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A crate of mass m = 92 kg is pushed at a constant speed up a frictionless ramp (? = 29°) by a horizontal force . The positive direction of an x axis is up the ramp, and the positive direction of a y axis is perpendicular to the ramp. (a) What is the magnitude of F ? (b) What is the magnitude of the normal force on the crate?
A certain automobile can decelerate at |a1| = 1.6 m/s2. Traveling at a constant v1 = 29 m/s, this car comes up behind a car traveling at a constant v2 = 4 m/s. What is the speed of the faster car relative to the slower car
A block is on a horizontal surface (a shake table) that is moving back and forth horizontally with simple harmonic motion of frequency 2.3 Hz. How great can the amplitude of the SHM be
At t = 0, an automobile travelling north begins to make a turn. It follows one-quarter of the arc of a circle of radius 10.70 m until, at t = 1.60s, it is travelling east. The car does not alter its speed all through the turn.
Light of wavelength 5.30 102 nm passes through a slit of width 0.210 mm. Determine the width of the first-order bright fringe
How does size effect fluorescence or emission from quantum dots and what you know about single quantum dot experiments for Nitride based quantum dot materials - as outlined in the lectures
Light from an argon laser strikes a diffraction grating that has 5395 grooves per centimeter. Determine the wavelength of the laser light
A block of mass 16.7 kg supported by a vertical massless cable is initially at rest. estimate the magnitude of the net force acting on the mass
A charge of 27.0nC is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 4.00×104 N/C. What work is done by the electric force
As soon as a traffic light turns green, a car speeds up from rest to 59.0 mi/h with constant acceleration 7.00 mi/h/s. For what time interval is the bicycle ahead of the car
A certain system has 6x10^24 degrees of freedom and its internal energy increases by 1%, then what is the increase in the system's entropy
An astronaut with a steady heartbeat of 57 beats per minute travels at a constant speed of 0.91c, relative to earth. what was the heart rate
An astronaut on the planet Zircon tosses a rock horizontally with a speed of 6.95 . The rock falls through a vertical distance of 1.20 and lands a horizontal distance of 8.65 from the astronaut. What is the acceleration of gravity on Zircon?
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