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A 343-kg boat is sailing 17.0 ° north of east at a speed of 2.20 m/s. 33.0 s later, it is sailing 33.0 ° north of east at a speed of 4.20 m/s. During this time, three forces act on the boat: a 33.3-N force directed 17.0 ° north of east (due to an auxiliary engine), a 20.3-N force directed 17.0 ° south of west (resistance due to the water), and (due to the wind). Find the (a) the magnitude and (b) direction of the force . Express the direction as an angle with respect to due east.
This bat hears its own sound plus the sound reflected by the wall. Explain how fast should the bat fly in order to hear a beat frequency of 10.0Hz?
A 10g lead bullet at 23 degrees celsius slams into a stone wall. Assuming no loss of energy to the environment, how fast must the bullet be traveling
if a plane wave is reflected from the ocean floor at normal incidence with a level 20 db below that of the incident
A nonuniform, horizontal bar of mass is supported by two massless wires against gravity. Find the position of the center of mass of the bar
A truck of mass 9312 kg moving at a speed of 68.7 mph has lost its brakes. How far along the incline (?x) does the truck travel before it stops
One day when you come into physics lab you find several plastic hemispheres floating like boats in a tank of fresh water. Each lab group is challenged to determine the heaviest rock that can be placed in the bottom of a plastic boat without sinkin..
a 40 mh inductor with 3.5 resistance is connected in series to a 20 microf capacitor and a 60 hz 40-v rms source.
At a horizontal distance of 45m from a tree, the angle of elevation to the top of the tree is 26 degrees. How tall is the tree
Green light at 543 nm is diffracted by a grating with 3000 lines per cm. Through what angle is the light diffracted in the first order
how far apart must two objects be on the moon to be resolved by the eye? take the diameter of the pupil of the eye the
A person is pushing a uniformly-loaded 21.65 kg wheelbarrow along a plank that makes an angle ? = 27.0° with the horizontal. What is the total force the person must apply
astronauts use a centrifuge to simulate the acceleration of a rocket launch. the centrifuge take 20.0 seconds to reach top speed, what is the astronauts tangential acceleration during the first 20.0 s
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