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Positive charge Q is distributed uniformly along a thin plastic rod that forms one quarter of a circle in the third quadrant of the x-y plane. The circle has radius a and its center is at the origin.
1. What is the x-component of the resulting electric field at the origin? Express your answer in terms of the variables Q, a and appropriate constants.
2. What is the y-component of the resulting electric field at the origin? Express your answer in terms of the variables Q, a and appropriate constants.
A fan rotating at 20 rpm slows down by a constant acceleration and comes to a stop in a time of 4.7 s. What is its angular displacement in this time? Give your answer in radians, do not enter units.
Velma passes Mort at a speed of 0.75c. At this speed, the "time dilation factor" is 1.5. In other words, Mort observes a 1-second tick of Velma's clock to take 1.5seconds. assume that they are born at the same time, and that Mort observes himself ..
q1. assume it takes 7.00 min to fill a 30.0-gal gasoline tank.a. calculate the rate at which the tank is filled in
A point charge of +Q is placed at the center of a square, and asecond point charge of -Q is placed at the upper-left corner. It is observed that anelectrostatic force of 2.0 N acts on the positive charge at the center.
A skyrocket explodes just as it reaches the top of its trajectory at a height 1.31 km above the ground. With what speed was the shrapnel ejected by the explosion
q1. a planet of mass 6.00 1025 kg is in a circular orbit of radius 2.00 1011 m around a star. the star exerts a force
a 5.15e4 kg space probe is traveling at a speed of 11300 ms through deep space. retrorockets are fired along the line
q1. monochromatic light from a distant source is incident on a slit 0.750 rm mm wide. on a screen 2.00 rm m away the
A helicopter is ascending vertically with a speed of 5.00m/s . At a height of 120m above the Earth, a package is dropped from a window. Evaluate how much time does it take for the package to reach the ground?
An electric field of 220000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -10C at the spot.
When it rains water vapour in the air condenses into liquid water and energy is released. How much energy is released when 0.0244m of rain falls over an area of 2.59 x 10^6 m^2? If the average energy needed to heat one home for a year is 1.40 x 10^11..
a bullet of mass 0.024 kg is fired horizontally with a speed of 75 ms from a tall bridge. if the bullet is in the air
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