A car takes 4 hours to cover a distance, if it travels a speed of 40 mph. What should be it's speed to cover the same distance in 1.5 hours?

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %