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The room thermostatis set at 68.0oC. What is thetemperature setting for the room indegrees Celsius(oC)and in Kelvin, respectively?
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- What are the following temperatures on the Kelvin scale? (a) 68.0 F, an indoor temperature sometimes recommended for energy conservation in winter (b) 134 F, one of the highest atmospheric temperatures ever recorded on Earth (Death Valley, California, 1913) (c) 9890 F, the temperature of the surface of the SunSuppose you are a doctor in a blood bank. There are studies that suggest that blood stored at 4.0OC lasts safely for bout 3 weeks, whereas blood stored at -160OC lasts for 5 years. You are asked to convert both the temperatures in Fahrenheit and Kelvin scales. What are the values?1. Which one of the following statements correctly describes the Celsiusand the Kelvin temperature scales? (a) The size of the degree on theCelsius scale is larger than that on the Kelvin scale by a factor of 9/5.(b) Both scales assign the same temperature to the ice point, but they assign diff erent temperatures to the steam point. (c) Both scales assign thesame temperature to the steam point, but they assign diff erent temperaturesto the ice point. (d) The Celsius scale assigns the same values to the iceand the steam points that the Kelvin scale assigns. (e) The size of thedegree on each scale is the same.
- An object has an emissivity of 0.725. At temperature T, it radiates heat at a rate of 10.W. What is its rate of heat radiation at temperature 2T?A) Convert the temperature 113oF into the Celsius scale? B) What is 113oF in the Kelvin scale?At 20C, a rod is exactly 20.05 cm long on a steelruler. Both are placed in an oven at 270C, where the rod nowmeasures 20.11 cm on the same ruler.What is the coefficient oflinear expansion for the material of which the rod is made?
- (a) Normal body temperature.The average normal body temperature measured in the mouthis 310 K. What would Celsius and Fahrenheit thermometers read forthis temperature? (b) Elevated body temperature. During very vigorousexercise, the body’s temperature can go as high as 40°C. Whatwould Kelvin and Fahrenheit thermometers read for this temperature?(c) Temperature difference in the body. The surface temperature ofthe body is normally about 7 C°lower than the internal temperature.Express this temperature difference in kelvins and in Fahrenheit degrees.(d) Blood storage. Blood stored at 4.0°C lasts safely for about 3 weeks,whereas blood stored at -160 C lasts for 5 years. Express both temperatureson the Fahrenheit and Kelvin scales. (e) Heat stroke. If the body’stemperature is above 105°F for a prolonged period, heat stroke can result.Express this temperature on the Celsius and Kelvin scales.a sphere emissivity = 0.42 of radius 25 cm is at 27 degrees celsius is placed in a room with a temperature of 2 degrees celsius A. what is the rate of heat energy enterinh the sphere B. How long will it take for the spiritual as 1 x 10^6 joules of energy?Mercury thermometers cannot measure temperatures below -30◦C because at that temperature Hg becomes pasty. Could you indicate to what temperature Fahrenheit and Kelvin it corresponds?
- Problems At 12 km in the standard atmosphere, the pressure, density, and temperature are 1.9399 × 104 N/m², 3.1194 × 10−¹ kg/m³, and 216.66 K, respectively. Using these values, calculate the standard atmospheric values of pressure, density, and temperature at an altitude of 18 km, and check with the standard altitude tables.A coffee, with a temperature of 60 o C, is pour in a glass with diameter of 10 cm and height of 13 cm . The coffee has a continuous heat transfer of 60 W. What is the temperature (in Celsius) of the surface of the glass if convective heat transfer , h, is 50 W/m2-K?This thermostat setting is in degrees Fahrenheit. What is the equivalentthermostat setting on the Celsius scale?