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The electrical resistance on a long piece of wire is R. The wire is streatched to be twice as long, and because the volume doesnt change its cross-sectional area is halved. The electrical resistance of the stretched wire is:
a. R/2
b. R
c. 2R
d. 4R
What is the potential difference in volts between the plates.
Consider an unpolarized lightwave incident from air onto a planar dielectric material of index of refraction 1.50. Calculate the degree of polarization of the transmitted beam in part b above
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The edge of the thimble of a micrometer moves a distance of 2.0 mm when it is given four complete revolutions. Find the pitch of the micrometer
An electromagnetic wave has an electric field amplitude of 320 V/m.
A child playing in a swimming pool realizes that it is easy to push a small inflated ball under the surface of the water while a large ball requires alot of force. calculate the diameter of the ball
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jamie is playing tennis. a 0.057kg ball is coming towards her at a velocity of -14 ms. after she hits it in the exact
A man pushes a box of mass M with a force F using a stick AB of mass m and making a angle θ with the vertical. The coefficient of friction between the box and the floor is μ. Draw a clear diagram showing all the forces.
An electron initially at rest is accelerated between two parallel plate 2.000 cm apart, What kinetic energy does the electron have when it hits the positive plate
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