A mechanic uses a hydraulic lift to raise a car above her head. The car weighs 22,500N, and is raised by a piston with a 30cm diameter. What is the diameter of the smaller piston, if the force acting on it is 1500 N

Frequency of electromagnetic waves that a radio station is assigned. what do you call this type of wave?

Which statements identify what astronomers currently know and think will happen with our universe? check all that apply. the big bang produced dark energy, which accounts for some of the energy needed to expand the universe. the vastness of space may contain a type of matter known as "dark matter." the universe is currently shrinking at a rapid rate. the universe is currently expanding at an accelerating rate. the big bang theory explains all the energy and matter discovered by scientists.

Why, on the molecular level, does changing the amount of baking soda or vinegar affect the amount of carbon dioxide gas produced?