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A 400 g baseball thrown with a velocity of 40 m/s is hit straight back at the pitcher with a velocity of -50m/s. What is the change in momentum of the ball? What is the impulse exerted on the ball by the bat?
Calculate the position that a lens should be placed in order to achieve the maximum magnification. The length between the object plane and the image plane is 50cm and are fixed ( meaning they are restricted). Only the lens can be moved. The focal ..
The radius of the loop is 550km. R=550km. Determine the minimum height above the top of the loop from which the ball must be released in order to "just" pass through the top of the loop.
An electron is moving at a speed of 1.1 multiply.gif 104 m/s in a circular path of radius of 1.9 cm inside a solenoid. Find the strength of the magnetic field inside the solenoid
Find the resistance of the following. Power ratings are based on the assumption of a potential difference of 120 V, rms across the terminals.
When certain light rays pass from a vacuum into a block of an unknown material, What is the speed of light inside the block
a 142 kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizantal is increased to ALPHA, If the coefficient of static friction between the crate and the ramp is 0.65, what is the angle alpha when the crate just begins t..
an oil film n 1.46 floating on water is illuminated by white light at normal incidence. the film is 283 nm thick.a
A 3.0-kg and a 5.0-kg box rest side-by-side on a smooth, level?oor. A horizontal force of 32 N is applied to the 3.0-kg box pushing it against the 5.0-kg box, How large is the contact force between the two boxes
An unknown material has a normal melting/freezing point of -25.1° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C°). What is the latent heat of fusion of the unknown material
Legolas shoots an arrow of mass 20 g horizontally into a baleof hay, striking the hay with a velocityof 60 m/s. What is the average stopping force acting on the arrow
Suppose a car is traveling at +21.1 m/s, and the driver sees a traffic light turn red, What is the stopping distance of the car, as measured from the point where the driver first notices the red light
A conducting spherical shell with a total uniformly distributed charge of -4Q on the combination of inner and outer surfaces has a point charge at the center of the shell
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