Q1. A jeweller working with a heated 44 g gold ring must lower the ring's temperature to make it safe to handle. If the ring is initially at 94 degrees Celsius, what mass of water at 25 degrees Celsius is necessary to lower the ring's temperature to 35 degrees Celsius?
Q2. A clerk moves the box of cans down an aisle by pulling on a rope attached to the box. The clerk pulls with a force of 153 N at an angle of 25.0° with the horizontal. The box has a mass of 35.0 kg, and the coefficient of kinetic friction between box and floor is 0.450. Find an acceleration of the box.