1000 j of heat enters the system and the piston does 500j of work, what is the final internal energy of the system if the inital energy was 2000 j1.write the equation2.list out your known variables 3. plug the numbers into the equations4.solve 5.write your solution statement that includes initial energy and final energy added.