A. The speed of the car and riders (total mass = 350.0 kg) at the top of the first hill, Point A, is 4.00 m/s.
What is the speed at Point B, 5.00 m below Point A.
b. The top of the second hill, Point C, is 8.00 m above Point B. Is the roller coaster moving fast enough to
make it to the top of the second hill?
Calculate the minimum speed required at Point B in order for the rollercoaster to reach the top of the
second hill, Point C.
c.
d.
Did you need to know the mass of the car and
riders in order to answer this question? Explain.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Write down two additional questions about earth's magnetic field that will make your presentation more informative.

At what time will the interfering waves have an amplitudeof zero?