Chemistry, 22.11.2019 12:31 jetblackcap
The effort needed when a simple machine is used is best described by which of these statements?
a) the effort force is always smaller than the force needed without the machine.
b) the effort force is always greater than the force needed without the machine.
c) the effort force is most often smaller than the force needed without the machine.
d) the effort force is most often greater than the force needed without the machine.
Answers: 2
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Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture
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Answers: 2
The effort needed when a simple machine is used is best described by which of these statements?
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