Physics, 25.07.2019 09:30 oranzajimenez
For her first trial, the student decided to mix 250 ml of water at 20°c with 250 ml of water at 98°c. after waiting some time, she recorded the temperature of the mix to be 56°c. what is the change in temperature of the cold and hot water
Answers: 1
Physics, 22.06.2019 02:30
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.
Answers: 1
Physics, 22.06.2019 05:40
Unpolarized light of intensity i_0=750w/m^2 is incident upon two polarizers. after passing through both polarizers the intensity is i_2=280w/m^2. (a) what is the intensity of the light after it passes through the first polarizer in w/m^2? (b) write an equation for the angle between the polarizers in terms of the initial (i_0) and final (i_2) intensities. (c) find the angle between the polarizers in degrees.
Answers: 3
Physics, 23.06.2019 03:40
What does every magnet possess? a. iron metal b.strong magnetic field c.repulsion d.north and south poles
Answers: 2
Physics, 23.06.2019 11:00
What is reflection, what is refraction, and what is diffraction. what some similarities or differences between the three.
Answers: 2
For her first trial, the student decided to mix 250 ml of water at 20°c with 250 ml of water at 98°c...
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