A man’s speed is 50 m/s and his mass is 120 kg. What is his kinetic energy just before running back up? _ kg*m/s

What is the mass of 0.46 mil of mgcl2

What are the chemical names of these compounds? ke: mg3n2: reset next

Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.