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An electron in the third stationary state around a hydrogen atom has energy of -1.512 eV. What will the electron's energy be if the hydrogen atom absorbs a photon with a wavelength of 109 nm?
A woman inside an elevator is standing on a scale. Before the elevation it starts moving the scale shows 50 kg, calculate the acceleration of the elevator if when it starts moving upward the scale reads 70kg. What will the reading of the scale be ..
A rectangular loop of wire carrying a 4.0-A current and with certain dimensions is placed in a magnetic field of 0.60 T. What is the area of this wire
A child and sled with a combined mass of 48 kg slide down a snow-covered (and frictionless) hill. Find the kinetic energy at the top of the hill
Two tiny conducting spheres are identical and carry charges of -21.4C and +51.0C. They are separated by a distance of 3.30 cm. (a) What is the magnitude of the force that each sphere experiences?
A piece of chalk is thrown vertically upward and caught during its descent at the same height from which it was thrown. Position is measured from the location of the chalk when it left the hand. The positive direction for position, velocity, and ..
A distant galaxy emits light that has a wavelengthof 500.7 nm. On earth, the wavelength of this light ismeasured to be 503.7 nm. Find the speed of the galaxyrelative to the earth
A sprinter of mass 72.8 kg runs at a constant speed of 10.8 m/s in a straight line. Find the extra force the sprinter must exert on the ground to round a curve of radius 10.4 m
In Faraday's Law experiment, you will observe induced electromotive forces in a solenoid and compare their time dependences with those predicted by Faraday's Law
Smith is riding a mini kart and making a left turn on a banked curve. If the tire are bare (no friction ), what must the turning speed be so that the kart would not slide inward or outward
A 9.0*10^-2kg ice cube at 0.0 degrees celcius is dropped into a styrofoam cup holding .35 kg of water at 13 degrees celcius. Find the amount of ice (if any) remaining
A steel ball of mass M is released from rest at point P. It follows a smooth curved rail to point Q and finally reaches point R with K.E. of 7J. The speed of the ball at point Q is 2MS-1 and the height between point P and the ground is 3m. Then find ..
A 6 kg bowling ball with a radius of 12 cm rolls in a straight line past you at a speed of 3 m/s. What are the components of the ball's total angular momentum about your position
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