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- After sitting out of a refrigerator for a while, a turkey at room temperature (72^\circ72∘F) is placed into an oven. The oven temperature is 315^\circ315∘F. Newton's Law of Heating explains that the temperature of the turkey will increase proportionally to the difference between the temperature of the turkey and the temperature of the oven, as given by the formula below: T=T_a+(T_0-T_a)e^{-kt}T=Ta+(T0−Ta)e−kt T_a=Ta= the temperature surrounding the objectT_0=T0= the initial temperature of the objectt=t= the time in hoursT=T= the temperature of the object after tt hoursk=k= decay constant The turkey reaches the temperature of 136^\circ136∘F after 2 hours. Using this information, find the value of kk, to the nearest thousandth. Use the resulting equation to determine the Fahrenheit temperature of the turkey, to the nearest degree, after 6 hours. Enter only the final temperature into the input box.A child has a temperature of 101◦F .If her total skin area is 2 m2, find the energyloss per second due to radiation, assuming theemissivity is 1. Assume the room temperatureis 70◦F. The Stephan-Boltzmann constant is5.6696 × 10^−8 W/m2· K4.Answer in units of W.A fixed mass of an ideal gas is heated from 50 to 80°C at a constant pressure of (a) 1 atm and (b) 3 atm. For which case do you think the energy required will be greater? Why?
- At 22 °C, the radius of a solid aluminum sphere is 7 cm.A, at what temperature will the volume of the sphere have increased by 3%? B, What is the increase in the sphere’s radius if it is heated to 250 °C? Assume α = 22.2×10-6 K-1and β=66.6×10-6 K-1 .What is the ratio between the thermal radiation of an object at 60 oC compared to the same object at 20 oC?A fixed mass of an ideal gas is heated from 50 to 80°C at a constant volume of (a) 1 m3 and (b) 3 m3. For which case do you think the energy required will be greater? Why?
- Energy and Mass: If a typical city consumes electrical energy at a rate of 2.0 GW (that's 2 billion joules per second), how many kilograms of matter would have to be converted entirely into electrical energy in order to keep this city running for 14 weeks? (c = 3.0 × 108 m/s)How much energy is contained in 0.525 g of matter? Recall the speed of light c = 3.00 * 10 ^ 8 * m / s = 1.86 * 10 ^ 5 * mi / s.In a certain solar house, energy from the Sun is stored in barrels filled with water. In a particular winter stretch of five cloudy days, 1.00* 10^6 kcal is needed to maintain the inside of the house at 22.0 C. Assuming that the water in the barrels is at 50.0 C and that the water has a density of 1.00 * 10^3 kg/m3, what volume of water is required?
- A star radiates heat at the rate of 2.70 × 10^30 W and has a surface temperature of 3000 K. Assuming that it is a perfect emitter, what is the radius of Betelgeuse? The Stefan-Boltzmann constant is 5.670 × 10-8 W/m2 • K4If 3.90×105 J of energy is supplied to a container of liquid oxygen at -183°C, how much oxygen can evaporate? LV = 2.1×105 J/kg Lf = 1.4×104 J/kg Boiling Point = 90 KPlease only asnwer part (d) Answer of (a) : 60 Answer of (b) : 120 Answer of (c) : particle K.E. increases by 17.1J