Pulling of bag at airport floor at a constant velocity
A flight attendant pulls her 60 N flight bag a distance of 358 m along a level airport floor at a constant velocity. The force she exerts is 38 N at an angle of 50° above the horizontal.
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Blood alcohol content (BAC) is often reported in weight-volume percent (w/v%). For example, a BAC of 0.08% corresponds to 0.08 g CH3CH2OH per 100 mL of blood.
The test for this drug is 90% accurate for users of the drug. (This means 90% of the tests come back positive if the person uses the drug). What is the probability that an athlete tests positive and is a user of an illegal drug?
Liquid nitrogen has a density of 0.808g/ml at 77 K. A sample of 2.5 L of liquid nitrogen is allowed to evaporate at 21°C and 1.00 atm of pressure. what volume will the nitrogen gas occupy?
Determine the reduction in the exit temperature of the compressed air and the compressor power saved. Assume the water vaporizes completely before leaving the compressor.
Taking the properties of the egg to be ρ = 1020 kg/m3 and cp = 3.32 kJ/kgC, determine how much heat is transferred to the egg by the time the average temperature of the egg rises to 80C.
To maintain the temperature inside a house at 20° C, the electric power consumption of the electric baseboard heaters is 30.7 kW on a day when the outside temperature is -6° C. At what rate does this house contribute to the increase in the
Determine the amount of extra heat that must be supplied to the gas in the cylinder which is maintained at constant pressure to achieve this result. Assume the molar mass of the gas is 25.
When a 0.6333-g sample of a compound of carbon, hydrogen and sulfur was burned in excess oxygen, 0.9272 g CO2, 0.3795 g H2O and 0.6749 g SO2 were obtained.
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How does the uncertainty principle in quantum mechanics challenge our classical intuition about the simultaneous measurement of position and momentum?
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