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1) An atom originally in an energy level with E = -8.85 eV absorbs a photon that has wavelength 738 nm. What is the internal energy of the atom after it absorbs the photon?
2) An atom initially in an energy level with E =-1.23 eV emits a photon that has wavelength 360 nm. What is the internal energy of the atom after it emits the photon?
A small plane is dropping emergency supplies to a fishing boat that has been blown out to sea. How far from the boat will the supplies land
A woman inside an elevator is standing on a scale. Before the elevator starts moving the scale shows 50 kg, calculate the acceleration of the elevator if after the elevator starts moving upward the scale reads 70kg. What will the reading of the sc..
An airtight box has a removable lid of area 1.00 10-2 m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 7.00 104 Pa. The inside of the box is completely displaced. What is the magnitude of the force es..
Two parallel wires of length 17 m are separated by a distance of a = 0.13 cm, What is the magnetic force on each wire
A large wooden turntable in the shape of a flat uniform disk has a radius of 2.00 m and a total mass of 120kg. The turntable is initially rotating at 3 rad/s about a vertical axis through its center.
White light reflected at perpendicular incidence from a uniform soap film has an interference maximum at 600. nm and a minimum at 450. nm, what is the film thickness
an icy road has coefficient of static friction of 0.150. if the road is flat what is the maximum speed that a car can
a wheel rotates with a constant angular acceleration of 4.00 rads2. assume the angular speed of the wheel is 2.30 rads
a dragster accelerates to a speed of 112 ms over a distance of 398 m. determine the acceleration assume uniform of the
Two 8.00mm x 8.00mm electrodes with a 0.10-mm-thick sheet of Mylar between them are attached to a 8.0V battery. Without disconnecting the battery, the Mylar is withdrawn. (Very small spacers keep the electrode separation unchanged.) Dielectric consta..
A 1000-kg car is moving at 30.0 m/s around a horizontal curve whose radius is 100 m. What is the magnitude of the frictional force
A certain laser outputs pure blue light (photon energy 3.1 eV) with power 400 milliwatts (0.4watts). How many photons per second does this laser emit
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