Physics, 18.11.2019 23:31 wyattjefferds05
3. a 2kg wooden block whose initial speed is 3 m/s slides on a smooth floor for 2 meters before it comes to a
stop.
a. find the coefficient of friction?
b. how much force would be needed to keep the block moving at a constant speed across the floor?
Answers: 1
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True or false graphs must include scales that increase by the same amount
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On a day when the barometer reads 75.23 cm, a reaction vessel holds 250 ml of ideal gas at 20 celsius. an oil manometer ( Ď= 810 kg/m^3) reads the pressure in the vessel to be 41 cm of oil and below atmospheric pressure. what volume will the gas occupy under s.t.p.?
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Physics, 22.06.2019 12:50
Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.
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Physics, 22.06.2019 14:00
Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.
Answers: 1
3. a 2kg wooden block whose initial speed is 3 m/s slides on a smooth floor for 2 meters before it c...
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