Ameteorologist has very specialized expertise in which of the following activities?

What phase of matter has particles that are held together but can flow past each other and takes the shape of a container, filling it from the bottom up?

The modern periodic table has groups.

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?