if you have to apply 40 N of force on a crowbar to lift a rock that weighs 400 N, what is the actual mechanical advantage of the crowbar?

A market economy is regulated by the interactions between which two things? A. Goods and services B. Producers and consumers C. Product-based and service-based businesses D. Public and private sectors

Choose the answer that most correctly explains why changing the temperature causes a shift in equilibrium? Changing temperature cannot affect the equilibrium of a reaction.

1) Two cars both moving at 27m/s (60mile/hr) pass each other on a road, one moving east the othe other west. 1a) both cars have the same speed (T, F) 1b) both cars have the same velocity (T, F)

If you double the wavelength of a wave on a string, what happens to the wave speed and the wave frequency? Group of answer choices a) v is unchanged and f is halved. b) v is doubled and f is doubled. c) v is doubled and f is unchanged.

How does a roller coaster convert potential energy to kinetic energy and then back to potential energy again and again?

A car traveling at a speed of v can brake to an emergency stop in a distance x. assuming all other driving conditions are all similar, if the traveling speed of the car doubles, the stopping distance will be

Why would an orange roll off your cafeteria tray if you stopped suddenly

Each shell is limited to a maximum of four electrons. True or False?

What is a hypothesis answer sentence for a lemon battery experiment

An object that is initially at rest on a frictionless floor is struck by a flying rock with an impulse jfonox. what is the final momentum of the object?