A steel rod (p=7860 kg/m³) has a length of 3.75 m. It is bolted at both ends between immobile supports. Initially there is no tension in the rod, because the rod just fits between the supports. Find the tension that develops when the rod loses 3190 J of heat. Number ! Units N
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- Part A A cube 23 cm on each side contains 2.6 g of helium at 20 °C. 1200 J of heat energy are transferred to this gas. What is the final pressure if the process is at constant volume? Express your answer to two significant figures and include the appropriate units. Value Units P= Submit Request Answer Part B What is the final volume if the process is at constant pressure? Express your answer two significant figures and include the appropriate units. Value Units V = Submit Request AnswerThe Concorde was a supersonic aircraft used for trans-Atlantic travel in the 1980s and 1990s, having a length of 61.5 m when sitting on the ground on a typical day when the temperature is 14.0 °C.The Concorde is primarily made of aluminum. In flight at twice the speed of sound, friction with the air warms the Concorde's skin and causes the aircraft to Part A What is the temperature T of the Concorde's skin in flight? • View Available Hint(s) lengthen by 30.0 cm . (The passenger cabin is on rollers, so the airplane expands around the passenger cabin.) Take the coefficient of linear expansion for ? aluminum to be a = 2.40x10-5 /°C. T = °CA 84.9-N backpack is hung from the middle of an aluminum wire, as the drawing shows. The temperature of the wire then drops by 25.5 C°. Find the tension in the wire at the lower temperature. Assume that the distance between the supports does not change, and ignore any thermal stress. Number i Toxtbook and Media Lo T 3.00⁰ Units Lo 3.00⁰
- 86. D A lawnmower engine with an efficiency of 0.22 rejects 9900 J of heat every second. What is the magnitude of the work that the engine does in one second?D How many joules of heat are required to melt 8.5 g of copper at a temperature of 1083°C? Use the values found in Table 15 from Appendix C of your text. Add your answer MCons The value of specific heat for copper is 390 J/kg · C°, for aluminun is 900 J/kg · C°, and for water is 4186 J/kg · C°. Part A What will be the equilibrium temperature when a 265 g block of copper at 255 °C is placed in a 145 g aluminum calorimeter cup containing 875 g of water at 15.0 °C? Express your answer using three significant figures. να ΑΣφ T = °C %3D
- The height of the Eiffel tower is 324 m, and let's assume it's made completely of steel, which has a thermal coefficient of 1.20 × 10-5/°C. a. How much taller, in meters, does the Eiffel Tower become at the end of a day when the temperature has increased by 17.5°C?B10a 6.0 cm diameter cyliinder of nitrogen gas has a 4.0 cm thick movable copper piston. the cylinder is oriented vertically as shown in the figure, and the air above the piston is evacuated. when the gas temperature is 25 degree C the piston floats 20 cm above the bottom of the cylinder then 1.5 J of heat energy are transferred to the gas. what is the new equilibrium temperature of the gas in degree C
- A 689.00g block of gold ( cgold=129 J kg°C ) initially at 15.00°C is placed in thermal contact with an unknown mass of aluminum ( calum=900 J kg°C ) initially at 90.00°C . If they equilibrate at a final temperature of 68.00°C , what is the mass of the aluminum? g What assumption do we make when solving calorimetry problems like this? We can only have two substances in thermal contact. The substances are in a closed, isolated container that does not allow any energy to enter or leave the system. The two substances must have different specific heats. Some of the energy transferred from one substance is lost to its surroundings and does not go to the other substance.Two bodies P and Q are in thermal equilibrium. This statement means that 18. A There is no transfer of energy between P and Q. B The rate of transfer of heat between P and Q is constant. C P and Q have the same amount of internal energy. D Pand Q are in physical contact with cach other.A2.9 kg lump of aluminum is heated to 95°C and then dropped into 10.0 kg of water at 5.0°C. Assuming that the lump-water system is thermally isolated, what is the system's equilibrium temperature? Assume the specific heats of water and aluminum are 4186 and 900 J/kg-K, respectively. Number i Units