How does the ionosphere help radio transmission? allows radio waves to travel through the atmosphere permits radio waves to travel around the Earth's circumference magnifies (strengthens) radio ground waves

Amodel rocket with a mass of 0.212 kg is launched into the air with an initial speed of 84 m/s. how much kinetic energy will the rocket have at a height of 214 m? assume there is no wind resistance. 634 j 303 j

Ihave a density of 1.61g/cm^3 and a mass of 28g. find the missing value

What can you increase the strength of an electromagnet by