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A sample of hydrogen atoms is irradiated with light of wavelength 50 nm, which causes photoelectrons to be emitted. If each hydrogen atom is originally in its n=2 level, what is the kinetic energy (in electron volts) of these photoelectrons?
A 250g steel ball and a 500g steel ball each hang from 3.0-m-long strings. At rest, the balls hang side by side, barely touching. To What angle does each ball rebound
You are given a pendulum composed of a 0.038 kg mass on the end of a 0.6 m long massless string. compute the velocity of the mass as it passes through the vertical
A daredevil is shot out of a cannon at 43 degrees to the horizontal with an initial seed of 25m/s. A net is positioned at a horizontal distance of of 50m from the cannon from which it is shot. At what height above cannon should the net be placed i..
Two students are on a balcony 18.30 m above the street. One student throws a ball, b1, vertically downward at 16.80 m/s. At the same instant, the other student throws a ball, b2, vertically upward at the same speed.
A 6 ornament is hanging by a 1.30 wire when it is suddenly hit by a 3.00 missile travelling horizontally at 10.0. The missile embeds itself in the ornament throughout the collision.
A block of mass 2.0 kg oscillates on a spring with spring constant k= 5 N/M. what is the period of oscillation is rad/s?, what is the new period of oscillation
A sample of gas (? = 1.5) is taken through an adiabatic process in which the volume is compressed form 1600 cc to 400 cc. If the initial pressure is 150 KPa, what is the final pressure? How much work is completed on the gas in process.
The image of a very distant car is located 18 cm behind a convex mirror. What is the radius of curvature of the mirror
The coil is in a uniform magnetic field that is perpendicular to the plane of the coil. Illustrate what rate of change of the magnetic field strength will induce a current of 4.98 A in the coil?
Two blocks of weights 77.0 and 114.0 N are connected by as massless string and slide down an inclined plane making an angle of 45.0 deg, find the magnitude of the heavier block's acceleration
A penny of mass 3.10 g rests on a small 22.40 g block supported by a spinning disk of radius 11 cm. The coefficients of friction between block and disk are 0.715 (static) and 0.64 (kinetic) while those for the penny and block are 0.564 (static) an..
On a banked race track, the smallest circular path on which cars can move has a radius of 109 m, Find the largest speed at which cars can move on this track without relying on frictio
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