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Alpha particles of kinetic energy K are scattered either from a gold foil or a silver foil of identical thickness. Find the ratio of the number of particles scattered at angles greater than 90 degree by the gold foil to the same number for silver?
A 130g oscillator has a speed of 124cm/s when its displacement is 2.10cm, What is the oscillator's maximum speed
A 1055-kg van, stopped at a traffic light, is hit directly in therear by a 675-kg car traveling with avelocity of +2.45m/s. What is the final velocity of each vehicle
A(n) 0.47 kilogram soft ball is pitched at a speed of 20 m/s. The batter hits it back directly at the pitcher at a speed of 26m/s. Find the magnitude of the impulse imparted by the bat to ball
Assuming the can to be a cylinder with a height of 15cm and a diameter of 6.4cm , find the net inward force exerted on the vertical sides of the can due to atmospheric pressure
The power dissipated in a series RCL circuit is 89.6 W, and the current is 0.439 A. The circuit is at resonance. Determine the voltage of the generator.
during a violent thunderstorm hail the size of marbles diameter 0.800 cm falls at a speed of 13.0 ms. there are
An unstable particle is at rest and suddenlybreaks up into two fragments. What is thevelocity of the more massive fragment
A 2.52g bullet moving at 290 m/s enters and stops in an initially stationary 2.50 k/g wooden block on a horizontal frictionless surface. How much work was done in stopping the bullet
q1. a home fragment found in a cave believed to have been inhabited by early humans contains 0.21 times as much14c as
A positive point charge Q1 = 5.0*10-5 C is fixed at the origin of coordinates, Find the location(s) where the total electric field is equal to zero
an athlete executes a long jump leaves the ground at an angle of 25 degrees from the ground and lands 5.80m away.a what
To get up on the roof, a person (mass 70.0 kg) places a 6.00-m aluminum ladder (mass 10.0 kg) against the house on a concrete pad with the base of the ladder 2.00 m from the house. calculate the magnitudes of the forces on the ladder
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