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The wavelength of violet light is about 430 nanometers, or 4.30*10-7 m. The frequency of the violet light reflected from a metal surface and thefrequency of the vibrating electron that produces it are the same. What is this frequency?
A 19.8-g piece of Styrofoam carries a net charge of -0.646 µC and is suspended in equilibrium above the center of a large, What is the charge per unit area on the plastic sheet
A 4lb block and a 13lb block, connected by a string slide down a 30 degree inclined plane. The coefficient of kinetic friction between the first block mentioned is 0.10; between the second block and the plane it is 0.20. Find the tension(in pounds) i..
A runner accelerates to a velocity of 5.36 m/s due west in 3 s. His average acceleration is 0.64 m/s2, also directed due west. What was his velocity when he began accelerating
A wheel of radius 1.6m rotates at a uniform speed. what is the point's tangential speed
How far up the incline will the skier move if the coefficient of kinetic friction between the skies and snow is 0.101
A rectangular object with mass m floats in water so that a fraction ? = 0.25 is submerged. What is the density of the object
You push on the chair with a force of = 37.0 directed at an angle of 43.0 below the horizontal and the chair slides along the floor. Using Newton's laws, compute the magnitude of the normal force that the floor exerts on the chair.
What is the velocity of a beam of electrons that go undeflected when passing through perpendicular electric and magnetic fields of magnitude 8.8 x 10^3 V/m and 3.5 x 10^-3T respectively
A device known as Atwood\'s machine consists of two masses hanging from the ends of a vertical rope that passes over a pulley. Assume the rope and pulley are massless and there is no friction in the pulley.
A meter rule is balanced at the 70 cm mark by placing a 200 g mass at the 80 cm mark. What is the mass of the ruler
Two wires are identical, except that one is gold (resistivity = 2.44×10-8 ?·m) and the other is NiChrome (resistivity = 1.10×10-6 ?·m). What is the resistance of the NiChrome wire
A magnetic field is passing through a loop of wire whose area is 0.018 m2. What is the average emf induced in the loop
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