dyllanmasters99
22.02.2022 •
Physics
The potential energy of a body 5m above the ground is 200j. Calculate the mass of the body if g=10m/s.
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Ответ:
the mass of the body is 4 kg
Explanation:
PE = mass • height • gravity
200J = mass • 5m • 10m/s/s
divide both sides by 50
4kg = mass
Ответ:
Radio waves are electromagnetic radiation, which occurs when you have an accelerating charge. The electric and magnetic fields (which can exist in empty space) keep oscillating and propagating themselves through space. They don't require a medium (other than spacetime and electromagnetic fields) because they aren't transmitted via massive particles.
Explanation: hope it helps