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A 66.0-kg skier starts from rest andslides down a 33.0-m frictionless slopethat is inclined at an angle of 15.0° with the horizontal.Ignore air resistance. >> If the slope is not frictionlessand the skier has a velocity of 4 m/s, what is the force offriction in (magnitude) N? What is the coefficient of kintetic friction?
a segment of wire supplying current to a motor of a submerged submarine carries 800A and feels a 3.6N repulsive force from a parallel wire 5cm away
Electrons in an x-ray tube are accelerated through 110 kV and directed toward a target to produce x rays. Calculate the power of the electron beam
A 0.8 kg mass is moving in a circle of radius 1.5 m on a flat frictionless table at the end of a string. The speed of the mass is 3 m/s. The string routes through a hole in the center of the table and is held by you underneath the table.
A Geiger counter consists of a tube of radius r and legnth L centered around a positively charged filament of equal length. What answer do you get for the linear charge density of the filament if you approximate its length to be infinite
A uniformly charged sphere has a potential on its surface of 450 V. What is the radius of the sphere
A 0.495-kg mass is attached to a horizontal spring with k = 105 N/m. The mass slides across a frictionless surface. Find the mechanical energy of the system
Consider the infinite square well of width a. V(x) is infinite out side well and zero inside. Discuss the importance of the quantum effects for both of these systems. Use the uncertainty principle to estimate the velocities of the electron and the me..
You are playing raquetball at the rec center. When you are 10 m away from the wall you hit a ball 26m/s towards the wall at an angle of 30 degrees. How long is the ball in the air before it hits the wall
Tritium ({}_1^3 {\rm{{\rm H})}} is an unstable isotope of hydrogen; its mass, including one electron, is 3.016049 {\rm u}. Determine the total kinetic energy of beta decay products
A semitrailer is coasting downhill along a mountain highway when its brakes fail. What was the truck's initial speed
This is a two part question. Ron runs west for 30 minutes at a speed of 8 mi/h. What is the total distance that Ron has run
Heather in her Corvette accelerates at the rate of (3.20i - 2.00j) m/s2, while Jill in her Jaguar accelerates at (1.00i + 3.20j) m/s2. How far apart are Heather and Jill
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