You whirl a ball tied to a light string of negligible mass in a vertical circle in the clockwise direction. the mass of the ball is 0.200 kg and the length of the string is 0.660 m. you maintain the center of the circle to be at a constant height of 2.80 m from the floor. if the string breaks when the ball is at the lowest point and its speed is 2.50 m/s, where on the floor does it land? express your answer in vector form with the center of the circle as the origin.

Certain bacteria (such as aquaspirillum magnetotacticum) tend to swim toward the earth’s geographic north pole because they contain tiny particles, called magnetosomes, that are sensitive to a magnetic field. if a transmission line carrying 100 a is laid underwater, at what range of distances would the magnetic field from this line be great enough to interfere with the migration of these bacteria? (assume that a field less than 5% of the earth’s field would have little effect on the bacteria. take the earth’s field to be 5.0 * 10-5 t, and ignore the effects of the seawater.)

Due in 40 explain in terms of frame of reference if you’re inside a moving train everything on the outside can seem to be moving

What is the relationship between ozone and smog?