Cold Atoms: When atoms are cooled to very low temperatures, they move very slowly. At these low speeds, atoms can fall under their own weight. A team of scientists is studying cold ions. Each ion has a mass of 1.91 x 10 25 kg, a charge of 1.6 x 10-19 C, and an average velocity of 15.0 mm/s due north. The scientists are trying to focus a beam of these atoms on a detector 1.000 m away. However, gravity is deflecting the beam. One scientist suggests using a magnetic field to counteract the force of gravity. (a) What minimum magnetic field strength could counteract the force of gravity for these particles? (b) What direction should the field be oriented? Either describe the direction or draw a picture that shows the velocity of the particles, the direction of gravity, and the direction of the magnetic field. Ignore the earth's magnetic field. It has eliminated by magnetic shielding around the experimental setup.

Cold Atoms: When atoms are cooled to very low temperatures, they move very slowly. At these low speeds, atoms can fall under their own weight. A team of scientists is studying cold ions. Each ion has a mass of 1.91 x 10 25 kg, a charge of 1.6 x 10-19 C, and an average velocity of 15.0 mm/s due north. The scientists are trying to focus a beam of these atoms on a detector 1.000 m away. However, gravity is deflecting the beam. One scientist suggests using a magnetic field to counteract the force of gravity. (a) What minimum magnetic field strength could counteract the force of gravity for these particles? (b) What direction should the field be oriented? Either describe the direction or draw a picture that shows the velocity of the particles, the direction of gravity, and the direction of the magnetic field. Ignore the earth's magnetic field. It has eliminated by magnetic shielding around the experimental setup.