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After walking across a dry carpet, there's a potential difference of 5500 V between your hand and the doorknob. As you reach toward the knob, a spark jumps, releasing energy 1.0 mu J.
a) How much charge was transferred? Express your answer to two significant figures and include the appropriate units.
b) Assuming all the charges were electrons, how many were there?
The mass of Pluto was not known until 1978 when a moon of Pluto was finally discovered. How did the discovery of this moon help
A planet of mass 7*10^24 is at location m A star of mass 8*10^30 is at location m. What is the force exerted on the planet by the star ?
A 0.20 kg hockey puck slides across a frictionless ice rink at a constant speed of 25 m/s. Ignoring air resistance, what is the work done on the puck while it is sliding
A 7700-kg boxcar traveling 18m/s strikes a second car. The two stick together and move off with a speed of 5.0m/s. What is the mass of the second car
According to kinematics(x=.5g*t2), the acceleration is dependant only upon. The mass of the object.
An electron moving along the x axis has a position given by x = 20te-4t m, where t is in seconds. How far is the electron from the origin when it momentarily stops
The current in a 120-V reading lamp is 1.8 A. If the cost of electrical energy is $0.070 per kilowatt-hour, how much does it cost to operate the light for an hour
A charged line extends from y = 2.50 cm to y = -2.50 cm. The total charge distributed uniformly along the line is -8.50 nC. Find the magnitude of the electric field on the x-axis at x = 10.0 cm
A building with a weight of 5.200e+7 N is built on a concrete foundation with an area of 1300 m2, By what vertical distance does the foundation compress
define the magnitude of the tension in the chain.
What is instantaneous acceleration
questionthree point charges are located on the y-axis a charge q at ya a charge -2q at the origin and a charge q at
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