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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Which of the following would cause a galvanometer needle to move

While camping you see the reflection of the moon on the lake. it looks like a bright flat sphere on the water. what phase of the lunar cycle is the moon likely in? a. old moon b. new moon c. full moon d. waxig gibbous

How does water change the shape of earth's surface?

The rear window of a van is coated with a layer of ice at 0°c. the density of ice is 917 kg/m3, and the latent heat of fusion of water is 3.35 x 105 j/kg. the driver of the van turns on the rear-window defroster, which operates at 12 v and 23 a.

Would a person with fewer villi be overweight of underweight?

Relaying a message from a membrane receptor to a molecule that performs a specific function within a cell occurs when

Ultrasound consists of sound at frequencies most people can hear?

Ali has less mass flying in a jet high above the earth than when she stands on the surface of the earth. True False

A passenger jet flies from one airport to another 1,333 miles away in 2.2 h. Find its average speed in the mks system of units.

A string is wound tightly around a fixed pulley whose radius is 5.0 cm. As the string is pulled, the pulley rotates without slipping. What is the angular speed of the pulley when the string has a linear speed of 5.0 m/s?