What is the tangential velocity of a record player which makes 11 revolutions in 20 seconds? Please help

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

The three classes of rocks are sedimentary, metamorphic, and igneous. how are rocks classified into one of these three groups?

Ionic compounds can be readily dissolved in water because the high dielectric constant of water screens and decreases the force between the oppositely charged ions.