What are two reasons why density is a useful physical property for identifying substances?

True or false: the revolution of the earth creates day and night as it rotates around the sun

Which car has the most kinetic energy? a. a car of mass 1000 kg with a speed of 3 m/s b. a car of mass 2000 kg with speed 7 m/s c. a car of mass 1000 kg with speed 7 m/s d. a car of mass 2000 kg with speed 3 m/s

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c