What evidence contradicts the theory that moving two-ton stones was physically impossible for the Egyptians, and must have been done using alien technology?

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius