Two thermometers are calibrated, one in degrees Celsius and the other in degrees Fahrenheit. At what temperature (in kelvins) do their readings measure the same temperature?

a. 218.15
b. 233.15
c. 273.15
d. 40.15
e. 0


b

Physics & Space Science

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Energy in Capacitors: An ideal parallel-plate capacitor consists of two parallel plates of area A separated by a distance d. This capacitor is connected to a battery that maintains a constant potential difference across the plates. If the separation between the plates is now doubled, the amount of electrical energy stored on the capacitor will

A. double. B. quadruple. C. be cut in half. D. be cut in fourth. E. not change.

Physics & Space Science

Consider the cooling of (a) a personal computer with a separate CPU, and (b) a laptop computer. The reliable functioning of these machines depends upon their effective cooling. Identify and briefly explain all modes of heat transfer that are involved in the cooling process.

GIVEN - A personal computer with a separate CPU (the monitor, keyboard, and mouse are separate and not considered). - A laptop computer. FIND Identify and describe modes of heat transfer involved in their cooling. ASSUMPTIONS - The computers are turned on and in normal operation.

Physics & Space Science

A 1000-kg car experiences a net force of 9500 N while slowing down from 30 m/s to 15.9,/s How far does it travel while slowing down?

A) 34 m B) 31 m C) 37 m D) 41 m

Physics & Space Science

A prismatic bar (diameter d0 5 18 mm) is loaded by force P1. A stepped bar (diameters d1 5 20 mm and d2 5 25 mm with radius of fillets R 5 2 mm) is loaded by force P2. The allowable axial stress in the material is 75 MPa. The ratio P1/P2 of the maximum permissible loads that can be applied to the bars, considering stress concentration effects in the stepped bar, is:

(A) 0.9
(B) 1.2
(C) 1.4
(D) 2.1

Physics & Space Science