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During a violent storm, a car is struck by a failing high-voltage wire that puts an excess charge of -850 mircoC on the metal car.
a) how much of this charge is on the inner surface of the car?
b) how much is on the outer surface of the car?
Jack and Jill exercise in a 25.0-m-long swimming pool. Jack swims nine lengths of the pool in 159.5 seconds, while Jill, the faster swimmer, covers ten lengths in the same time interval. Find the average velocity and average speed of each swimmer.
What are the following values about the central axis at the instant the torque has been applied for 195ms? The angular momentum of disk.
A grinding wheel of radius 0.35 m rotating on a frictionless axle is brought to rest by applying a constant friction force tangential to its rim. The constant torque produced by this force is 75N · m. Find the magnitude of the friction force.
Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of an ultrasound waves themselves. What is a size of the smallest feature observable in human tissue while examined with 25 MHz ultrasound? The speed of..
A 70 kg bicyclist rides his 7.8 kg bicycle with a speed of 16 m/s. How much work must be done by the brakes to bring the bike and rider to a stop.
What is the current in the wire.
A 99 kg girl dives off a raft 2.25 square meters floating in a freshwater lake. By how much does the raft rise in cm
A physics book slides off a horizontal table top with a speed of 1.00m/s. It strikes the floor after a time of 0.390ss, Find the height of the table top above the floor
The pulley in the illustration is a uniform disk of mass 2.8 kg and radius 0.24 m, which is free to rotate without friction. What is the acceleration of the falling block
A very light rigid rod with a length of 0.523 m extends straight out from one end of a meter stick. Determine the period of oscillation of the system
A ranger in a national park is driving at 28.0 mi/h when a deer jumps into the road 225 ft ahead of the vehicle. After a reaction time t, the ranger applies the brakes to produce an acceleration of a = -9.00 ft/s2. What is the most reaction time a..
A straight, stiff wire of length 1.00 m and mass 21g is suspended in a magnetic field B = 0.58T. The wire is connected to an emf. How much current must flow in the wire and in what direction so that the wire is suspended and the tension in the sup..
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