An ion accelerates from rest through a potential difference of 120. V and gains kinetic energy of 240 eV. What is the electric charge of the ion?

What is the role of the ocular lens?

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

In a stagnant pool of water, a crayfish may spend much of its time lying with one side of its carapace near the surface of the water. in this position, it will move the walking legs on that side in a rhythmic back-and-forth motion. explain the likely function of this behavior.