Tyler is running down the street after his brother at a speed of 1.2 m/s and contains 10.8 J of kinetic energy. Calculate Tyler’s mass

Compare and contrast physical changes with chemical changes.

When a septic tank backs up a goes in to clean it out

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull