You are designing a Roller coaster on which the cart will go up to the First slope, then it will plummet and arrive at the top of the next slope. The second one has twice the height of the first. Will your design work? Explain your answer.

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?