Please help me :( 1.) A laser emits light of frequency = 4.74 x 1014 sec-1. What is the wavelength of the light in nm?

2.) A certain electromagnetic wave has a wavelength of 625 nm.

a.) What is the frequency of the wave?

b.) What region of the electromagnetic spectrum is it found?

c.) What is the energy of the wave?

Read these sentences from the text. near the equator, the tropics receive the most rain on a consistent basis. as a result, the fresh water falling into the ocean decrease the salinity of the surface water in that region. [. .] . . as the salt content of sea water increases, so does its density. what can you infer about how rain affects the density of surface water near the equator?

Which element is the least metallic between cadmium, silver, zinc, or iron?

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as