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Q. A river flows due east at 1.43 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 10.5 m/s due north relative to the water.
(a) What is the velocity of the boat relative to shore?
(b) If the river is 261 m wide, how far downstream has the boat moved by the time it reaches the north shore?
The spring of the pressure gauge has a force constant of1000 n/m and the piston has a diameter of 2.00 cm as the gauge is lowered into water, what change in depth causes piston to move in by 0.50 cm.
A particle of mass M moves in one dimension along the positive x axis, under the influence of two forces. The first force is a constant force, with magnitude B and direction toward the origin. The second force is an inverse square law, with magnitude..
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 88.0 cm, what was the speed of bullet at impact with the block.
how much kinetic energy does each electron have. Blocks of mass m_1 and m_2 are connected by a massless string that passes over the pulley.
A uniform plank of length 5 m and weight 231 N rests horizontally on two supports, with d = 1.43 m of the plank hanging over the right support. To what distance, x, can a person who weighs 446 N walk on the overhanging part of the plank before it ..
The tape is now wound back into the drum at angular rate. With what speed would the end of the tape move? (Note that our drawing specifies that a positive derivative of implies motion away from the drum. Be careful with your signs. The fact that the ..
A force of 315 N is applied horizontally to a wooden crate in order to displac eit 35.0 m accorss a level surface at a constant velocity. As a result of this work the crate's internal energy is increased by an amount equal to 14 percent of the cra..
Assume someone drops an apple from a vertical distance of 6.0 meters, directly above the point where the arrow hits the tree.
Uniform rate of acceleration
A polar bear of mass 436 kg stands on an ice floe 58.10 cm thick. What is the minimum area of floe that will just support the bear in saltwater of density of 1030 kg/m3? The specific gravity of ice is 0.88.
A 1.02 liter flask contains a certain quantity of ideal gas at 315 K. Then an equal number of molecules of the same gas are added to the flask, after which the absolute pressure is 1.60 times its original value. What is a final temperature.
compute how much charge must be placed on the surface of a sphere of radius 0.31 m for the electric potential just above the surface to be 100 V. Assume that the charge is uniformly distributed.
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