A(n) 2.4-kg copper block is given an initial speed of 8.8 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. (a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in temperature

A rectangular glass window pane on a house has a width of 1.1 m, a height of 2.1 m, and a thickness of 0.48 cm. Find the energy transferred through the window by conduction in 12 hours on a day when the inside temperature of the house is 22°C and the outside temperature is 2.0°C. Take surface air layers into consideration.

A(n) 1.2-kg copper block is given an initial speed of 3.9 m/s on a rough horizontal surface. Because of friction, the block finally comes to rest. (a) If the block absorbs 85% of its initial kinetic energy as internal energy, calculate its increase in temperature. Incorrect: Your answer is incorrect. Your response differs significantly from the correct answer. Rework your solution from the beginning and check each step carefully.°C (b) What happens to the remaining energy?

(a) The inside of a hollow cylinder is maintained at a tem- perature T, and the outside is at a lower temperature, T, (Fig. P19.45). The wall of the cylinder has a thermal conduc- tivity k. Ignoring end effects, show that the rate of energy conduction from the inner surface to the outer surface in the radial direction is dQ dt = 2mLk [T.-T In(b/a) Suggestions: The temperature gradient is dT/dr. A radial energy current passes through a concentric cylinder of area 2TTL. (b) The passenger section of a jet airliner is in the shape of a cylindrical tube with a length of 35.0 m and an inner radius of 2.50 m. Its walls are lined with an insulat- ing material 6.00 cm in thickness and having a thermal conductivity of 4.00 x 10-5 cal/s cm - °C. A heater must maintain the interior temperature at 25.0°C while the out- side temperature is -35.0°C. What power must be supplied to the heater? L Figure P19.45