Linear momentum is conserved, so the speed of the block after
the bullet has passed through it and continued on its way is
(383 · mass of the bullet) divided by (mass of the block)
Answer:
30 neutrons
Explanation:
A neutral iron atom contains 26 protons and 30 neutrons plus 26 electrons in four different shells around the nucleus. As with other transition metals, a variable number of electrons from iron's two outermost shells are available to combine with other elements.
Answer:
A. Potential energy decreases and kinetic energy increases, but the total amount of mechanical energy remains the same.
Explanation:
Potential energy is the latent energy in an object at rest. Kinetic energy, is the energy expressed by an object in motion.
The ball is starting at rest and that is where the potential energy is at. In that case, the ball has no kinetic energy (no movement). When the ball begins to move that kinetic energy starts to increase and the potential energy decreases because it is no longer at rest.
The watts determine the brightness. Watt is the unit of Power. And Power is equal to Voltage x Amps (current). So both the current and voltage determine the brightness.
Only some metals are attracted by magnets; these metals are called ferromagnetic is your answer