1. What is the wave speed of a wave that has a frequency of 50 Hz and a wavelength of 0.20 m?

2. What is the frequency of a wave that has a wave speed of 100 m/s and a wavelength of 0.20 m?

3. What is the wavelength of a sound wave that has a speed of 340 m/s and a frequency of 420 Hz? (Round your answer to the nearest hundredth)

4. What is the wavelength of a sound wave that has a speed of 270 m/s and a frequency of 400 Hz?

5. What is the wave speed of a wave that has a frequency of 100 Hz and a wavelength of 0.25 m?

What is tan(61)? а. 1.80 b. 0.49 c. 0.61 d. 0.87

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.

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?