A 670 kg meteorite made up of mostly aluminum, approaches the Earth. The initial temperature of the meteorite is -15.0°C and moves with a speed of 14.0km/s. When the meteorite collides with the Earth, half of its energy goes to Earth while the rest causes an increase in the internal energy of the meteorite which causes a momentary elevation of its temperature. Determine the final temperature of the meteorite if all the aluminum turns into gas. Assume the specific heat capacity for the liquid and gaseous aluminum is 1.17 X103J/kg* oC.

A small metal cube with a thermal mass mc and an initial temperature 0 is dropped into a container of water that is actively maintained at a constant temperature 0w. The cube quickly comes to rest on the bottom surface of the container. The bottom surface is maintained at a constant temperature 0 (note that this is different from 0w). The thermal resistance between the cube and the water is Rcw while the thermal resistance between the bottom surface of the container and the cube is RCB. The temperature of the cube is denoted by 0c. a) Draw the system schematic indicating the assumed directions of the heat transfer rates. Label all the nodes and system parameters. b) Derive the governing equation for the temperature of the cube, 0c. c) Where does to appear in the system schematic and how does it affect the governing equations? d) Calculate the steady-state temperature of the cube, css, assuming the following system parameters: 0o = 21°C, 0B = 6°C, 0w = 0°C, Rcw = 2°C/W, and RCB = 4°C/W

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When perspiration on the human body absorbs heat, some of the perspiration turns into water  vapor. The latent heat of vaporization at body temperature (37 °C) is 2.42 x 106 J/kg. The heat  absorbed is approximately equal to the average energy E given to a single water molecule  (H2O). a) What´s E? b) What´s the average velocity of the single water molecules?