To remove a tight fitting lid from a jar, megan runs the lid under hot water. what happenes to the jar lid when its temperature increases? (a) the temperature increases, the lid expands (b) the potential energy decreases, and the lid expands (c) the potential energy increases, and the lid contracts (d) the temperature decreases, and the lid contracts

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

As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.

4. a 75.0 g piece of ag metal is heated to and dropped into 50.0 g of water at the final temperature of the mixture is what is the specific heat capacity of silver? 5. a 465 g chunk of iron is removed from petrucci, ralph h.. general chemistry (p. 290). pearson education. kindle edition.