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When electrons move from the fourth energy level to the second energy level, they emit visible light. Explain why the light emitted when an electron makes this move in a sodium atom is a different color than the light emitted by an electron moving from fourth to the second level of a hydrogen atom.
A square loop of wire consisting of a single turn is perpendicular to a uniform magnetic field. What is the flux that passes through the circular loop
A long vertical wire carries an unknown current. Coaxial with the wire is a long, thin, cylindrical conducting surface that carries a current of 75 mA upward. What is the size of the current in the wire
A student sits on a rotating stool holding two 2.9-kg objects. When his arms are extended horizontally, Find the kinetic energy of the student before and after the objects are pulled in
In figure, a ball isthrown up onto a roof, landing some time later at heighth = 20.0 m above and d = 30.0 m horizontally from the release point.The ball's path just before landing is angled at θ =60.0o with the horizontal roof.
Two identical +45.3 nC point charges A and B, with masses of 3.0*10^-9 kg each, are fixed in place with a distance of 2.54 cm between them. Calculate the speed of charge B when it has reached a distance of 3.68 cm away from charge A
Suppose the second distance d were traveled in the opposite direction; you forgot something and had to return home at the same constant speed as found in part (a). What is the average velocity for this trip.
The length of a certain wire is doubled and at the same time it's radius is reduced by a factor of 2
The left end of a long glass rod 8.00cm in diameter and with an index of refraction of 1.60 is ground, Find the position of the image of the arrow formed by paraxial rays incident on the convex surface
You are driving in one direction on a long straight road. You drive in the positive direction at 126 km/h for 30.0 minutes, How far did you drive
A person consumes a meal containing 17 kcal. What is the power this meal produces if it is to be "burned off" due to exercise in 6 hours
Calculate the force on an airplane which has acquired a net charge of 1650 µC and moves with a speed of 130 m/s perpendicular to the Earth's magnetic field of 5.0 *10^-5T
A transformer has 330 primary turns and 1340 secondary turns. The input voltage is 120 V and the output current is 15.0 A. What are the output voltage and input current
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