which research method would be used in determining whether caffine suppliments improved brain performance?

Describe different biomes. what are some adaptations that organisms (plants or animals) must have to live in each biome?

How much energy is supplied to each coulomb of charge that flows through a 12-v battery?

An electron moving at 5.06 103 m/s in a 1.23 t magnetic field experiences a magnetic force of 1.40 10-16 n. what angle does the velocity of the electron make with the magnetic field? there are two answers between 0° and 180°. (enter your answers from smallest to largest.)