A 6.0 m * 8.0 m * 3.0 m room contains air at 20\deg C. What is the room's thermal energy

A solid cylindrical bar conducts heat at a rate of 25 W from a hot to a cold reservoir under steady state conditions. If both the length and the diameter of this bar are doubled, the rate at which it will conduct heat between these reservoirs will be O 12.5 W. O 200 W. O 100 W. O 25 W. O 50 W.

17.1 kg water in the pond turns to ice in that he 2. a). How much energy is given to your body when 0.4 kg of steam condenses on your skin? b). If the same amount of energy were used to warm 4 kg of water( which is ten times the amount of steam) initially at 0 deg Celsius, what would be the final temperature of the water in deg C and c) in deg F? * 3. The heat of vaporization of ethyl alcohol is 8.5 x 10^5 J/kg. If 2 kg of it od 07 were allowed to vaporize in a refrigerator, how much energy would be drawn from the air molecules? *

23.0 g of copper pellets are removed from a 300 degree celsius oven and immediately dropped i to a 80.0 mal of water at 20.0 celsius in an insulated cup.  What will the new water temperature be?    Please help! I can't figure this question out.

0 F2 W S 9. A 44.0-kg block of ice at 0°C is sliding on a horizontal surface. The initial speed of the ice is 7.80 m/s and the final speed is 4.00 m/s. Assume that the part of the block that melts has a very small mass and that all the heat generated by kinetic friction goes into the block of ice. Determine the mass of ice that melts into water at 0°C. grams #3 3 X 20 F3 E D ASA $ C 200 F4 R F er de % 5 V F5 T G MacBook Air B ... F6 Y & 7 H F7 U N CO * 8 J DIL F8 - M 9 K F9 O V O H F10 PEL 000 Р C I F11 + F12 ?

A 60.0-kg runner expends 359 W of power while running a marathon. Assuming 12.5% of the energy is delivered to the muscle tissue and that the excess energy is removed from the body by sweating, determine the volume of bodily fluid (assume it is water) lost per hour. (At 37.0°C the latent heat of vaporization of water is 2.41 ✕ 106 J/kg.) cm3

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A Styrofoam ice box has a total area of 0.950 m^2 and walls with an average thickness of 2.50 cm. The box contains ice, water, and canned beverages at 0 oC . The inside of the box is kept cold by melting ice. What is total amount of heat required to melt ice in one day if the ice box is kept in the trunk of a car at 35.0oC ?

hello, I need help please