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A 2 kg mass is attached to a rope that that is swung in a horizontal circle with a circumference of 3 meters. What must be the tension in the rope so that the ball just misses the top of the 3 meter wall?
If friction and air resistance can be neglected, determine her speed vB when she reaches the horizontal end of the ramp at B.
Two high-current transmission lines carry currents of 25.0A and 75.0A in the same direction and are suspended parallel to each other 45.0cm apart. what magnetic force does each segment exert on the other
A spring with a spring constatn of 1200 N/m is placed at the bottom of an inclined plane with an angle of 30 degrees with the horizontal. how far up the incline plane will the block move before it stops
A 68.0-O resistor is connected in series with a 76.0-µF capacitor and a generator having a maximum voltage of 1.20 102 V and operating at 60.0 Hz
Two billiards of equal mass undergo a perfectly elastic head on collision. if the mass of ball 1 was initially was initially 5.00 m/s, and that of ball 2 was 6.00 m/s in the opposite direction, what will be their speeds after the collision? ball 1 m/..
500 kg satellite moves in a circular orbit of 4.8 x 106 m above the surface of the earth. What is the orbital speed of the satellite
an electron in an x-ray machine is accelerated through a potential difference of 1.00 X 10^4 V, What is the kinetic energy of the electron
When it rains, water vapor in the air condenses into liquid water, and energy is released. How much energy is released when 0.0429 m (1.69 inch) of rain falls over an area of 2.59×106 m2
A 7.80-g bullet moving at 610 m/s penetrates a tree trunk to a depth of 5.80 cm, Use work and energy considerations to find the average frictional force that stops the bullet
A block of metal has an actual weight of 45 N and an apparent weight of 25 N in water. What is the buoyant force from the water
A copper wire and an aluminum wire of the same length have the same resistance. What is the ratio of the diameter of the copper wire to that of the aluminum wire
A dance studio has flat mirrors on opposite walls, and multiple images are observed when a person stands between them, What is the image distance for the first image behind the north mirror
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