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A bird sits on a high-voltage power line with its feet 5.2 cm apart. The wire is made from aluminum, is 2.9 cm in diameter, and carries a current of 154 A. What is the potential difference between the bird's feet?
A string of a violin is 32 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 7.2 x 10-4 kg/m. What are the wave speed and the tension in the string
Consider an airplane of wing area 6.8 m^2 (both wings combined) flying through air of density 1.13 kg/m^3. What is the net upward lift force on the plane
A spaceship is coming directly toward you while you are in the international space station. You are told that the spaceship is shining sodium light. You have an apparatus that and resolve two closely spaced wavelengths if the difference is 0.55 nm. I..
A horizontal force of with a magnitude of F = 220 N is applied to block 1, What is the magnitude of the net force on the middle block
A test tone used on a radio has a frequency of 951 Hz. What is the wavelength of this sound in air at normal room temperature
Four identical charges (+3.0µ C each) are brought from infinity and fixed to a straight line. Determine the electric potential energy of this group
Two students perform an experiment with a train and a ball. Michelle rides on a flatcar pulled at 8.35 m/s by a train ona straight, horizontal track. What was the initial speed of ball as seen by Gary
A 10-kg bullet is fired horizontally into a 300-g wooden block initially at res on a horizontal surface and become embedded in it. The coefficient of friction between block and surface is (0.50).
A physics student has designed a winter game. He has a platform 4.6 meters high with a rope tied to a tree at the same height, how fast are the boys and the sled moving after they "collide"
A soldier has a huge contraption that notches a large 4 kg arrow (it looks more like a lance) in a massive bow and uses a winch system to draw the arrow back to set the bow. What is the speed of the arrow
A 11.9-g mass is suspended 1.47 cm above a nonconducting flat plate, directly above an embedded charge of q. by how much will the mass be changed
two objects of unequal mass hung vertically over frictionless pulley of negligible mass. Determine the magnitude of the acceleration of the two objects
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