Calculate the change in 5 m long copper wire when its temperature changes by 60° C. State your assumptions if there are any.
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- A water tank is completely filled with liquid water at 20°C. The tank material is such that it can withstand tension caused by a volume expansion of 0.8 percent. Determine the maximum temperature rise allowed without jeopardizing safety. For simplicity, assume ? = constant = ? at 40°C.Calculate the melting point of ice under a pressure of 10 MPa in Kelvin. Assume that the density of ice under these condition is approximately 0.915g/cm3 and that of liquid water is 0.9980 g/cm3Volume 0.05 m3 while the piston is attached with the pinin a cylinder with 200 kPa pressure and 300 Kthe temperature is. As a result of heat transfer from the environment, the pressure is 0.4 MPa, the pin breaks, and when the system becomes thermodynamically balanced, its volume is 0.1 m3. Area of piston 0.05 m2, piston and masses on 150 kg and atmospheric pressure102 is KPA. a)Find the temperature at the moment the pin breaks. b)Calculate the pressure and temperature after the pin breaks and reaches the equilibrium position.
- A thermometer reading 75o F is taken outwhere the temperature is 20oF. The reading is30oF 4 minutes later. Find the thermometerreading 7 minutes after the thermometer wasbrought outside.The tension in the walls of a horizontal 0.1 m diameter pipe under a static pressure of 10000 cm of water and submerged to a depth of 10 m in a fresh-water river is:A 25-kg block hangs from a spring attached to the ceiling of the elevator. If spring gets stretched by 0.15 m, find its spring constant.
- You and your team are conducting a restoration project at an old city hall to investigatethe condition of the old chandelier at the main hall. The chandelier was estimated toweigh 4800 N and supported by three cables as shown in Figure 1. The project requiresyou to investigate the condition of the cables holding the chandelier after many years.Given the diameter of cable B is 6mm, while diameter of cable C is 1.25 times and cableA is 1.5 times of cable B, analyze the stress condition of the cables and propose a suitableinclination of the cable B to maintain the normal stress in cable C to be 0.5 times thanthe normal stress of cable B in order for the cable to support the chandelierApplications of DE A thermometer at initial temperature of 10C is brought into a room whose temperature is 90C. Two minutes later the thermometer reading is 20C. Determine the temperature reading at any time t. The time taken for the thermometer to increase 30C?Compute the heat rejected in KJ from a cylinder containing Steam at 2 MPa and 250°C if it is rigid and is cooled until the pressure is 1.5 MPa. The mass of the steam is 15.169 kg.
- A mass of 200 kg of water at 20°C is stored in a tank. An engine coupled to a propeller inside the tank transfers energy into the water causing it to heat up. What will be the water temperature after two hours with the engine running continuously? It is known that the engine power is 5 HP. (1 HP ≅ 0.75 kW). Take it out that the system has perfect thermal insulation.A cylindrical storage tank is 10m high and 25m in diameter. It is filled to a depth of 9.93 m with oil, having a coefficient of volumetric expansion of 4.4 x 10-4 / °C. To the nearest degree, how much will the temperature of the oil have to change to completely fill the tank. Consider only the oil; neglect the expansion of the tank itself. [16.0 °C]A water tank is completely filled with liquid water at 60°C. The tank material is suchthat it can withstand tension caused by a volume expansion of 4%. Determine the maximum temperature rise allowed without jeopardizing safety. Take water coefficient of expansion (β) as 5.22 x 10-4 1/K at this temperature.