Physics, 20.06.2019 18:02, soulspiritsa

# Apulley system lifts a 500-ib block 1.0 foot with an effort of only 50 ib. if the 50 ib moves 30 feet, calculate the efficiency of the pulley system. a. 30% b. 33% c. 70% d. 67%

Answers: 1

Physics, 21.06.2019 18:00, justhereforanswers13

According to the law of conservation of mass, in a chemical reaction the total starting mass of all the reactants equal the total final mass of all the products. true or false?

Answers: 1

Physics, 21.06.2019 18:20, charlie3051

Find the vertex(use the completing the square method), findthe x- and y-intercepts, and sketch the graph offunction. y = 2x2 + 4x - 1

Answers: 3

Physics, 22.06.2019 09:00, reyesortiz6955

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

Answers: 1

Physics, 22.06.2019 09:30, Leonardo8366

Devonte pushes a wheelbarrow with 830 w of power. how much work is required to get the wheelbarrow across the yard in 11 s? round your answer to two significant figures. it takes j of work to get the wheelbarrow across the yard.

Answers: 1

Apulley system lifts a 500-ib block 1.0 foot with an effort of only 50 ib. if the 50 ib moves 30 fee...

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