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The Earth can produce the downward electric field of 150 N/C around its surface. Assume this electric field is uniform through the atmosphere.
Estimate the net charge of the Earth.
The electric field at the height of 2.0 km from the surface of the Earth was measured 70 N/C. Estimate the volume charge density of atmosphere between that height to the ground.
Considering just the Sun and Jupiter, determine the radius of the circular orbit the Sun makes about the Sun-Jupiter center of mass
A ball of mass 4.9 g with a speed of 22.5 m/s strikes a wall at an angle 29.0o and then rebounds with the same speed and angle. compute the average force exerted by the ball on the wall
An object has a charge of -4.3 ?C. How many electrons must be removed so that the charge becomes +2.8 C?
a particle with a charge of 1.60*10^-19 and a mass of 1.67*10^-27kg is found moving in a uniform magnetic field of a strength 1.50T. calculate the kineic energy of the particle
A skateboarder shoots off a ramp with a velocity of 5.7 m/s, directed at an angle of 53° above the horizontal. how far is this point horizontally from the end of the ramp
An object is placed to the left of a convex lens and on the optical axis. find the magnification of the image formed by the lense
A 10.0-m long wire whose total mass is 39.5 grams is under a tension of 577N. Where do the pulses first meet
If wind blows at 32 m/s over a house, what is the net force on the roof if its area is 238 m2 and is flat
A 60.0-g object is attached to a horizontal spring with a force constant of 15.0 N/m, What is the velocity of the object when it is halfway to the equilibrium position if the surface is frictionless
How much force, in Newtons, is needed to accelerate a truck with a mass of 1500 kilograms from a full stop to 40 m/s in 10 seconds if the rate of acceleration is constant.
A cubical box .2 m on a side is completely immersed in a fluid. The pressure at the top of the box is 105 kPA, What is the denstiy of the fluid
An Olympic skier whose mass is 50 kg is moving at 25 m/s down a 20degree slope encounters a region of wet snow of coefficient of frictio Uk=0.55 which reduces her speed. Find the acceleration of the skier
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