A former student of mechanics wishes to weigh himself but has access only to a scale a with capacity limited to 120 lbs and a small 20-lb spring dynamometer
b. with the rig shown he discovers that when he exerts a pull on the rope so that b registers 16 lb, the scale a reads 100 lb. what is his correct weight?
Answers: 1
Physics, 22.06.2019 03:30
Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n
Answers: 1
Physics, 22.06.2019 07:20
If 2 moles of co_2 at 2l and 500k are expanded reversibly to 20l, more work can be obtained from an adiabatic process than from an isothermal process. is the above statement true or false?
Answers: 3
Physics, 23.06.2019 03:00
The law of entropy can also be called the law of increasing disorder, but this law seems to contradict the existence of living organisms that are able to organize chemicals into organic molecules. prepare for a class debate on the validity of the following arguments: a. living things are not subject to the laws of thermodynamics. b. the increase in the universe's entropy due to life processes is greater than the decrease in entropy within a living organism.
Answers: 2
A former student of mechanics wishes to weigh himself but has access only to a scale a with capacity...
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