A pulley block and tackle is used to lift a piano. The piano weighs 2000N. If the worker used 100 N of force to lift the piano, what is the mechanical advantage of the block and tackle?

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A swimmer, capable of swimming at a speed of 1.0 m/s in still water (i. e., the swimmer can swim with a speed of 1.0 m/s relative to the water), starts to swim directly across a 3.0-km-wide river. However, the current is 0.

A 6.5-l sample of nitrogen at 25°c and 1.5 atm is allowed to expand to 13.0 l. the temperature remains constant. what is the final pressure?

Which cycle causes earthquake and volcanic activity?

Adding more aluminum to a sheet of aluminum changes its mass and?

What are some stressors of aquatic organisms

A group of lions is chasing a zebra. The lions are most likely responding to which kind of stimulus

A ray diagram is shown What does e, represent? index of refraction index of reflection angle of incidence angle of refraction Mark this and retum Submit Save and Exit

Which renewable resource could become a nonrenewable resource if used faster than Earth's ability to replenish its supply? A. water B. manganese C. sunlight D. wind

Which rule for assigning oxidation numbers is correct Hydrogen is usually - 1. Oxygen is usually - 2. Apure group 1 element is + 1. Amonatomic ion is 0.

What word means to move from one place to another