An aluminium object with a mass of 4.97 kg and at a temperature of 26.8 °C comes to thermal contact with a 9.98 kg copper object which is initially at a temperature of 85.3 °C. What is going to be the equilibrum temperature of the two objects? Neglect heat transfer between the objects and the environment. The specific heats are: CAI =

A heavy pot made of copper has a mass of 2.24 kg (including the lid) and is heated in an oven to a temperature of 154 °C. You pour 0.12 kg of water at 26.0 °C into the pot and quickly close the lid so that no steam can escape. We assume that no heat is lost to the surrounding. For copper, Ccopper 390 J/(kg.K) For water, Cwater 4190 J/(kg.K), L, = 2256 kJ/kg, L; = 333 kJ/kg. %3D What is the final mass of steam in the pot? on

Before going in for an annual physical, a 70.0-kgkgperson whose body temperature is 37.0∘C Consumes an entire 0.355-literliter can of a soft drink (which is mostly water) at 12.0∘C What will be the person's body temperature TfinalTfinal after equilibrium is attained? Ignore any heating by the person's metabolism. The specific heat capacity of a human body is 3480 J/kg⋅KJ/kg⋅K. Is the change in the person's body temperature great enough to be measured by a medical thermometer? (A high-quality medical thermometer can measure temperature changes as small as 0.1∘C∘C or less.)

To sterilize a 43-g43-g glass baby bottle, we must raise its temperature from 22.0∘C to 95.0∘C. How much heat, in joules, is required to be transferred to the bottle?  the specific heat (c) of glass is 840 J/kg

The thermal conductivities of human tissues vary greatly. Fat and skin have conductivities of about 0.20 W/m K and 0.020 W/m · K respectively, while other tissues inslde the body have conductivities of about 0.50 W/m · K. Assume that between the core region of the body and the skin surface lies a skin layer of 1.0 mm, fat layer of 0.50 cm, and 3.2 cm of other tissues. (a) Find the R-factor for each of these layers, and the equivalent R-factor for all layers taken together, retaining two digits. Rakin m2. K/W Rat m2 . K/W Rissue m2. K/W m2- K/W (b) Find the rate of energy loss when the core temperature is 37°C and the exterior temperature is 0°C. Assume that both a protective layer of clothing and an insulating layer of unmoving air are absent, and a body area of 2.0 m.

The specific heat of most solids is nearly constant over a wide temperature range. Not so for diamond. Between 200 K and 600 K, the specific heat of diamond is reasonably well described by c=2.8T−350J/kg⋅K, where T is in K. For gemstone diamonds, 1 carat = 200 mg. How much heat energy is needed to raise the temperature of a 2.5 carat diamond from -50∘C to 250 ∘C?

One end of an insulated metal rod is maintained at 100 ∘C, while the other end is maintained at 0∘C by an ice-water mixture. The rod is 61.5 cm long and has a cross-sectional area of 1.24 cm^2. The heat conducted by the rod melts 8.55 g of ice in 10.2 min. Find the thermal conductivity k of the metal. Express your answer in watts per meter per kelvin.

A study showed the average basal metabolic rate of a human to be about 1500 kcal/day (6279 kJ/day). If it were possible to construct a bathtub in which there was no loss of heat to the surroundings, and the tub contained 25 gallons of 23.0 ®C water, what would be the final temperature of the water after an average human immersed their body in the water for 2 hours?

An electric kitchen range has a total wall area of 1.40 m2 and is insulated with a layer of fiberglass 4.0 cm thick.  The inside surface of the fiberglass has a temperature of 175 degrees C and its outside surface is at 35 degrees C.  The fiberglass has a thermal conductivity of 0.040 W/(m*K). What is the heat current through the insulation, assuming it may be treated as a flat slab with an area of 1.40 m2? What electric-power input to the heating element is required to maintain this temperature?

A cube of ice is taken from the freezer at -9.5 °C and placed in a 95-g aluminum calorimeter filled with 300 g of water at room temperature of 20.0 °C. The final situation is observed to be all ▼ Part A water at 17.0 °C. The specific heat of ice is 2100 J/kg · C°, the specific heat of aluminum is 900 J/kg · C°, the specific heat of water is is 4186 J/kg · C°, the heat of fusion of water is 333 kJ/Kg. What was the mass of the ice cube? Express your answer to two significant figures and include the appropriate units. HÀ ? Value Units m =