a 58.72 person holding a steel ball stands motionless on a frozen Lake The Person then throws the Ball Which propells the person at 1.05m/s to the right and the ball 3.75m/s to the left If The initial momentum of the system is zero what is the mass of the steel Ball A. 3.57 B .3.73 C. 16.44 D. 15.66

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.)

The smallest particle of an element that retains its identity in a chemical reaction. true or false

How do the forces acting on a boat compare to the force acting on a plane ?