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Physics, Statistical Physics
Year 3
Problems
The coefficient of linear expansion of steel is 12 à— 10-6/C°. A railroad track is made of individual rails of steel 1.0 km in length. By what length would these rails change between a cold day when the temperature is -10 °C and a hot day at 30 °C?
A 0.62 cm
B 24 cm
C 48 cm
D 480 cm
E 620 cm
The coefficient of volumetric expansion for gold is 4.20 à— 10-5/C°. The density of gold is 19 300 kg/m3 at 0.0 °C. What is the density of gold at 1050 °C?
A 20 200 kg/m3
B 19 300 kg/m3
C 19 000 kg/m3
D 18 800 kg/m3
E 18 500 kg/m3
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How long does it take to load - How long does it take to load a 64-KB program from a disk whose average seek time is 10 msec, whose rotation time is 10 msec and whose tracks hold 32 KB:
A) For a 2-KB page size?
B) For a 4-KB page size?
BSS - Block Started by Symbol - An editor has 100 KB of program text, 30 KB of initialized data, and 50 KB of BSS (Block started by symbol). The initial stack is 10 KB. Suppose that three copies of this editor are started simultaneously. How much physical memory is needed (a) is shared text is used, and (b) if it is not?
Baud Rate - Some computers need to have large numbers of RS-232 lines (e.g. servers or Internet providers). For this reason, plug-in cards with multiple RS-232 lines exist. Suppose that such a card contains a processor that must sample each incoming line at 8 times the baud rate to see if the incoming bit is a 0 or a 1. Also suppose that such a sample takes 1 usec. For 28,800-bps lines operating a...
Mathematical Concepts - A car, starting from rest, accelerates in a straight-line path at a constant rate of 2.5 m/s2. How far will the car travel in 12 seconds?
A. 180 m
B. 120 m
C. 30 m
D. 15 m
E. 4.8 m
In the sport of platform diving, a platform is set at a height of 7.3 m above the surface of the water. What is the height, expressed in feet, of the platform?
A. 13 feet
B...
Problems - Which is the correct answer.
During an evening news broadcast in Helsinki, Finland, the meteorologist indicated that the day's lowest temperature was -4.0 °C. What is the corresponding value of this temperature on the Fahrenheit scale?
A -7.2 °F
B -4.0 °F
C 17 °F
D 25 °F
E 39 °F
Complete the following statement: Bimetallic strips used as adjustable...
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