When rust forms on a piece of iron, what evidence do you have that a chemical reaction has taken place?

N 80-kg man is one fourth of the way up a 10-m ladder that is resting against a smooth, frictionless wall.

At a construction site, the site manager notices that a crane takes 20 seconds to lift a 500kg steel beam up to a height of 15 meters. From this information, he calculates the power output of the crane to be what value?

If a student is walking against the wind, would the student be traveling faster or slower than a person walking with the wind and why?

The greater the difference in electronegativity between two covalently bonded atoms

What comes from batteries? a watts b amperes c volts d ohms

run at the same speed and in the same direction, and they both run for the same amount of time, what can you say about the distance they travel?

How can you show positive body languages with your mouth

After making minor changes to a team report, Jeff felit like he had done enough work on the project. When he was asked to contribute more, he got offlended and quit responding to requests from some leam members.

How many basic wave forms are there? A.) 1 B.) 2 C.) 3 D.) 4

Calculate the acceleration of a 90-kg skydiver with a net force of - 883 N