What can be found by counting the number of troughs per second in a wave diagram

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?

State the following: boyle's law and charle's law

Acar traveling at a constant speed of 22.0 m/s passes a trooper hidden behind a billboard. one second after the speeding car passes the billboard, the trooper sets off in chase with a constant acceleration of 3.50 m/s2. how long does it take the trooper to overtake the speeding car? solve this problem by a graphical method. on the same graph, plot position versus time for the car and the trooper.