What is the best definition of the property of texture? how easily a substance is cut or scratched
how much matter is in an object
how a surface or substance feels
how warm or cold a substance is

Aproton is projected toward a fixed nucleus of charge +ze with velocity vo. initially the two particles are very far apart. when the proton is a distance r from the nucleus its velocity has decreased to 1/2vo. how far from the nucleus will the proton be when its velocity has dropped to 1/4vo?

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

Directions: count the number of atoms. ar co2 na3po4 so3 nac2h3o2