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A 115kg mail bag hangs by a vertical rope 3.5m long. A postal worker then displaces the bag to a position 2.2m sideways from its original position, always keeping the rope taut. Find the force needed to hold the bag in its new position.
A nuclear power reactor generates 4.2 × 109 W of power. In one year (365.25 days), what is the change in the mass of the nuclear fuel
After a shipwreck, a solid steel spoon lies at the bottom of the ocean, 8.00km below the surface. What's the water pressure at that depth? Find the fractional volume change in the spoon due to compression forces.
What is the direction of this velocity. What is the magnitude of the velocity.
a skydriver weighs 131 lb. when the skydriver reahces terminal speed, how much air drag does the skydriver is experience
A defibrillator consists of a 15.3-µF capacitor that is charged to 8.4 kV. What is the average power delivered to the tissues
A 119-turn circular coil of radius 2.01 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. calculate the magnitude of the average EMF
A tungsten target is struck by electrons that have been accelerated from rest through a 20.0-kV potential difference
The transmission axis of the analyzer makes an angle of 32.0° with the axis of the polarizer. What fraction of the original light is absorbed by the analyzer
In a double-slit interference experiment, the wavelength is 477 nm, What is the linear distance between adjacent maxima on the screen
A lens is placed 15 cm from the lamp, and the image is observed 32 cm from the lamp. find the distance of the second image from the lamp
A father racing his son has three-fifths the kinetic energy of the son, who has half the mass of the father. What is the original speed of the son
The bowling ball has a diameter of 20.6 {rm cm}, and the angle the stick makes with the horizontal is 30.0 {rm ^circ}. You may suppose there is no friction between the stick and the bowling ball, though friction with the floor must be taken into acco..
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