Afixed, single pulley that is used to lift a block does which one of the following?
a.
...
Afixed, single pulley that is used to lift a block does which one of the following?
a.
doubles the force required to lift the block
b.
decreases the force required to lift the block
c.
makes the block easier to lift by changing the direction of the force needed to lift it
d.
decreases the force required and changes the direction of the force required
Answers: 2
Chemistry, 21.06.2019 14:00
Which of the following statements is true? question 4 options: nuclear decay rates vary with the conditions of the reaction, but chemical reaction rates do not. chemical reaction rates vary with the conditions of the reaction, but nuclear decay rates do not. neither chemical reaction rates nor nuclear decay rates vary with the conditions of the reaction. both chemical reaction rates and nuclear decay rates vary with the conditions of the reaction.
Answers: 1
Chemistry, 21.06.2019 23:10
Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.
Answers: 1
Chemistry, 22.06.2019 21:00
Which answer tells the reason the earthβs climate is getting warmer? too many animals are becoming extinct. large glaciers are melting in antarctica. the earth is moving closer to the sun. driving cars gives off gases that trap heat in the atmosphere.
Answers: 1
Chemistry, 23.06.2019 02:00
Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.
Answers: 2
Mathematics, 05.07.2019 18:00
Mathematics, 05.07.2019 18:00
Chemistry, 05.07.2019 18:00
Biology, 05.07.2019 18:00
Arts, 05.07.2019 18:00
Mathematics, 05.07.2019 18:00
Mathematics, 05.07.2019 18:00
Mathematics, 05.07.2019 18:00
Social Studies, 05.07.2019 18:00