Does friction depends on the nature of two syrfaces which are in contact with each other

What is the forumla for chlorine? anion

Which of the following has the highest atomic size? A beryllium B strontium C barium D radium

How does alternating current prevent power loss over each cycle with the current moving back and forth?

How is a ground wire a safety precaution

In 2007, Michael Carter (U. S.) set a world record in the shot put with a throw of 24.77 m. What was the initial speed of the shot if he released it at a height of 2.10 m and threw it at an angle of 38.0o above the horizontal

In an experiment, 108 J of work was done on a closed system. During this phase of the experiment, 79 J of heat energy was added to the system. What was the total change in the internal energy of the system?

J. J. Thomsons experiments provided evidence that an atom

How does our sun differ from most other main sequence stars?

A large body of air hats has similar properties of a temperature and moisture is a

An ice rink is 200 feet long and 85 feet wide. The four corners of the rink are rounded to a radius of 24 feet. What is the surface area of the rink? Round the answer to the nearest square foot.