How do vibration produce sound?

What is the name of the North Star?

Julia rides her horse 12 miles in 45 minutes. What is her average speed in mi/min?

How does the sun's energy most directly influence precipitation in an area?

A car racing down the street starts at 5 m/s and increases speed at a rate of 2 meters per second squared. The distance the car travels is 7.5 m. What is the final velocity of the car?

A conveyor belt at a quarry lifts 1,800 kg of sand per minute up a vertical distance of 9.5 meters. The sand is initially at rest, then moves at a speed of 0.28 m/s along the conveyor belt.

An object's weight is equal to its buoyant force in water. What would you expect to happen when the object is placed in water? Explain your reasoning.

What is the name of the german scientist that proposed the theory of continental drift

Trucks 1 and 2 are traveling at the same constant velocity but truck 1's energy due to motion is two times less than that of truck 2. This is because Truck 1's mass is:

Why do the densities of most substances decrease with an increase in temperature?

Consider two planets in space that gravitationally attract each other if the mass of one of them stays the same and the mass of the other is doubled AND the distance between them is doubled, then the force between them changes by what factor? A.