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A man pushes a wooden crate on wooden floor. The direction of the force is 30o from the horizontal.
(a) How much force does he use in order to maintain a constant speed?
(b) How much work is done if he pushes the crate over a distance of 25.0 m? Kinetic friction coefficient for wood/wood is 0.50.
A ray of light passing through air is incident on a piece of quartz (n=1.46) at an angle of 25 degrees. Calculate the deviation d of the ray as it emerges back into the air
A sledge loaded with bricks has a total mass of 17.3 kg and is pulled at constant speed by a rope inclined at 19.4° above the horizontal. What is the mechanical energy lost due to friction
q1. calculate the threshold wavelength in nm of a metal if that metal emits an electron with a kinetic energy of 6.32
A 20.0g ball of clay traveling east at 8.00m/scollides and sticks together with a 20.0g ball of clay traveling north at 8.00m/s. What is the speed of the resulting ball of clay
A 1020kg artillery shell is fired from a battleship. While it is in the barrel of the gun, it experiences an acceleration of 2.1x10^4m/s^2. what net force is exterted on the artillery shell before it leaves the barrel of the gun
A straight, stiff wire of length 1.00 m and mass 21g is suspended in a magnetic field B = 0.58T. The wire is connected to an emf. How much current must flow in the wire and in what direction so that the wire is suspended and the tension in the sup..
Two waves have the exact same frequency, wavelength, and amplitude. They are both travelling in the +x direction, What is the phase difference between the two waves.
A 1.50 multiplied by 103kg car starts from rest and accelerates uniformly to 18.50m/s in 13s. Assume that air resistance remains constant at 400N during this time.
Coherent light with wavelength 591 passes by two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 from the slits. The first-order bright fringe is a distance of 4.84 from the center of the central bright f..
what is the equivalent resistance between points A and B?
A 52-kg mountain climber, starting from rest climbs a vertical distance of 730m. At the top, she is again at rest. Find her efficiency as a heat engine
You compress a spring with k = 3000 N/m a distance of 0.2 m with a block of mass 4 kg. hat is the velocity of the block after it leaves the spring but before it gets to the incline
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