In 1980, over San Francisco Bay, a large yo-yo was released from a crane. Suppose the yo-yo was 108 kg, and it consisted of two uniform disks of radius 40.0 cm connected by an axle of radius 4.00 cm. What was the magnitude of the acceleration of the yo-yo during (a) its fall and (b) its rise

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

Give one example to show that when substances are mixed, it may result in a chemical or a physical change depending on the conditions.

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?