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A swimmer heads directly across a river, swimming at2.80 m/s relative to still water. He arrives at a point 49.0 m downstream from the point directly across the river, which is 73.0m wide.
Discover:
1. What is the speed of the river current?
2. What is the swimmer's speed relative to the shore?
3. In what direction must the swimmer head so as to arrive at the point directly opposite his starting point? Express your answer in terms of the angle by respect to a line drawn directly across the river.
A spaceship is going to park between two stationary planets C and D that are separated by 20 meter. Determine how far from planet C should the spaceship be
Two simple pendulums have length of 81-cm and 64-cm they are released from the same angular position at the same instant. After how much time would they both arrive at their initial position simultaneously.
An unhappy rodent of mass 0.310kg , moving on the end of a spring with force constant 2.50N/m, If the constant b has the value 0.901kg/s, what is the frequency of oscillation of the mouse
Work function of potassium is 2.25 eV. Find the cutoff wave length of potassium
A charge q = 2.00 uC is placed at the origin in a region where there is already a uniform electric field E_vec = (100 N/C)i_hat. Calculate the flux of the net electric field through a Gaussian sphere of radius R = 10.0 cm centered at the origin.Is it..
You are lowering two boxes, one on the top of the other, down the ramp by pulling on a rope parallel to the surface of the ramp.
Each second, 1.25 x 1019 electrons in a narrow beam pass through a small hole in a wall. find the magnitude of the magnetic field in the wall at a radius of 0.750 meter from the center of the beam
An air bubble is expelled by an underwater diver at a depth of 24.6 m. Find the final volume of the bubble if its initial volume is 11.4 cm3
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 hoodlum throws a stone vertically downward with an initial speed of 12.0 ms from the roof of a building 33.0 m above
The bungee cord acts just like a coil extension spring with constant k = 4 lbf/ft and its unstretched length is L= 6 ft. At first the cord is loosely dangling but then becomes taut and goes into tension as soon as the skaters
in a region where there is an electric field the electric forces do 7.85x 10-19 j of work on an electron as it moves
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