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Two skaters, one with mass 65 kg and the other with mass 40 kgstand on an ice rink holding a pole of length 10 m and negligiblemass. Starting from the ends of the pole, the skaters pullthemselves along the pole until they meet. How far does the 40 kg skater move?
A net force of 132 N acts on a baseball (m=140g) for a period of 0.045s. What is the magnitude of the change in momentum of the ball?
You are sitting in a stationary boat and your friend is sitting in another boat nearby. Ocean swells (long waves) are passing by. What is the period of the swell
The Earth is showered with particles from space known as muons. They have a charge identical to that of an electron but are many times heavier (m = 1.88 · 10?28 kg). Suppose a strong magnetic field is established in a lab (B = 0.62 T) and a muon ente..
A 45 dB sound wave strikes an eardrum whose area is 4.1 × 10-5 m2. How much energy is received by the eardrum per second
At rush hour, the noise from a highway is 10^?4W/m^2 with 100 cars passing a given point a minute. How many cars are now driving on the highway
A spring of constant 290 N/m is used to launch a 1.2 kg block along a horizontal surface whose coefficient of sliding friction is 0.27
A tennis ball is struck at the base line of the court, 11.5 m from the net. The ball is given an initialvelocity with a horizontal component equal to 27.0 m/s at an initial elevation of 1.21 m.
A person travels by car from one city to another with different constant speeds between pairs of cities. Determine the average speed for the trip
An Elevator descended from rest on the 10th floor passing the 4th floor for a total distance of 22.5m. what was the velocity of the elevator as it passed the 4th floor
Two thin lenses with a focal length of magnitude 15.0cm , the first diverging and the second converging, are located 11.3cm apart. How far from this first lens is the final image formed
A flywheel with a radius of 0.310m starts from rest and accelerates with a constant angular acceleration of 0.660rad/s2, Compute the magnitude of the tangential acceleration, the radial acceleration
The current density from the axis in the wire of radius R is given by J = cr^0.5 (r is powered to one-half), Draw the current density as a function of r graph
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