We know cells are living because they

can move independently
all eat food
have the seven properties of life
feel like they are alive

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

Immediately upon reaching its lowest point, a falling pendulum bob has its greatest amount of energy, which is the initial amount of potential energy. a. heat; less than b. heat; more than c. kinetic; less than d. kinetic; more than

How many neutrons does element x if it’s atomic number is 28 and its mass number is 87