A. A metal sphere has a coefficient of thermal expansion of is 9 x 10-6 °C-1. The internal diameter of the metal sphere is 10.2 cm. If the final diameter is 5.2 cm, temperature? at 20 °C what is the final
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- A superhero is building a suit of armor made of Vibranium (Vb). To mold the headpiece of this suit, he need to heat 1 kg of the metal into its forging temperature. Its forging temperature must be at least 70% of its melting point in Kelvin (MPyB = 3297 K). Assuming that the melting point and the forging temperature of Vb can be achieved, answer the following questions. a. Determine the specific heat capacity (J/kg-°C) of Vb if it loses 519.2775 kJ as it is being cooled from its melting point down to its forging temperature. b. The newly forged headpiece is then submerged in 2.5 L of liquid water initially at room temperature. Since the headpiece is still at its forging temperature right before it was submerged in water, some of the water vaporized in the process. What is the volume (L) of the remaining liquid water if the headpiece and the remaining water are in thermal equilibrium at 50 °C?An aluminum bar has a cross-section that is 5.07 cm by 6.38 cm and is 1.53 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?A wall consists of a concrete layer on the outside and a wood layer on the inside. W The concrete on the outside is 10.00cm thick and has a thermal conductivity of 0.500 m.K W The wood on the inside is 3.00cm thick and has a thermal conductivity of 0.180 m·K The outside temperature is 38.00°C and the inside temperature is 22.00°C. The surface area of the wall is 25.0m². а. What is the rate of heat flow through the wall? b. What is the temperature in between the concrete and the wood?
- A. find the increase in length of 12 m of copper wire wh it's temperature increases from 4°C to 34°C the linear coefficient of expansion for copper is 1.7x10^-5 /°CA copper rod and an aluminum rod of equal diameter are joined end to end in good thermal contact. The temperature of the free end of the copper rod is held constant at 100°C, and that of the far end of the aluminum rod is held at 0°C. If the copper rod is 0.32 m long, what must be the length of the aluminum rod so that the temperature at the junction is 50°C? mA 0.0600-kg ice cube at -30.0°C is placed in 0.450 kg of 35.0°C water in a very well-insulated container. What is the final temperature in degrees Celsius? °C t.
- An insulated beaker with negligible mass contains liquid water with a mass of 0.235 kg and a temperature of 72.2 °C. ▼ Part A How much ice at a temperature of -21.4 °C must be dropped into the water so that the final temperature of the system will be 32.0 °C ? Take the specific heat of liquid water to be 4190 J/kg. K, the specific heat of ice to be 2100 J/kg. K, and the heat of fusion for water to be 3.34x105 J/kg . ► View Available Hint(s) mice = 0.096 Submit VE ΑΣΦ Provide Feedback Previous Answers www X Incorrect; Try Again; 5 attempts remaining kg Next >Suppose due to a bad break of your femur, you require the insertion of a titanium rod to help the fracture heal. The coefficient of linear expansion for titanium is a-8.60-106 K and the length of the rod when it is in equilibrium with the leg bone and muscle at 37.0°C is 5.10 cm. How much shorter was the rod at room temperature (20.0°C)? umA150 cm long copper rod is 3kg in mass. What is the change in length (in centimeters) in the rod if 45000 J of energy is transferred to it? The coefficient of linear expansion of copper is 17x10^-6 /C°. The specific heat capacity of copper is 390 J/kg.C°. Round-off your answer to the nearest thousandths. Do not type the unit of your final answer.
- Aluminum rivets used in airplane construction are made slightly larger than the rivet holes and cooled by "dry ice" (solid CO₂) before being driven. Part A If the diameter of a hole is 4.500 mm, what should be the diameter of a rivet at 23.0°C, if its diameter is to equal that of the hole when the rivet is cooled to -78.0°C, the temperature of dry ice? Assume that the expansion coefficient of aluminum is 2.4 x 10-5 (°C)-¹ and remains constant. -1 Express your answer in milimeters to four significant figures. d = Submit 15. ΑΣΦ Request Answer ? Review Constants mmA hot air balloon uses the principle of buoyancy to create lift. By making the air inside the balloon less dense then the surrounding air, the balloon is able to lift objects many times its own weight. A large hot air balloon has a maximum balloon volume of 2090 m3. a. If the air temperature in the balloon is 54 °C, how much additional mass, in kilograms, can the balloon lift? Assume the molar mass of air is 28.97 g/mol, the air density is 1.20 kg/m3, and the air pressure is 1 atm.A thermos contains 160 cm3 of coffee at 93.2 °C. To cool the coffee, you drop two 10.5-g ice cubes into the thermos. The ice cubes are initially at 0 °C and melt completely. What is the final temperature of the coffee in degrees Celsius? Treat the coffee as if it were water.