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A river with the width of 800 m flows due south with a speed of 2.0 m/s. A man steers a motorboat across the river; his velocity relative to the water is 4.2 m/s due east.
a. How far south of his starting point will he reach the opposite bank?
b. In which direction should the motorboat head in order to reach a point on the opposite bank directly east from the starting point with the same boat speed relative to the water of 4.2 m/s?
c. What is the velocity of the boat relative to the earth?
d. How much time required to cross the river?
A tsunami is generated by an earthquake off the coast of Alaska. It has a wavelength of 677 km. It travels at a distance of 3536 km in a period of 5.49 hr. What is the frequency of the wave in Hz?
find the lowest frequency that make constructive interference.
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A small solid sphere, with radius 0.25 cm and mass 0.56 g rolls without slipping on the inside of a large fixed hemisphere with radius 15 cm, What is its kinetic energy at the bottom
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A meter stick is found to balance at the 49.7-cm mark when placed on a fulcrum. What is the mass of the meter stick
In order to heighten your enjoyment of your 29-carat blue diamond, you view it through a lens held close to your right eye, estimate the focal length of the lens
Compute the value of Ra in terms of R1 and R2. how much energy must be added to a 2-kilogram pile of it to increase its temperature from 40*c to 50*c.
A farm tractor tows a 3550-kg trailer up a 18?incline with a steady speed of 3.0 m/s. What force does the tractor exert on the trailer
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