What safety factors should astronauts be aware of when collecting rock samples on the Moon?

Two thin 80.0- cm rods are oriented at right angles to each other. each rod has one end at the origin of the coordinates, and one of them extends along the x- axis while the other extends along the yaxis. the rod along the x- axis carries a charge of - 15.0 μ c distributed uniformly along its length, and the other rod carries 15.0 μ c uniformly over its length. find the magnitude and direction of the net electrical force that these two rods exert on an electron located at the point (40.0 cm, 40.0 cm). (e

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest

Who was the first scientist to measure speed as distance over time?