which change will most likely increase the strength of a magnetic field produced by an electromagnet?
question options:
reduce the number of turns of the coil
switch the direction in which the battery is connected
remove the iron nail
increase the voltage of a battery

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.

How is the ideal mechanical advantage of a wheel and axle calculated?

What do we mean by the event horizon of a black hole?