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Q. A boat moves through the water of a river at 10-m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.6-m/s, how long does it take the boat to make a round trip consisting of a 280m displacement downstream followed by a 280m displacement upstream?
What is the magnitude of the centripetal acceleration.
Two speakers, one directly behind the other, are each generating a 374-Hz sound wave. What is the smallest parting distance between the speakers that will generate destructive interference at a listener standing in front of them? Take the speed of so..
If the string is 9.5 long, has a mass of 30 and is pulled taut with a tension of 8.50, how much time does it take for a wave to travel from one end of string to the other?
You're driving down the highway late one night at 17 {rm m}/{rm s} when a deer steps onto the road 45 {rm m} in front of you. Your reaction time before stepping on the brakes is 0.50 {rm s} and the maximum deceleration of your car is 12 {rm m/s^2}..
Four particles with masses 9kg, 4kg, 9kg, and 3kg are associated by rigid rods of negligible mass as shown. Assume the system rotates in the yz plane about the x axis with an angular speed of 9 rad/s. Find out the moment of inertia of the system a..
What is size of the gravitational force on the moon
If you drop an aspirin and it takes 0.18 sec to hit the table, how high above the table was the aspirin when it released?
If the angle between wires supporting the street lamp is reduced to 110°, what is the tension in each wire.
Write down an expression for the efficiency of the air cart bumper in terms of the initial and final kinetic energy of the cart. What defines a collision as elastic or inelastic.
If the Hawaiian hot spot is a fixed hot spot, which of directions is closest to the direction that the Pacific Plate was apparently moving as the Emperor Seamount Chain formed.
Using energy considerations, compute the average force the beam exerts on the pile driver while the pile driver is brought to rest.
A 280-g block on a 52 cm long string swings in a circle on a horizontal, frictionless table at 95 rpm. What is the speed of the block.
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