The distance from the center of the lens to its principal focus is called the focal length. O A. True
O B. False​

At time t=0, a particle is located at the point (3,6,9). it travels in a straight line to the point (5,2,7), has speed 8 at (3,6,9) and constant acceleration 2i−4j−2k. find an equation for the position vector of the particle.

Which of the following are considered noble gases? a. bromine b. neon c. argon d. chlorine

Four identical lab carts each have a mass of 200 kg. different masses are added to the carts and the velocities are measured. all carts move to the right.