As the cars of a rollercoaster race down a hill, energy transformations take place. Which of the following is true?

a Kinetic energy is stored in the cars as they move downhill and is released when they move uphill.
b Some of the potential energy is transformed to kinetic energy and other forms of energy.
c Some of the energy is destroyed as the car slows down and comes to a stop.
d The total energy doesn't change; the kinetic energy of the cars is equal to the potential energy of the cars.

Zeros that follow non-zeros numbers and are also to the right of a decimal point are significant

A3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular? a 3030 cmcm wrench is used to loosen a bolt with a force applied 0.30.3 mm from the bolt. it takes 6060 nn to loosen the bolt when the force is applied perpendicular to the wrench. how much force would it take if the force was applied at a 3030 degree angle from perpendicular?

Which is not true of the intertropical convergence zone? a) it features heavy precipitation b) it's where the trade winds collidec) it's a high-pressure zone with sinking air d) it is also known as the doldrums