A roller coaster loop has a radius of 12 m. To prevent the passengers in a car from not falling out at the top of the loop, what is the minimum speed the car must have at the top?

How is sound energy produced a. vibrating objects b. objects being heated c. temperature differences d. stationary objects

This is important. 1. which of the following is an si base unit for measuring length? (2 points) inch gram meter mole 2. which of the following units for distance is an si unit? (2 points) centimeter foot inch yard 3. which of the following tools should a scientist use to measure an object in meters? (2 points) electronic balance pan balance tape measure thermometer

Sodium chloride, nacl, is formed when a sodium atom transfers its electron to a chlorine atom. the difference in charge between the two atoms creates a(n) attraction that bonds them together.