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A river of width 31 m flows in a straight line (the x direction) with a speed of 0.21 m/s. A boat is rowed such that it travels directly across the river (along y). If the boat takes exactly 3.0 minutes to cross the river, what is the speed of the boat relative to the water?
A certain freely falling object, released from rest, requires 1.35 s to travel the last 24.0 m before it hits the ground. Find the total distance the object travels during the fall
A car is being pulled out of the mud by two forces that are applied by the two ropes shown in the drawing. The dashed line in the drawing bisects the 30.0° angle. The magnitude of the force applied by each rope is 2900 newtons (N).
a 6.00 kg bowling ball is rolling at 9.00 m/s. It collides with a 1.50 kg bowling pin at rest. What is the velocity of the ball after the collision
A long hollow cylinder has an inside radius a, an outside radius band is uniformly charged with a uniform charge density ρ. What is the electric field as a function of radius r? Includeanswers for r b.
A certain spring can withstand a maximum tension of 9.0 lbwithout breaking. What is the speed of the stone as the spring breaks
If a pump requires 9 ft (H2 O) NPSH and the liquid you are pumping has a vapor pressure of 4.5 psi at suction temperature. What suction pressure must you have to avoid pump cavitation
A rock is suspended from a scale reads 20.0 N. A beaker of water ( having a density of 1000 kg/m^3) is raised up so the rock is totally submerged in the water. The scale now reads 12.5 N. What is the density of the rock?
An unknown metal alloy is being tested to discover its thermal properties to see if it is suitable for use as a component in an aircraft wing. The alloy is formed into a bar measuring 1 meter in length, and is then heated from its starting temp. o..
A migrating bird is initially flying south at 10 m/s. To avoid hitting a high-rise building, What is the bird's average acceleration during this 2 s interval
question a 5 kg ball is thrown upward with an initial speed of 30 meters per second. suppose there is a constant air
In western movies, the hero sometimes detects an approaching trainby "listening" to the railroad tracks. If the tracks are made ofsteel, how many times faster does sound travel in the tracks thanin air?
A circular disk 0.3 in diameter, pivoted about a horizontal axis through its center , has a cord wrapped around its rim. what is the weight of the rod
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