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1. When are photons likely to be emitted in the Franck- Hertz experiment?
2. Is an electron most strongly bound in an H, He+, or Li++ atom? Explain.
3. Why do we refer to atoms as being in the "ground" state or "stationary"? What does an "excited" state mean?
4. What lines would be missing for hydrogen in an ab- sorption spectrum? What wavelengths are missing for hydrogen in an emission spectrum?
5. Why can't the Bohr model be applied to the neutral He atom? What dif?culties do you think Bohr had in modifying his model for He?
6. Describe how the hydrogen atom might absorb a photon of energy less than 13.6 eV. Describe a process by which a 9.8-eV photon might be absorbed. What about a 15.2-eV photon?
A motor turning at 10 rad/s at a constant acceleration of 5 rad/s^2. Determine how many radians does it turn through while acceleration
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.138 N when their center-to-center separation is 67.1 cm. What was the negative charge on one of them
particle moves in a plane according to the equations of motion x = Rsin(?t) + ?Rt y = Rcos(?t) + R ; Find the instantaneous velocity and acceleration when the particle is at its maximum and minimum value of y
A spring has a spring stiffness constant, k, of 430 N/m. Obtain how much must this spring be stretched to store 50 Joule of potential energy
A beam of light originates from point P in a 3 mm thick glass block. It undergoes total internal reflection at point Q and strikes point R a distance d=5.4mm. If the glass block is in air, what is the glass' index of refraction?
The load and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 206 N. Find the length of the spring in this situation
A certain spring can withstand a maximum tension of 9.0 lbwithout breaking. What is the speed of the stone as the spring breaks
A large disk with a radius of 20 cm has a string attached to its edge, which is hanging over a table with a 200 g mass attached to it. determine the moment of inertia of the disk
Mercury has a mass MP = 3.18 x 1023 kg, an orbital period T = 88.0 days, and an orbital radius r = 5.79 x 1010 m. Assume the orbit of Mercury around the Sun is approximately circular.
A boy stands at a point 260 meter in front of the face of a sheer cliff. If the boy shouts, find how much time will elapse before an echo is heard
A 85 W sodiumlamp ( = 589nm) radiates energy uniformly in all directions. At what rate are photons emitted by the lamp
The energy stored in a C-C bond is 348 kJ*mol-1 and its length is 0.154 nm. Calculate its tensile strength
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