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The total volume of a new house is 800 m3. Before the heat is turned on, the air temperature inside is 10°C, and the relative humidity is 50%. After the air is warmed to 20°C, how much water vapor must be added to the air to make the relative humidity 50%?
A laser used to repair a detached retina has wavelength of 532nm. How many photons are in each pulse
A conveyor belt at a quarry lifts 2,000 kg of sand per minute up a vertical distance of 12 meters. The sand is originally at rest, then moves at a speed of 0.20 m/s all along the conveyor belt. What is the instantaneous power produced by this machine..
Assume that you need to get a heavy couch into the bed of a pickup truck. You know the bed of the truck is at the height of 1.00 and you require a ramp that makes an angle of 40 with the ground if you are to be able to push the couch.
q1. a loudspeaker of mass 15.0 is suspended a distance of h 2.30 below the ceiling by two cables that make equal
charge is distributed with constant volume density d throughout the rectangular box with length a width b and height
If 1,000 gallons per minute (gpm) of water are flowing through a 4-inch (inside diameter) pipe, what is the average velocity of the water in the pipe
An old hunting weapon was a rock on the end of a string. The hunter would swing the rock in horzontal circles and then throw it. If the rock had a mass of 2 kg and the 2 m long string breaks when the tension is 60N.
Ina mass spectrometer, ions are directed into a magnetic field, where they curve around in the field and strike a detector. If several singly ionized atoms travel at the equal speed through the magnetic field, would you expect them all to be defle..
A compact car has a mass of 1170kg. What will be the car's oscillation frequency while carrying four 84.0kg passengers
A 25.0-mH inductor, a 2.00-%u03BCF capacitor, and a certain resistor are connected in series across an ac voltage sourceat 1000 Hz. what is the value of the resistor
A 4.0 kg ball is traveling at 3.0 m/s and strkes a wall. The 4.0 kg ball bounces off the wall with a velocity of 4.0 m/s. determine the average force on the ball
q1. a uniform plank of length 4.6 m and weight 204 n rests parallel on two supports with 1.1 m of the plank hanging
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