A 5 gram lead bullet traveling in 20°C air at 300 m/s strikes a flat steel plate and stops. What is the final temperature of the lead bullet? (Assume all heat is retained by the bullet). The melting point of lead is 327°C. The specific heat of lead is 0.122 J/g/C°. The heat of fusion of lead is 24.7 J/g.

A block of aluminum at a temperature of T1 = 31 degrees C has a mass of m1 = 14 kg. It is brought into contact with another block of aluminum with a mass of m2 = 0.5m1, at a temperature of T2 = 15 degrees C. This aluminum has a heat capacity of c = 899 J/kg K. Input an expression for the final temperature of the blocks.

You drop an ice cube into an insulated flask full of water and wait for the ice cube to completely melt. The ice cube initially has a mass of 65.0 g and a temperature of 0°C. The water (before the ice cube is added) has a mass of 670 g and an initial temperature of 28.0°C. What is the final temperature (in °C) of the mixture? (Assume no energy is lost to the walls of the flask, or to the environment.)

A cooking pot has a copper bottom of area 4.00x 10-2 m2 and thickness 1.00 cm. if the pot is set on a 521 °F stove top and filled with ice water, what is the melting rate of the ice? The thermal conductivity of copper is 3.90x 102 J/(s m K) and the latent heat of fusion of water is 3.35x 105 J/kg.(answer must be in kg/s) Estimate the lowest environment temperature that a person, who has skin temperature 34.0 °C, total skin area 1.53 m², emissivity 0.800, and metabolic energy production 157 J/s, can stand naked without a significant drop of body temperature. (answer in celicus)

In an experiment, a 125-g sample of an unknown metal is heated to 98.0°C. The metal is then placed into a 25.0-g aluminum calorimeter cup (with c = 900 J/kg.°C) containing 200-g of water at 20.0°C. When equilibrium is reached, the final temperature is 28.2°C. What is the specific heat of the unknown metal? %3D 637.2 J/kg-°C 673.7 J/kg.°C 679.9 J/kg.°C 788.5 J/kg.°C А. D. В. 808.0 J/kg.°C Е. С. 775.2 J/kg.°C F.

A chunk of hot iron is pulled out of a fire and placed between aluminum vice grips.  The mass of the iron is 219 g and the mass of the aluminum is 66.4 g.  The iron is initially 351.8 °C.  The aluminum is initially 24.7 °C.  Assuming no loss of heat to the environment, what is the final temperature of the iron-aluminum system? I couldn't even get started on this one.

You are given 204 g of coffee (same specific heat as water) at 80.0°C (too hot to drink). In order to cool this to 60.0°C, how much ice (at 0.0°C) must be added? Ignore the heat capacity of the cup and heat exchanges with the surroundings. Specific heat capacity (15.0°C) of water is 4.186 kJ/(kg-K). The latent heat of fusion of water is 333.7 × 103 J/kg.

The average thermal conductivity of the walls (including windows) and roof of a house in the figure shown below is 4.8 x 104 kW/m - °C, and their average thickness is 20.8 cm. The house is heated with natural gas, with a heat of combustion (energy given off per cubic meter of gas burned) of 9,300 kcal/m3. How many cubic meters of gas must be burned each day to maintain an inside temperature of 27.3°C if the outside temperature is 0.0°C? Disregard surface air layers, radiation, and energy loss by heat through the ground. m3 37.0 5.00 m 8.00 m 10.0 m

Suppose you place 0.265 kg of 24.5°C water in a 0.45 kg aluminum pan with a temperature of 147.5°C, and 0.0125 kg of the water evaporates immediately, leaving the remainder to come to a common temperature with the pan. What would be the final temperature, in degrees Celsius, of the pan and water? The heat of vaporization of water is Lv = 2256 kJ/kg. You may neglect the effects of the surroundings and the heat required to raise the temperature of the vaporized water.  Te =

An aluminum bar has a cross-section that is 5.1 cm by 6.93 cm and is 1.91 m long. Aluminum has a thermal conductivity of 205 W/m K. If the aluminum bar is used to bridge between ice at 0 °C and boiling water at 100 °C, what is the rate of heat transfer (in W) along the bar?