The specific heat capacity of copper is 400j/kg/k. A piece if copper ball of mass 20g at 200 degrees Celcius is placed in a copper calorimeter of mass 60g containing 50g of water at 30degrees Celcius, ignoring heat losses, calculate the final steady temperature of the mixture. (Specific heat capacity of water =4.2j/g/k)

Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?

During which interval are the persons represented by the graph not moving? a) 0 to 0.5 hrs b) 1.5 to 2 hrs c) 2 to 2.5 hrs d) 4.5 to 5 hrs

What is a costume plot? why is it important to a film or theater production?