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A father racing his son has half the kinetic energy of the son, who has one-third the mass of the father. The father speeds up by 3.0 m/s and then has the same kinetic energy as the son.
(a) What is the original speed of the father?
m/s
(b) What is the original speed of the son?
A standard baseball has a circumference of approximately 23 cm. If a baseball had the same mass per unit volume as a neutron or a proton, about what would its mass be?
Evaluate with the strength of the earth's gravity at its surface, how much weaker is gravity at a distance of 10 earth's center.
How thick should the air layer be between two flat glass surfaces if the glass is to appear bright when 530 light is incident normally.
What is the magnitude of the torque exerted by the entire flagpole at the point of contact with the building.
A fire hose ejects a stream of water at an angle of 31.20° above the horizontal. The water leaves the nozzle with a speed of 24.50 m/s. assume that the water behaves like a projectile, how far from a building should the fire hose be located to hit..
Using and Atwood machine with masses m1 and m2, at first with m1 a distance 2h above m2, what is the speed of either mass they pass each other? Make use of energy to solve (hint they cross halfway between the starting positions of the two masses).
At a right angle to a magnetic field. The acceleration of gravity is 9.81 m/s2. What is strength of the magnetic field necessary to exactly balance the weight of the proton and keep it moving horizontally.
A silicon sample is doped with phosphorus at 1.23 parts per million. Phosphorus acts as an electron donor, Calculate the number of free electrons per unit volume of the doped silicon.
A large circus ride has a centripetal acceleration at 6.0 m/s2. If the circular ride has a radius of 11.0 m, what is its velocity at the edge
what is the frequency of vibration of the string. If the shot was launched from 6.00 f above the ground at an initial angle of 42.0 degrees , what was its initial speed.
What is vertical component of the acceleration
How high is the top of the ski lift relative to the base.
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