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You are pulling a crate across the floor. The block has a mass of 65.0 kg. You exert a horizontal force of 140. N to the right. Friction exerts a force of 92.0 N to the left. What is the magnitude and direction of the acceleration of the crate?
Small particles suspended in the air have a v_rms = 2.8 x 10^-3m/s. What is the mass of one of the small particles
A 280-kg piano slides 4.3 m down a 30o incline and is kept from accelerating by a man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction is 0.40.
A source emits sound uniformly in all directions. There are no reflections of the sound. At the distance r1 from the source the sound is 3.9 dB louder than it is at a distance r2 from the source. What is the ratio r1/r2.
A particular organ pipe can resonate at 213 Hz, 355 Hz, and 497 Hz, but not at any other frequencies in between. What is the fundamental frequency of pipe.
White light, with frequencies ranging from 4.20×1014 Hz to 7.74×1014 Hz, is incident on a calcium surface. Calculate the lowest frequency for which no electrons are ejected
A two-slit pattern is viewed on a screen 1.04 m from the slits. what is the total width of the central bright fringe?
When blue light with a wavelength of 471nmilluminates a diffraction grating, What is the maximum spacing between lines on this grating
A locomotive accelerates a 25-car train along a level track. Every car has a mass of 7.6 ? 104 kg, What is the tension in the coupling between the first car and the locomotive
A tennis player standing 10.7 m from the net hits the ball at 2.50° above the horizontal. how fast was the ball moving when it left the racquet
Considered frequency and draw the nodal maps
An extremely light rod 1.00 m long has a 2.00-kg mass attached to one end and a 3.00-kg mass attached to the other. find the moment of inertia of the system about the fixed axis
A sport utility vehicle (SUV) and a sports car travel around the same horizontal curve. The SUV has a static stability factor of 0.80 and can negotiate the curve at a most speed of 18 m/s without rolling over.
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