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A 130-m-wide river flows due east at a uniform speed of 4.3 m/s. A boat with a speed of 7.3 m/s relative to the water leaves the south bank pointed in a direction 39o west of north. What is the (a) magnitude and (b) direction of the boat's velocity relative to the ground? Give the direction as the angle of the velocity from due north, positive if to the east and negative if to the west. (c) How long does it take for the boat to cross the river?
a 1.60 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 14.5 ms.
a proton moves through a magnetic field at 32.5 of the speed of light. at a location where the field has a magnitude of
q1. the wheel of the car has a radius of 0.340 m. the engine of the car applies a torque of 282 nbullm to this wheel
A 870.0 kg car travelling on a level road at 27.0 m/s(60.5 mi/hr) can stop, locking its wheels, in a distance of 61.0 m(200.1 ft). Find the size of the horizontal force which the carapplies on the road while stopping.
A common flashlight bulb is rated at 0.30 A and 2.8 V (the values of the current and voltage under operating conditions). what is the temperature of the filament when the bulb is on? The filament is made of tungsten
Compute the magnitude & direction of the current.
A ball rolls horizontally off a 45-m high cliff with vo=10 m/s. How far from the base of the cliff will it hit the ground, What is the angular acceleration of the tires
Some European trucks run on energy stored in a rotatingflywheel, with an electric motor getting the flywheel up to its topspeed of 200rad/s. What is the kinetic energy of the flywheel after charging
the work function for metallic sodium is 2.7ev.a at what distance beyond the surface of metallic sodium is the
A very long solenoid of circular cross section with radius R = 4.0 cm, is centered on, and has its length parallel to, the z axis. What direction is the force on the proton
How long does the total trip last
question1an elevator is being lifted up an elevator shaft at a constant speed by a steel cable. all frictional effects
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