How do you spell hard water in three letters.

Fire is an important maintenance process in which biome?

A worker pulls horizontally on a crate across a rough horizontal surface, causing it to move forward with constant velocity. Force A is the force exerted by the worker and force B is the force of friction due to the surface.

The sketch shows a painter's scaffold in mechanical equilibrium. The person in the middle weighs 225 N, and the tension in each rope is 300 N. What is the weight of the scaffold?

What hits the atmosphere faster than 90,000 miles per hour a.) comets b.) meteors c.) meteoroids

A sports car and a minivan run out of gas and are pushed to the side of the road. which is easier to push, and why?

Marie and Calvin dissolved 10 grams of KNO3 in 100 grams of water at 25oC. Next they added 5 grams more.

On a frictionless air track, a blue glider with mass 0.200 kg is moving to the right with a speed of 8.00 m/s. It strikes a red glider that has mass 0.600 kg and that is initially at rest.

f a wave has a wavelength of 9 meters and a period of 0.006, what is the velocity of the wave? A. 1,200 m/s B. 1,500 m/s C. 1,800 m/s D. 1,285 m/s

Using your own words, what is Net Force? What general statement can you make about the relationship between net force and how fast an object changes it's speed?

Define valence electrons and identify the number of valence electrons in an element using periodic table.