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The work needed to remove an electron from the surface of sodium is 2.3eV. Find the maximum wavelength of light that will cause photoelectrons to be emitted from sodium. What will be the speed of emitted electrons if light with wavelength 200 nm is used?
An electron of kinetic energy 1.56 keV circles in a plane perpendicular to a uniform magnetic field. The orbit radius is 21.8 cm. determine the circling frequency
A 1x10^2-kg crate is being pushed across a horizontal floor by a force that makes an angle of 30.0° below the horizontal. The coefficient of kinetic friction is 0.25. What must be the magnitude of, so that the net work completed by it and the kine..
How much time is necessary to catch the car
A tire is filled with air at 15 oC to a gauge pressure of 220 kPa. If the tire reaches a temperature of 38 oC, How much energy do you need to boil off 2 kg block of ice
A parallel-plate capacitor has an area of 5.15 cm2, and the plates are separated by 1.05 mm with air between them. It stores a charge of 337pC. What is the potential difference across plates of the capacitor.
A radio with a resistance of 40 ohms and a clock with a resistance of 20 ohms are connected in series on a 120V, What is each power supplied to the circuit in the parallel case, How much power is dissipated by each componant
A 25.5-mW laser beam of diameter 2.08 mm is reflected at normal incidence by a perfectly reflecting mirror. Calculate the radiation pressure on the mirror
Suppose the highway is icy and the coefficient of friction between the tires and pavement is only one-third what you found in part A. What should be maximum speed of the car so it can round the curve safely?
The 95 mu F capacitor in a defibrillator unit supplies an average of 6500 W of power to the chest of the patient during a discharge lasting 5.0 ms
Consider a Boeing 777-200 airplane of wing span 60.93 m cruising horizontally at Mach 0.785 (about 828 km/h) due north in a region where the earth's magnetic field is .98*10
n = 3.78 mol of Hydrogen gas is initially at T = 366 K temperature and pi = 2.88×105 Pa pressure. How much work did the external force perform
The power output of a circuit is given by: P = i^2R = V^2/R = iV, Calculate the power output of each resistive element when a potential of 12 volts is applied
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