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A spring with an unstrained length of 0.071 m and a spring constant of 1.5 N/m hangs vertically downward from the ceiling. A uniform electric field directed upward fills the region containing the spring. A sphere with a mass of 5.5 × 10-3 kg and a net charge of +6.1 ?C is attached to the lower end of the spring. The spring is released slowly, until it reaches equilibrium. The equilibrium length of the spring is 0.060 m. What is the magnitude of the external electric field?
A person on a safari wants to take a photograph of a hippopotamus from a distance of 75.1 m. What would be the size of the image if a lens of 50.0-mm focal length were used
Determine the energy of the incident electron. How many coulombs of protons and electrons are in each penny.
A 2680 satellite used in a cellular telephone network is in a circular orbit at a height of 800 above the surface of the earth. What fraction is this force of the satellite's weight at the surface of the earth
1000 gallons per minute of fluid flows through a 3 inch diameter pipe. what is the average velocity of the water
A point charge q_1 = 4.15 nC is located on the x-axis at x = 2.10 m , and a second point charge q_2 = -6.25 nC is on the y-axis at y = 1.00 m. What is the total electric flux due to these two point charges
A wheel has a rotational velocity of 20·rad/s clockwise. You place you hand against the wheel and the friction between your hand and the rim stops it. How far does the wheel rotate while slowing to a stop
A ball of mass 0.45 kg is traveling with a velocity of 1.2 m/s north, 2.4 m/s east and 0.6 m/s up. What is the angular momentum of the ball with respect to the point at which the rope is attached to the post
q1. a juggler performs in a room whose ceiling is a height 3.0 m above the level of his hands. he throws a ball upward
An armada of space ships of proper length 1ly moves at a speed 0.8c relative to a space station. A delivery ship is to travel from the rear of the armada to the front at a speed 0.95c relative to the space station. Consider the space station's ref..
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3, Calculate the weight of the rod, w
What is the muzzle velocity
The best leaper in the animal kingdom is the puma, which can jump to a height of 3.7 m when leaving the ground at an angle of 45°. With what speed must the animal leave the ground
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