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In the "free electron molecular orbital" (FEMO) theory, the electrons in a conjugated molecule are treated as independent particles in a box of length L. Predict the minimum excitation energy in butadiene.The tetraene CH2=CHCH=CHCH=CHCH=CH2 can be treated as a box of length 8R, where R=140pm. Calculate the minimum excitation energy of the molecule.
A baseball pitcher delivers a fastball that crosses the plate with an angle of 5.77 degrees relative to the horizontal and a speed of 87.9 mph. What is the magnitude of the impulse received by the ball
At the bottom of its path, the ball strikes a 3.80 kg steel block initially at rest on a frictionless surface. The collision is elastic. Find out the speed of the ball just after the collision ?
A vertically positioned charged disk of radius R contains a unfirom positive charge density sigma. Find the expression for the angle theta made between the disk edge and the length L
The isotope 226 Ra Alpha decays. its measured atomic mass is 226.02541 amu, the daughter nucleus has a mass of 222.01758 amu and helium has atomic mass 4.0026 amu. calculate the kinetic energy of the alpha particle
A dockworker loading crates on a ship finds that a 18-kg crate, initially at rest on a horizontal surface, Find the coefficients of static and kinetic friction between crate and floor
In this problem you will consider the balance of thermal energy radiated and absorbed by a person. Find the net power radiated by the person when in a room with temperature . Express the net radiated power numerically, to the nearest 10 W
A transverse wave propagates in the positive x-axis with a wavelength of .3m and a period of .001s. What is the frequency and speed of this wave
Two masses, m1= 3.32 kg and m2= 5.00 kg are on a horizontal frictionless surface and they are connected together with a rope, What is the acceleration of the whole system, when this maximum force is appiled
A stunt car driver negotiates the frictionless track shown in such a way that the car is barely on the track at the top of the loop. The radius of the track is 9.9 m and the mass of the car is 1800 kg. Find the force of the car on the track when the ..
The longest "string" (a thick metal wire) on a particular piano is 2.0 m long and has a tension of 300.0 N. What is the total mass of the wire
A typical wall outlet voltage is 120 volts in the United States. calculate the number of turns on the secondary coil of the adapter transformer
A 50 hard-boiled egg moves on the end of a spring with force constant . It is released with an amplitude 0.300 . A damping force acts on the egg. After it oscillates for 5.00 , the amplitude of the motion has decreased to 0.100.
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