The basis functions XA(1) and Xg(1) of the coordinates of electron 1 are chosen to be a normalized set of basis functions for the study of the electronic structure of a 1-electron homonuclear diatomic molecule with nuclei labeled A and B. It is found that the values of the integrals involving these functions are as follows: HAA= (xalh|xa) = HBB = (XBIÊ|XB) = – 1.5 hartee
HAB=(xalĤ|XB) = Hea= (x8\ÂIXA) = - 1.0 hartree
SAB = (XA|XB) = SBA = (xb|xa) = 0.2
Find the lowest electronic energy that can be computed with the variational principle using the trial function: 0(1) = CAXA(1) + C8X8(1) Your result corresponds to the energy of the bonding orbital.
a. 0.625 hartree
b. -2.083 hartree
c.-0.635 hartree
d. 1.263 hartree
e. -2.463 hartree

19. explain why a magnet from your refrigerator could not be used to lift something as heavy as a car. (chapter 7 – pages 202-203) 20. can a magnet ever have a single pole? explain your answer. (chapter 7 – page 208) 21. what happens to the wavelength of a wave if the frequency is increased? (chapter 9 – pages 280-281) 22. an ocean wave has a wavelength of 10 m and a frequency of 4.0 hz. what is the velocity of the wave? show the appropriate equation from your book and show your work with units. (chapter 9 – page 282) 23. as you sit outside, the sound of a siren becomes lower in pitch. is the emergency vehicle moving away from or towards you? explain how you know. (chapter 10 – page 315-316) 24. why are two astronauts in space unable to hear one another? (chapter 10 – page 307) 25. explain in at least 3 sentences how electromagnetic waves form. (chapter 11 – page 338-339) 26. using the chart on page 345 in your textbook, what are the three types of electromagnetic wave with wavelengths shorter than those of visible light. give an example of each. (chapter 11 – pages 345-351) 27. explain why a leaf usually appears to be green, but a rose typically appears red. (chapter 12 – page 373) 28. what is the difference in light that is refracted compared to light that is reflected? think in terms of speed of light as well as what happens to light waves when they interact with a medium. (chapter 12 – pages 369-370) 29. how are concave and convex lenses different? (chapter 13 – page 408-410) 30. what type of mirror is used in rearview mirrors in cars? why is it important that these mirrors have the warning, “objects in mirror are closer than they appear.”? (chapter 13 – page 405)

How would a small bar magnet be oriented when placed at position x?

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward