"What kind of electromagnetic radiation can be detected by a human body? I) visible light II) infrared light III) ultra-violet light IV) all other light 1. I and IV only 2. II only 3. I and II only 4. All of these 5. II, III and IV only 6. III and IV only 7. I and III only 8. I, II and III only 9. III only 10. I only"

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

The particle in a two-dimensional well is a useful model for the motion of electrons around the indole ring (3), the conjugated cycle found in the side chain of tryptophan. we may regard indole as a rectangle with sides of length 280 pm and 450 pm, with 10 electrons in the conjugated p system. as in case study 9.1, we assume that in the ground state of the molecule each quantized level is occupied by two electrons. (a) calculate the energy of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels. 9.27 electrons around the porphine ring (4), the conjugated macrocycle that forms the structural basis of the heme group and the chlorophylls. we may treat the group as a circular ring of radius 440 pm, with 20 electrons in the conjugated system moving along the perimeter of the ring. as in exercise 9.26, assume that in the ground state of the molecule quantized each level is occupied by two electrons. (a) calculate the energy and angular momentum of an electron in the highest occupied level. (b) calculate the frequency of radiation that can induce a transition between the highest occupied and lowest unoccupied levels.