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A 60 kg student is standing on a skateboard near a wall and pushes on the wall with a force of 120 N. How hard does the wall push back on the student? What is the student's acceleration?
A fan rotating with initial velocity! = =2rad=s comes to complete stop after15:5 turns, Find the time it takes the fan to stop
Two sinusoidal waves of the same period, by amplitudes of 3.5 and 6.0 mm, travel in the same direction along a stretched string; they produce a resultant wave by amplitude of 9.119 mm. The phase constant of the 3.5 mm wave is 0. What is the stage con..
If an automobile rounds this curve at 30 {rm m/s}, illustrate what is the minimum coefficient of static friction between tires and road needed to prevent skidding?
Light of wavelength 420 nanometer is incident normally on a diffraction grating. The ninth-order maximum of the diffraction pattern is observed at 32.0o. Find the density of rulings for the grating
An emf source with a magnitude of = 120 , a resistor with a resistance of = 91.0 , compute the magnitude of the charge on each plate of the capacitor
A Metra train is moving at a speed of 25.0 m/s. As it approaches astation its horn emits a sound of frequency 750. Hz. Calculate the frequency detected by a personstanding still at the station.
A railroad car of mass 2.1 104 kg moving at 2.50 m/s collides and couples with two coupled railroad cars, What is the speed of the three coupled cars after the collision
Bob is standing 1.00m above the ground. he is holding an RPG at an angle of 30 degrees. how far from Bob will the missle land
A heat engine using a diatomic ideal gas goes through the following closed cycle: Isothermal compression until the volume is halved. What is the thermal efficiency of this heat engine
an axon is the relatively long tail-like part of a neuron or nerve cell. the outer surface of the axon membrane
A centrifuge in a medical laboratory rotates at an angularspeed of 3600 rev/min. Find the constant angular accleration of the centrifuge
A single pane of glass @c = 0.50 Btu/(h ft OF)] 1/4-in. thick separates the air in a room which is at a mixing cup temperature of 700F from the outdoors.
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