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A large number of ground state electrons in a gas of hydrogen atoms are excited to the fourth excited state.
a. Determine how many energy did each electron gain?
b. Determine how many visible photos would be emitted by these electrons as they return to the ground state?
c. Determine the wavelength of the least energetic visible photon?
A 50.0-kg shell is shot from cannon at Earth’s surface to a height of 425 m. The system is the shell plus Earth, and the reference level is Earth’s surface. What is the change in the potential energy when the shell falls to a height of 225 m? What is..
An electron acquires 7.45 x 10^-16 Joule of kinetic energy when it is accelerated by an electric field from plate A to plate B. Find what is the potential difference between the plates
an astronomical unit au is the average distance of earth from the sun approximately 1.50 times 108 km. the speed of
A wheel accelerates from rest to 59 rad/s at a rate of 58 rad/s2, find what is the angular displacement of the wheel
A proton moves at 1.0x10^7 m/s perpendicularly to a uniform magnetic field. It experiences an acceleration of 2.0x 10^13 m/s^2 in the +x direction when its velocity is in the +z direction. Determine the magnitude and direction of the field.
A 3400 resistor and a 1.6 µF capacitor are connected in series across a generator (60.0 Hz, 120 V rms). Determine the average power dissipated in the circuit
A 10- kg uniform ladder, 5.0 m long, is placed against a smooth wall at a height of 3.1 m. Determine the force exerted on the wall by the ladder
A light bulb has a resistance of 260 . It is connected to a standard wall socket (120 V rms, 60.0 Hz, Determine the rms current in the bulb
Proton one moves twice as fast as proton two. The magnitude of the magnetic field in which proton one is immersed is twice the magnitude of the magentic field in which proton two is immersed.
A semi-trailer is coasting downhill along a mountain highway when its brakes fail. What was the truck's initial speed
In conducting circles, find where is the magnitude of the electric field the largest? Determine where is it the smallest
A uniform cylinder of mass m=8.26 kg and radius R=0.147 m is released from rest on an inclined plane (theta=42.4 deg), What is the magnitude of the angular velocity just before the cylinder reaches the horizontal surface
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