A man was out snowboarding and notices what when he touches the metal part of chair lift it feels colder than the rubber seat. Are the two the same temperature? Explain using appropriate terms from the energy unit!

#7 The AC can be run backwards and used as a heat pump during cool houston mornings in the months September-November, and February-April. Suppose that the outside is 40 degrees F and the inside temperature is to be maintained at 70 degrees F. What is the minimum electrical work that must be performed on the compression for every kJ of heat liberated in the house?

Which would cause a more serious burn: 30 g of steam or 30 g of liquid water, both at 100 °C; and why is this so? O Water, because its specific heat is greater than that of steam. O Steam, because of its specific heat capacity. O Water, because it is denser than steam. O Steam, because of its latent heat of vaporization. O Either one would cause a burn of the same severity since they are both at the same temperature.