A 0.15kg hockey puck is being pushed along frictionless ice by a stick. Its speed changes from 0.2 m/s to 2.54 m/s in 2.1 seconds. What is the acceleration of the puck in this time? What force does the stick exert on the puck?

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