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You are shining ultraviolet light on a gas of an unknown element. You know that an electron starts in a ground state with an energy of -13.10 eV. The electron absorbs a 4.00-eV photon. The electron immediately drops to an intermediate energy state Einter of energy -12.30 eV (in this case we will assume it emits a photon when it drops to the intermediate state, though most often the energy is lost through other means). The electron promptly drops back down to the ground state.
1) What is the energy of the state which the electron is in after absorbing the UV photon?
2) What is the energy of the first photon emitted?
3)What is the energy of the second photon emitted and is this process considered fluorescence or phosphorescence? (Both answers must be correct for the answer to be correct.)
The Doppler effect can be used to measure flow rates in blood. A sound wave is transmitted into a vein or an artery, What is the expected frequency shift
What is the energy density. Find out the lowest frequency that permits standing waves in both strings with a node at the junction. The standing wave pattern in each string may have a different number of loops.
A person is standing in an elevator that is stationary. What is the weight of the person when the velocity is 3 m/s upward and the acceleration is 2 m/s^2 downward
What are the two types of errors one encounters in experiments? Give an example of each, What does standard deviation of measured data tell you
A chair of weight 125 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 35.0 N directed at an angle of 42.0 below the horizontal and the chair slides along the floor. Using Newton's laws, compute..
Three light bulbs each with a resistance of 50W, are connected in series to a 100 V power supply. What is the current flowing through the third light bulb.
An automobile tire has a radius of 0.330 m, and its centre moves forward with a linear speed of v= 15.0 m/s. Find the angular speed of the wheel.
Compute the speed of the water just before striking the turbine blades (neglect air resistance).
A force F= (6x - 2y)N acts on a particle that undergoes a displacement delta r= (3x + y)m. Find (a) the work done by the force on the particle and (b) the angle between F and r.
On an airplane's takeoff, the combined action of the air around the engines and wings of an airplane exerts an 8020-N force on the plane, focussed upward at the angle of 55.0° above the horizontal. The plane rises with constant velocity in the vertic..
How to design atrium of a new building
A 2 kg projectile is fired with an initial speed of 135 m/s at an angle of 68° with the horizontal. At the top of its trajectory, the projectile explodes into two fragments of masses 0.72 kg and 1.28 kg. At 3.8 s after the explosion, the 1.28 kg f..
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