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A boat has a mass of 4710 kg. Its engines generate a drive force of 3610 N due west, while the wind exerts a force of 900 N due east and the water exerts a resistive force of 1960 N due east. Take west to be the positive direction. What is the boat's acceleration, with correct sign?
A 60 kg woman stands on a very light, rigid board that rests on the bathroom scale at each end. She is 1.5m away from one side and 0.5 m from the other.
A wire that has a resistance of 5 is passed through an extruder so as to make it into a new,What is the resistance of the new wire
A projector lens needed to form an image on a screen 10 times the size of its corresponding object. What is the required focal length of the lens
A simple pendulum consists of a ball of mass 5.00 kg hanging from a uniform string of mass 0.0510 kg and length L, determine the speed of a transverse wave in the string when the pendulum hangs vertically
a force of 500 N is requited to hold a spring in the state where it is compressed 0.1 m from its relaxed length. how much work was done to compress the spring
Two gravitational forces act on a particle, in perpendicular directions. To find the net force, can we add the magnitudes of those two forces?
βAn observer that is standing 12m from a stereo sound speaker perceives the sound level from the speaker to be 60 dβ. What is the decrease in the physical intensity in watts/m2
A uniform electric field with a magnitude of 250N/C is directed in the positive x direction. A 12uC charge moves from the origin to the point (20.0 cm, 50.0 cm). what is the change in electrical potential energy of the system as a result of the ch..
the speed of hockey pick decreases from 45.00 to 44.67 m/s in coasting 16 m across the ice. find the coefficient of kinetic friction between the puck and the ice
An engine is built to extract power from the temperature difference in the ocean. what is the maximum theoretical efficiency of such an engine
Expalin how many revolutions will the car have gone through when the magnitude of its total acceleration is 2.00 m/s^2?
Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. What is the net charge of all these electrons
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