At the Billings Auto and Highway Safety Testing Lab, a car with a crash-test dummy inside travels at 38.89 m/s (87 mi/h) toward a stationary car during a crash test. The
moving car takes 0.65 s from the point of car impact to the time when the car comes to a
complete stop. Calculate the deceleration of the car.

The field lines around one end of a bar magnet are shown below based on the diagram, what can you conclude about the pole of the magnet? a.is a south pole because the field hnes spread out from this end b.a north pole because the field lines spread out from this end c.a nouth pole because the field lines enter the magnet at this end d.is a north pole because the field lines enter the magnet at this end

How is an electron dot structure used to represent a covalent bond?

The radioactive isotope of lead, pb-209, decays at a rate proportional to the amount present at time t and has a half-life of 3.3 hours. if 1 gram of this isotope is present initially, how long will it take for 80% of the lead to decay? (round your answer to two decimal places.)