A projectile is shot from the edge of a cliff 160 m above ground with an initial speed of 55.0 m/s at an angle of 40° below the horizontal. How much time does it take the projectile to hit the ground?

True or false: Equilibrium is the continual change from product to reactant and back.

An object with a mass of 20 kg has a net force of 80 N acting on it. What is the acceleration of the object? 0.25 m/s2 4 m/s2 60 m/s2 100 m/s2

What is a superconductor?

On a brisk walk, a person burns about 331 Cal/h. If the brisk walk were done at 3.0 mi/h, how far would a person have to walk to burn off 1 lb of body fat? (A pound of body fat stores an amount of chemical energy equivalent to 3,500 Cal.) mi?

Controlling the amount of current in a circuit by opposing the flow of charge is a function of which circuit component?

A spring tide can occur at what day and month?

For a given launch velocity, at which launch angle does the projectile undergo the maximum horizontal displacement

Electric force is blank proportional to the amount of charge and blank proportional to the square of the distance between the charges

What happens in the gray zone between solid and liquid?

Which statement describes Newton's law of universal gravitation? Mass has hittle effect on gravity between objects. Gravity pushes objects away from Earth's center, Gravity does not act between Earth and the moon.