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A particle in the xy plane is attracted to the origin by a force F = -k/yr Calculate the work done by the force as the particle moves from the point x=0 y=b to the point x=2b y=0 along the path.
tests reveal that a normal driver takes about 0.75 s before he or she can react to a situation to avoid a collision. it
A disc of mass M and radius R is rolling purely without slipping with velocity V on a flat horizontal floor. When it hits a step in the floor of height R/2.what is the velocity of the center of mass of the disc just after impact.
A man observes snow falling vertically when he is at rest, but whenhe runs through the falling snow at a speed of 6.80 m/s, it appears to be falling at an angle of28.0° relative to the vertical. Find the speed of the snow relative to the earth.
The collision between a hammer and a nail can be considered to beapproximately elastic. Estimate the kinetic energy acquired by a 10.2 g nail
You are in charge of the construction site of a new dam. Extremely heavy rainfall starts and Bureau of Meteorology hydrologists tell you that beginning at about 8 AM, 2 GL per hour (2 x 10^6 meters^3 per hour) will flow into the dam. The lake behi..
the uniform beam below is 4.0meters long and has mass 30.0kg. Find the tension in the rope and the force exerted by the building on the beam by the building
A supermassive black hole passes through the edge of the solar system 1.20 x 10^13 m away. What is the mass of the black hole
The hot reservoir for a Carnot engine has a temperature of 943 K, while the cold reservoir has a temperature of 495 K. The heat input for this engine is 5280 J. The 495-K reservoir also serves as the hot reservoir for a second Carnot engine.
When four people with a combined mass of 305 kg sit down in a 2.0 103-kg car, The four people get out of the car and bounce it up and down. What is the frequency of the car's vibration
The position of a 9x10-31kg particle is given by: x(t)=3t2x+4ty where x and y are unit vectors. What is the force acting on the particle
A boat crosses a 500 m river. The water run at 5.9527 m/s due east. The boat is able to travel at 5 m/s relative to the water. what is the net displacement along the river bank
Given that hbar = 1.055*10^-34 J*s, find the wavelength in nm of light emitted from a hydrogen atom when its electron moves from the n=6 state to the n=2 state. What is the minimum uncertainty in the momentum of the electron
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