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Assignment
Answer the following three questions
1) How would you explain the wave-particle dualism? Provide your explanation by referring to the Young's experiment (two-slits experiment) and the De Broglie equation.
2) Explain the photoelectric effect, by referring to the experiment set up and the physics behind it. In particular, explain the concepts of work function, activation frequency and photon flux.
3) According to the Kronig-Penney model used to derive the band theory of solids (non metals), how would you explain the presence of energy bands in a material, such as a semiconductor? Sketch an example of a 4 bands E vs k diagram within the Brillouin zone. One of the interesting concepts related to the E vs k diagram is the effective mass concept. Explain this concept and how it is related to the diagram.
An electric dipole includes a charge of 4 ?C and a second charge. What is the total charge of the dipole
Adult cheetahs, the fastest of the great cats, have a mass of about 7 kg and have been clocked at up to 70 mph 31m/s. By what factor would its kinetic energy change if its speed were doubled
A traveler first drives 18.8 km east, then 31.8 km southeast, and finally 11.1 km south. Find the traveler's total displacement
The electric potential at a position located a distance of 21.0 mm from a positive point charge of 6.90×10-9C, Calculate the value of the second charge
A set of crash tests consists of running a test car moving at a speed of 13.0 m/s (28.6 m/h) into a solid wall. Calculate the size of the average force which acts on the dummy during that time
The density of concrete is 2400 kg/m3 and the spring constant for the soil is found to be 80 3 106 N/m. The geometry of the compressor leads to choosing a block that is 1.5 m by 1.5 m. Determine the depth h that will reduce the force transmitted t..
If the rod is moving to the right at a velocity v, would there be a current? Explain. If so, determine the direction of the current.
A boat is to cross a river on a course directed 20 degree north of east in 10 min from point A to point B. determine what must be its speed relative to the moving water
work of 600 j is done by stirring and insulated beaker containing 100 gm of water?what is the internal enery of the
The block is in its equilibrium position when it is struck from below by a hammer which imparts to the block an upward velocity of 90 in./s.
A playground merry-go-round has a disk-shaped platform that rotates with negligible friction about a vertical axis. how fast will the disk be turning
The escape velocity of a bullet from the surface of planet Y is 1727 m/s. Calculate the escape velocity from the surface of the planet X if the mass of planet X is 1.490 times that of Y, and its radius is 0.8790 times the radius of Y (in m/s).
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