If the central wavelength of a laser beam is at 600 nm and its corresponding mode number is 1.5x106, what is the cavity length of this laser

Describe the function of the endomembrane system? what organelles are involved?

This is for my 8th grade science class, i really don’t understand. can someone me? , lol.

When the displacement of a mass on a spring is 12a the half of the amplitude, what fraction of the mechanical energy is kinetic energy? at what displacement, as a fraction of a, is the mechanical energy half kinetic and half potential?