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A 10g bullet is fired horizontally into a 300g wooden block initially at rest on a horizontal surface and becomes embedded in it. The coefficient of friction between block and surface in 0.50. The combined system slides 4.0m before stopping. With what speed did the bullet strike the block?
In a needle biopsy, a narrow strip of tissue is extracted from a patient using a hollow needle. Rather than being pushed by hand, to ensure a clean cut the needle can be fired into the patient's body by a spring. Find the maximum speed of the needl..
a gymnast is performing a floor routine. In a tumbling run she spins through the air, How much time does this maneuver take
In an early test of sound propagation through the ocean, an underwater explosion of 1 pound of dynamite in the Bahamas was detected 3200 away on the coast of Africa
A uniform horizontal wire with a linear mass density of 0.50 g/m carries a 1.8 A current. It is placed in a constant magnetic field with a strength of 4.00 x10-3 T. The field is horizontal and perpendicular to the wire. Neglect the magnetic field ..
Compact fluorescent bulbs are much more efficient at producing light than are ordinary incandescent bulbs. They initially cost much more, but last far longer and use much less electricity.
A portable x-ray unit has a step-up transsformer, the 120 V input of which is transformed to the 100kV output needed by the x-ray tubr, what is the number of loops in the secondary
A down jacket has a surface area of 0.75 m2 and is filled with a 4.1 cm thick layer of down, At what rate is heat conducted through the coat
What is change in electrical potential energy of electron
A bat moving with a speed of 4.10 m/s and emitting sound of 31.0 kHz approaches a moth at rest on a tree trunk. What frequency is heard by the moth
A point source emits 86.9 W of sound isotropically. A small microphone intercepts the sound in an area of 0.231 cm2, calculate the power intercepted by the microphone
A ball is thrown 20.0 m/s at an angle of 40.0º with the horizontal. Assume the ball is thrown at ground level. How long does it take the ball to reach the wall
The horizontal surface is frictionless and the system is free from rest. Using energy concepts, determine the speed of m3 after it moves down a distance of 6.0 m.
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