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A 20 N horizontal force pushes a 5 kg box on a flat surface. The coefficient of friction between the box and the surface is 0.3. What is the acceleration exerted by the surface of the box?
Explain what a segmented labor market is, and how "queueing" theory can help explain it. According to How the Other Half Works, which workers are at the top of the hiring queue for the low-wage jobs the authors studied in LA, and why?
Light of wavelength 687 nm is incident on a single slit 0.75 mm wide. At what distance from the slit must a screen be placed if the second dark fringe in the diffraction pattern is to be 1.7 mm from the center of the diffraction pattern?
A tennis player hit a ball 2.0 m above the ground. The ballleaves his racquet with a speed of 20m/s and an angle of 5.0 degrees above the horizontal. The horizontal distance to the net is 7.0m and the net is 1.0 m high.
A 53.6 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 16.0° above the horizont, If the coefficient of static friction is 0.510, what minimum force magnitude is required from the rope to start the crate mo..
An electron and a proton are initially very far apart (effectively an infinite distance apart). They are then brought together to form a hydrogen atom, in which the electron orbits the proton at an average distance of 5.40 10-11 m. What is EPEfina..
Three blocks of mass m1=1.0 kg, m2=2.0 kg, and unknown mass m3 are on a frictionless forizontal surface, What is the unknown mass m3
The generator of a car idling at 1200rpm produces 13.8V. What will the output be at a rotation speed of 2200rpm, assuming nothing else changes
You are to determine the power rating of the motor in an elevator system. The elevator (with a full load) weights 2000 kg and is required to move upward 3 m/sec at constant speed.
Consider a dry air parcel initially at the surface (T=25 degrees celsius and p=980mb) that rises adiabatically to a final location at 900mb
What is wavelength in meters of an electron
A hydraulic jack is made with a small piston 1.1 cm in diameter that is used to move a large piston 5.3 cm in diameter. how heavy a load can he lift with the jack
Three resistors with values 1.2 , 2.3 , and 5.0 , respectively, are connected in parallel in a circuit with a 5.0 V battery, what is the pwer delivered to the 5 ohm resistor
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