In an experiment a student places two carts on a level horizontal track with photo gates X and Y that help the student determine the speeds of the carts as shown above the carts move toward each other

How is acceleration calculated? a. initial velocity - final velocity / timeb. initial velocity + final velocity / timec. final velocity - initial velocity / timed. final velocity / timele select the best answer from the choices provided0oood00save and exitnextmark this and return

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

What are atoms of the same element with varying number of neutrons