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A bullet is shot out of a gun with a 61 cm barrel at a speed of 410 m/s into a block of wood. The bullet enters the wood 13 cm. What force does the block exert on the bullet? What is the time it takes?
A circular disk has surface charge density 8.0nC/cm^2. What will the surface charge density be if the radius of the disk is doubled? Express your answer to two significant figures and include the appropriate units.
This is because of the average release of about 0.03 J per kilogram each year. Show that at 500 C increase in temperature for a thermally insulated chunk of granite takes about 13.3 million years. (Assume that the specific heat of capacity c of g..
plan a free-body diagram of the wire and bird system. How much tension does the bird produce in the wire? Ignore the weight of the wire.what is the rotational inertia of the wheel.
A glider moves frictionlessly along an air track that has been tilted by 1.5 inches over a span of 1.00 meters. Illustrate what is the expected acceleration of the glider.
A child, hunting for her favourite horse, is running on the ground around the edge of a stationary merry-go-round. The angular speed of the girl has a constant value of .250 rad/sec.
A cement block accidentally falls from rest from the ledge of a 74.8-m-high building. When the block is 18.4 m above the ground, a man, 2.10 m tall, looks up and notices that the block is directly above him. How much time, at most, does the man have ..
Electrons are ejected from a metallic surface with speeds ranging up to 4.60 × 105 m/s when light with a wavelength of 625 nm is used. a)What is the work function of the surface? b) What is the cutoff frequency for this surface?
An airplane must reach a speed of 377mi/h in order to take off. If the runway is 403 m long, what is the minimum value of the acceleration that will allow the airplane to take off successfully.
Two parallel, uniformly charged, infinitely long wires carry opposite charges with a linear charge density ? = 2.15 ?C/m and are 6.69 cm apart. What is the magnitude of the electric field at a point midway between them and 54.3 cm above the plane ..
A. how much time does the car take to travel between the two points? B. what is the displacement between the starting and ending points? C. what is the average velocity? D. What is the change in velocity? What is the average (vector) acceleration?
A Toyota Prius driving north at 61 and a VW Passat driving south at 42 are on the same road heading toward each other.
A person driving her car at 57km/h approaches an intersection just as the traffic light turns yellow. She knows that yellow light lasts only 2.0 s before turning to red, and she is 30m away from the near side of the intersection.
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