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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- 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 /°C
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- 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.