Olympic gold medalist Michael Johnson runs one time around the track 400 meters in 38 seconds. What is his displacement? What average velocity? Show you work Show work for me please someone help me

Lymphocytes known as blastocysts make antibodies that fight infection. select the best answer from the choices provided t f

How does the kinetic energy of a charge change as the charge moves under the effect of an electric field from higher potential to lower potential? a.the kinetic energy increases.b.the kinetic energy decreases.c.the kinetic energy remains the same.d.the kinetic energy is always zero.

Electromagnetic induction. a coil of wire contains n turns and has an electrical resistance r. the radius of each turn is a. initially, inside the coil there exists a uniform magnetic field of magnitude b0 parallel to the axis of the coil. the magnetic field is then reduced slowly. the current induced in the coil is i. how long does it take for the magnitude of the uniform field to drop to zero?