Answer:
b. He has to apply less force to lift the box because the mass has decreased.
Explanation: i just took a ck12 test and it was right lol
The characteristic of science that is best exemplified by the paragraph presented is "It is falsifiable and reproducible."
<h3>What is science?</h3>
Science can be mostly defined as a set of methods and principles that aim at objectively understanding and explaining the phenomena that occurs in the world.
These set of methods and principle lead to theories and laws that describe how a specific phenomenon occurs.
<h3>What does "It is falsifiable and reproducible"?</h3>
This is a basic principle that implies hypotheses about a specific phenomenon can be tested using experiments and this can lead to either the confirmation of the hypothesis or dispproved. Moreover, same experiments can be used and these will have similar results.
This principle matches the paragraph because the same experiment leads to same results. Moreover, previous ideas about a phenomenon were disproved.
Learn more about science in: brainly.com/question/12842883
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The Third law is mixed with motion and force so if you drop a bouncy ball from 10ft it will hit the ground and loose half of its motion and come back up but only reach 5ft then when it bounces again only 2.5ft then so on so forth until it has no kinetic energy left.
Answer:
Kinetic energy of the body
So, K.E∝ v²
If speed of the body is halved, its kinetic energy is reduced by a factor of 4.
Answer:
The canyon is 884 meter deep at this location
Explanation:
<u>Step 1:</u> Data given
He hears his echo back from the Canyon floor 5.20 seconds later. (t= 5.20s)
Speed of sound in air is 340.0 m/s
<u>Step 2:</u> Calculate time echo reaches the bottom
Time the echo reaches bottom + time echo reaches top = 5.20 seconds
So the time the echo needs to reach the bottom = (5.20/2) seconds
<u>Step 3: </u>Calculate the distance
Distance = velocity * time
X = 340.0 m/s * (5.20/2) seconds
X = 884 meters
The canyon is 884 meter deep at this location