Physics, 17.03.2020 03:24, bearminar2156
An ideal gas is carried around the cyclic process described by the diagram. Which change would most increase the net work that the gas performs per cycle?
doubling the values of V1, V2, p1, and p2
doubling the values of V1 and V2, while keeping p1 and p2 constant
replacing p2 with p1+p2/2
replacing V2 with V1
Answers: 2
Physics, 21.06.2019 16:00, george27212
The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.
Answers: 2
Physics, 22.06.2019 00:30, powberier6979
Consider an ordinary, helium-filled party balloon with a volume of 2.2 ft3. the lifting force on the balloon due to the outside air is the net resultant of the pressure distribution exerted on the exterior surface of the balloon. using this fact, we can derive archimedes’ principle, namely that the upward force on the balloon is equal to the weight of the air displaced by the balloon. assuming that the balloon is at sea level, where the air density is 0.002377 slug/ft3, calculate the maximum weight that can be lifted by the balloon. note: the molecular weight of air is 28.8 and that of helium is 4.
Answers: 2
Physics, 22.06.2019 06:00, pinkyglitter2696
What are atoms of the same element with varying number of neutrons
Answers: 3
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