1. A 5 cm3 balloon is filled by a gas at a pressure
of 1 x 105 Pa . When the balloon is filled by 20
cm3 of the gas, what is the new pressure of the
gas?
A 1.0 x 105 Pa B 4.0 x 104Pa
C 2.5 x 104Pa D 4 x 103 Pa
E 5x 103 Pa
2. A bubble of air is formed at the base of a lake.
At that moment, its volume is 30 cm3 and it
experiences a pressure of 190 of cm Hg. What
is the volume of the bubble when it reaches the
surface of the sea.
[ The atmospheric pressure =
76 cm of Hg ]
A 25 cm3 B 50 cm3
C 75 cm3 D 100 cm3
E 150 cm3
Answers: 1
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State one advantage and one disadvantage of using a plane mirrior as a driving mirrior
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Arefrigerator uses r-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle except for the compression process. the refrigerant enters the evaporator at 120 kpa with a quality of 34 percent and leaves the compressor at 70°c. if the compressor consumes 450 w of power, determine (a) the mass flow rate of the refrigerant, (b) the condenser pressure, and (c) the cop of the refrigerator. (0.00644 kg/s, 800 kpa, 2.03)
Answers: 1
1. A 5 cm3 balloon is filled by a gas at a pressure
of 1 x 105 Pa . When the balloon is filled by 2...
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