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1a) What is the magnitude and direction of the electric field a distance of 5×10-7m from an electron?
b)How much charge would you have to put on a sphere of radius 30mm to get an electric field of 7.5×104NC-1150mm from the sphere?
2 Through what potential difference must an electron be accelerated for it to acquire a velocity of 1.5×107ms-1 ?
A defibrillator is used during a heart attack to restore the heart to its normal beating pattern. How many electrons pass through the wires connected to the patient
The potential for a mass hanging from a spring is V(y)=ky^2/2+mgy, when y=0 corresponds to the position of the spring when nothing is hanging from it. Find the frequency of small oscillators around the equilibrium point.
Aluminum's density is 2700 kg/m^3. An aluminum cube 3.4cm on a side is placed on a scale. What does the scale read when the cube is entirely in air
A thin, uniform rod is hinged at its midpoint. To begin with, one-half of the rod is bent upward and is perpendicular to the other half. What is the angular velocity of the straight rod
Two parallel wires are 5 m long. They are seperated by a perpendicular distance of 1 cm and carry currents of 20 A, Find the interaction force between the wires
A reporter in the press box looks at an angle of 10.0 below the horizontal to see second base, find the horizontal distance from the press box to second base
A person is making homemade ice cream. She exerts a force of magnitude 21 N on the free end of the crank handle on the ice-cream maker, what is the average power being expended
A horizontal circular platform rotates counterclockwise about its axis at the rate of 0.875 rad/s. You, with a mass of 69.5 kg, Calculate the total angular momentum of the system
Snowboarder Sherry of mass m is pulled up a slope at constant velocity v by a tow bar. The force of the tow bar is parallel to the slope, find the force that the two bar exerts on Sherry
The platter of a computer hard drive disk rotates at 5400rpm.
a person pulls a 10kg weight across a floor a distance x=2.0m by pulling on a rope with 50N directed 15 degrees above the horizontal. compute the work done by each one
A projectile is launched horizontally from a 30 m high cliff with a speed of 40.0 m/s. How far from the base of the cliff does the projectile hit the ground
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