Following vigorous exercise, the body temperature of an 80.0-kg person is 40.0ºC . At what rate in watts must the person transfer thermal energy to reduce the the body temperature to 37.0ºC in 30.0 min, assuming the body continues to produce energy at the rate of 150 W?    ⎝1 watt = 1 joule/second or 1 W = 1 J/s ⎞

A 0.250-kg aluminum bowl holding 0.800 kg of soup at 25.0°C is placed in a freezer. What is the final temperature if 430 kJ of energy is transferred from the bowl and soup? Assume the soup has the same thermal properties as that of water, the specific heat of the liquid soup is 1.00 kcal/(kg · °C), frozen soup is 0.500 kcal/(kg · °C), and the latent heat of fusion is 79.8 kcal/kg. The specific heat of aluminum is 0.215 kcal/(kg · °C).

A sphere of surface area 1.25 m² and emissivity 1.0 is at a temperature of 100°C. At what rate does it radiate heat into empty space? (o = 5.67 × 10-8 W/m2.K4) O 3.7 W O 0.71 mW O 1.4 kW O 7.1 W O 9.9 mW

Large meteors sometimes strike the Earth, converting most of their kinetic energy into thermal energy. If a 10° kg meteor moving at 25.0 km/s lands in a deep ocean and 80% of its kinetic energy goes into heating water, how many kilograms of water could it raise by 5.0°C? Select the correct answer O 8 x 1012 kg O 5 x 1013 kg O 1 x 1013 kg O 4 x 1012 kg. Your Answer O 2 x 1013 kg

A cup of hot coffee sits on your desk. Assume that the thermal energy in the coffee can be converted with an efficiency of 100%% to gravitational potential energy of the coffee-Earth system-enough so that the coffee rises up above the rim of the cup. Let the height of the coffee rise by 3.4 cm. Find the magnitude of the drop in temperature needed to accomplish this energy conversion. Use c = 4180 J/kg⋅C for coffee.

When it rains, water vapor in the air condenses into liquid water, and energy is released. (a) How much energy is released when 0.0356 m (1.40 inch) of rain falls over an area of 2.59×106 m² (one square mile)? (b) If the average energy needed to heat one home for a year is 1.50x10¹1 J, how many homes could be heated for a year with the energy determined in part (a)? (a) Number i (b) Number 1 Units Units

Under many conditions, the center of mass of a system of particles can represent the system as a whole. But how far does this rule extend? Consider two identical particles traveling toward each other at the same speed. By examining this system, choose the correct response. 1)The momentum and kinetic energy of the center of mass is equivalent to that of the system of particles. 2)The kinetic energy, but not the momentum, of the center of mass is equivalent to that of the system of particles. 3)Neither the momentum nor the kinetic energy of the center of mass is equivalent to that of the system of particles. 4)The momentum, but not the kinetic energy, of the center of mass, is equivalent to that of the system of particles.

A styrofoam container used as a picnic cooler contains a block of ice at 0°C. If 564 g of ice melts in 1 hour, how much heat energy per second is passing through the walls of the container? The heat of fusion of ice is 3.33 x 10° J/kg. Answer in units of W.

21.0 g of copper pellets are removed from a 300C oven and immediately dropped into 70.0 mL of water at 17.0C in an insulated cup. copper = 385 (J/kg K) water = 4190 (J/kg K) What will the new water temperature be? Express your answer with the appropriate units.

Problem 4. (a) How much heat transfer is necessary to raise the temperature of 0.800kg of water from 0°C to 30.0°C? (b) How much heat transfer is required to first melt 0.800kg of 0°C ice and then raise its temperature to 30.0°C? Hint: Look up the specific heat and heat of fusion of water.