Physics, 20.09.2019 01:50 breiajanae880
The filament of a 240 v, 100 w electric lamp heats up from room temperature to its operating temperature. as it heats up, its resistance increases by a factor of 16. what is the resistance of this lamp at room temperature?
a 36ω
b 580ω
c 1.5 kω
d 9.2 kω
Answers: 2
Physics, 21.06.2019 20:30
Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)
Answers: 2
Physics, 21.06.2019 23:30
The pressure, volume, and temperature of a mole of an ideal gas are related by the equation pv = 8.31t, where p is measured in kilopascals, v in liters, and t in kelvins. use differentials to find the approximate change in the pressure if the volume increases from 14 l to 14.6 l and the temperature decreases from 375 k to 370 k. (round the answer to two decimal places.)
Answers: 3
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