What makes people more vulnerable to addition

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?

Which other elements contain the same number of outer electrons as sodium

This drawing shows a human body system. what is the primary function of this body system?