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Steven and Danny are standing apart from each other throwing a ball. Steven throws the ball to Danny and Danny throws it back immediately. Steven throws the ball with a velocity of 5.00 m/s and after 2.9 s he got the ball back. Suppose there's no deceleration of the ball when it's moving and that we can neglect the time for Danny to throw the ball. The speed of the ball when it is thrown back to Steven was 3.30 m/s. How far are they apart from each other?
A satellite has a mass of 95 kg and is located at 1.99 106 m above the surface of Earth. What is the magnitude of the gravitational force on the satellite
A round loop of diameter 12 cm, carrying a current of 0.40 A, is placed inside a magnetic field B = 0.20 i T + 0.40 j T. What is the potential energy of the loop
A 1000 kg roller coaster car starts from rest from a hilltop 60.0 m above the ground and moves (without power) down, what is the average frictional force between the car's wheels and the track
A uniform electric field exists in the region between two oppositely charged parallel plates 1.67cm apart, Find the speed of the proton at the moment it strikes the negatively charged plate
The drawing shows two situations in which charges are placed on the x and y axes. find the magnitude of the net electric field at the origin
A rope applies a horizontal force of 180N to pull a crate a distance of 2m across the floor A frictional force of 60N opposes this motion.
A (perfect) transformer has 20 V and 2 A in its primary coil, 200 turns in its primary circuit, and 20 in its second. How much power is in the secondary circuit
A football quaterback runs 15.0 m staright down the playing field in 2.50s. what are the average velocities for the three intervals
You measure an electric field of 1.32*10^6 N/C at a distance of 0.156m from a point charge. What is the magnitude of the charge
A crate with mass 36.0 initially at rest on a warehouse floor is acted on by a net horizontal force of 142. Explain how far does it travel in 12s and what is its speed at that time?
Light of wavelength 5.60 multiply.gif 102 nm passes through a slit of width 0.180 mm. Determine the width of the first-order bright fringe
The dimensions of the picture on a 35.0{\rm mm} color slide are x = 24.0{\rm mm} {\times}y = 36.0{\rm mm}. What are the dimensions of the image on the screen
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