Acar is traveling south at a speed of 54 miles per hour and then begins traveling at a speed of 55 miles per hour but continues traveling in the same direction. which of the following has changed? a. mass b. volume c. velocity d. density

speed change will not change mass, volume or density. so CORRECT ans is C. velocity

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.