In a car, you drive from your home 4 km to the gas station, 8 km to the shopping mall to let your mother off, and 8.9 km back home. The trip takes 20 min.
What is your velocity?

What sort of waves exhibit the doppler effect?

Specific heat refers to the amount of heat required to change 1 gram of a substance by degree(s) celsius

What do the atoms of elements in the same group have in common? a. they have the same atomic numbers. b. they have the same average atomic masses. c. they have the same number of electron shells. d. they have the same number of electrons in their outermost shells.