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A 150g ball has a kinetic energy 27.2J. What's the magnitude of its momentum? Next, use that answer to find its speed. Express your answers with the appropriate units.
Two point charges 1.6cm apart have an electric potential energy -160?J . The total charge is 25nC. What are the two charges
A 3.00 kg block is released from rest at the elevated end A of a frictionless track that slopes down to a point B and continues horizontally to a point D, Find the work done on the block by the normal force exerted by the track
A horizontal pipe shown in the figure has a cross-sectional area A1 = 37.5cm2 at the wider portions and A2 = 9.40cm2 at the constriction. Find the flow speed at the wide portion
q. a small block with a mass of 0.170 kg is attached to a cord passing through the hole in a frictionless horizontal
An electron, localized inside a 1D box (width = 0.6 nm) changes from the n=4 state to the lowest energy state and a photon is omitted as a result. What is the wavlength of the photon?
A beam of 12 cm microwaves strikes a surface glass with an index of 1.5 at an incident angle of 45 degrees. Compute the transmitting angle
A 100 arrow is shot perpendicularly from a bow whose effective spring constant is 500. If the bow is drawn 75 before shooting the arrow, to what height does arrow rise.
During a snowball fight, two snowballs travelling towards each other collide head-on. The first is moving east at a speed of 15.3 m/s and has a mass of 0.450 kg, What is the mass of the second snowball
In astronomy, distances are often expressed in light-years. One light-year is the distance traveled by light in one year
A cat is stuck in a tree. You are designated with the job to get it out, yet you do not want to climb the tree, because you may get stuck as well. What force does the seat exert on you
In the figure, a 4.0 kg block slides along a track from one level to a higher level after passing through an intermediate valley. The track is frictionless until the block reaches the higher level. There a frictional force stops the block in a distan..
Two blocks m1 = 9.8 kg and m2 = 4.0 kg are connected by a homogeneous rope that has a mass of mr = 1.32 kg. What is the magnitude of the tension in the rope
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