A small refrigerator freezer, 16 in x 16 in x 18 in outer dimensions, has an inside surface temperature of 10ºF and an outside surface temperature of 80ºF. If the walls are uniformly 3 inches thick, homogeneous, and with thermal properties the same as Styrofoam, estimate the heat transfer through the walls and door of the refrigerator.
What will be an ideal response?
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Wien's Law: What are the wavelength and the corresponding photon energy (in electron-volts) of the primary light emitted by an ideal blackbody at each of the following temperatures? (c = 3.00 × 108 m/s, h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J, and the constant in Wein's law is 0.00290 m ? K) (a) 400°C?(b) 800°C?(c) 1200°C?
What will be an ideal response?
The gravitational slingshot effect can increase the speed of a spacecraft, but not decrease it
Indicate whether the statement is true or false
What is electric potential energy?
a. The work done in charging an object from some reference charge to the object's charge. b. The work done in releasing the charge on an object. c. The work done in bringing the object from some reference location to the object's location. d. The work done along the specific path that the charge has followed. e. The work done against gravity to lift the charged object from its ground height to its present height.
A K? x-ray corresponds to the missing electron orbital on an atom going from 1s to _________.
Fill in the blank(s) with the appropriate word(s).