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The speed v of sound waves in air depends on the atmospheric pressure P and density r of the air. By using the method of dimensional analysis, find an expression for v in terms of P and r.
A traveler flew due east from city A to city B 150 miles away, and then made a connecting flight to city C 250 miles away in a direction that is 60o north of west, Find the net displacement of the person
A proton exeriences a magnetic field B= 1.9 X 10^-4i^ T and electric field E = 3.2 j^ N/C, what is the net force on the proton
A 0.30 kg puck, initially at rest on a frictionless horizontal surface, is struck by a 0.20 kg puck that is initially moving along the x axis with a velocity of 1.8 m/s. Find the fraction of kinetic energy lost in the collision
The density of the sea water is 1025 kg/m3. The density of ice is 917 kg/m3. Explain how high does the top of the ice block float above the water level?
Your friend's Frisbee has become stuck 19m above the ground in a tree. You want to dislodge the Frisbee by throwing a rock at it. If you release the rock 1.7m above the ground, with what minimum speed must you throw it
A small plastic sphere with a charge of - 5.0 nC is near another small plastic sphere with a charge of - 12 nC. what is the distance between the sphere
q1. when a surface is irradiated with light of wavelength 4950 a a photo current appears that vanishes if a retarding
Engineers have proposed that large flywheels be used for the temporary storage of surplus energy generated by electric power plants. What is the kinetic energy of rotation of this flywheel
W hat least energy an incident alpha particle must have to penetrate the gold nucleus. What is the direction of the carbon atom after the collision.
a layer of water covers a slab of material X in a beaker. A ray of light traveling upwards follows the path indicated. Find the angle the light makes with the normal in the air
A spring with spring constant 12.5 hangs from the ceiling. A 400 ball is attached to spring and allowed to come to rest. It is after that pulled down 6.80 and released. What is the time constant if the ball's amplitude has decreased to 3.90 after 57...
A cork ball of mass 1.20 g is placed between two very large horizontal planes of charge. The bottom plane has a uniform charge density of +0.68 uC/m2, What is the charge on the ball
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