(a) Calculate the one temperature at which Fahrenheit and Celsius thermometers would display the same number, (b) do the same for a Fahrenheit and kelvin thermometer. Hint: We can start by stating Tf=Tc=T, and then we know TF = 9/5 TC + 32°, but we can just refer to both Tf and Tc as T (because we’ve stated they are equal) and then solve for T

Temperature differences on the Rankine scale are identical to differences on the Fahrenheit scale, but absolute zero is given as 0°R. (a) Find a relationship converting the temperatures TF of the Fahrenheit scale to the corresponding temperatures TR of the Rankine scale.(b) Find a second relationship converting temperatures TR of the Rankine scale to the temperatures TK of the Kelvin scale.

(a) What is the rate of energy loss in watts per square meter through a glass window 2.4 mm thick if the outside temperature is -5.1°F and the inside temperature is +70°F? (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 5.9 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? (The thermal conductivity of window glass is 1.0 W/m-K, and of air is 0.026 W/m.K.) (a) Number i (b) Number Units Units

(a) What is the rate of energy loss in watts per square meter through a glass window 2.4 mm thick if the outside temperature is -7.8°F and the inside temperature is +81°F? (b) A storm window having the same thickness of glass is installed parallel to the first window, with an air gap of 6.0 cm between the two windows. What now is the rate of energy loss if conduction is the only important energy-loss mechanism? (The thermal conductivity of window glass is 1.0 W/m-K, and of air is 0.026 W/m-K.) (a) Number i (b) Number i Units Units

Imagine a thermometer which is spherical shell of volume 100 cm attached to a long tube with equally spaced marks on it. The volume of the tube between to consequent marks is 0.2 cm. Sphere and tube contain air separated from surronding space by a drop of water. At temperature 5°C this water drop is at the 20-th mark on the tube. What is the temperature in the room where the drop settles at the 50-th mark.

In this example we see how thermal expansion can actually throw off the accuracy of a length-measuring device-namely, a tape measure. A surveyor uses a steel measuring tape that is exactly 50.000 m long at a temperature of 20 °C. What is its length on a hot summer day when the temperature is 35 °C? SOLUTION SET UP AND SOLVE We have Lo = 50.000 m. To (Note that because AL is usually much smaller than Lo, we need steel is 1.2 x 10-5 K-¹. Using the same equation, The new length is Part A - Practice Problem: 20 °C, and T 35 °C. We use the following equation to find AL: AL=aLo AT IVD ΑΣΦ Submit L = Lo + AL 50.000 m -0.0090 m : 50,009 m REFLECT The measuring tape lengthens by 9 mm, or 0.018%. In surveying a baseball field, this amount is negligible, but not when measuring the length of a steel bridge. Note that, although Lo is given to five significant figures, we need only two of them to compute AL. Request Answer keep more significant figures in the lengths than in the temperatures.) The…

A turbojet is flying with a velocity of 900 ft/s at an altitude of 20,000 ft, where the ambient conditions are 7 psia and 10°F. The pressure ratio across the compressor is 13, and the temperature at the turbine inlet is 2400 R. Assuming ideal operation for all components and constant specific heats for air at room temperature, determine the pressure at the turbine exit.