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Light with a frequency of 2.99 x 1015 Hz ejects electrons from the surface of zinc, which has a work function of4.33 eV. What is the minimum de Broglie wavelength of the ejected electrons?
A football player runs the pattern by the three displacement vectors, , and . The magnitudes of these vectors are A = 4.00 m, B = 18.0 m, and C = 16.0 m. Using the component method, find out the (1) magnitude and (2) direction of the resultant vec..
An electron orbits a proton at a radius of 5.40 10-11 m. What is the magnitude of the magnetic field at the proton due to the orbital motion of the electron
Sound Check, a merchandising company specializing in home computer or speakers, budgets its monthly cost of goods sold to equal 70% of sales. Calculate the budgeted merchandise purchases.
An Earth satellite has a speed of 29500 km/hr when it is at its perigee, 230 km above Earth's surface. Find the apogee distance, the speed at apogee, and the period of revolution.
A fisherman accidentally steps off the ledge of a 4.0 meter-high dock and falls into the lake below the dock. what is the fisherman's speed on entering the water
A rocket ship is 45.0 m long according to measurements made in its rest frame, and moves at 0.385c by respect to the Earth. Astronaut Naomi sends a laser pulse from the tail of the rocket to the nose, where it reflects off a mirror, and returns to Na..
A 0.44-kg mass is hanging from a spring with spring constant 15 N/m. What is the resulting angular frequency of the oscillation
A 28.0-kg block is connected to an empty 2.46-kgbucket by a cord running over a frictionless pulley. Calculate the mass of sand added to the bucket
A 71-kilogram person stands on a bathroom scale in an elevator. Find what does the scale read if the elevator is ascending with an acceleration of 3.0 m/s2
A cube of aluminum has an edge length of 20 cm. Aluminum has a density 2.7 times that of water (1 gram/cm$) and a specific heat 0.217 times that of water (1 cal/g °C). When the internal energy of the cube increases by 47000 cal its temperature increa..
A "seconds pendulum" is one that moves through its equilibrium position once each second. (The period of the pendulum is precisely 2.000 s.) The length of a seconds pendulum is 0.9928m at Tokyo and0.9941m at Cambridge, England.
A 940 gram rock is whirled in a horizontal circle at the end of a 1.2 meter long string, find what angle does the string make with the horizontal
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