Answer:
A scientific theory is an explanation of an aspect of the natural world and universe that has been repeatedly tested and verified in accordance with the scientific method, using accepted protocols of observation, measurement, and evaluation of results. Where possible, theories are tested under controlled conditions in an experiment. In circumstances not amenable to experimental testing, theories are evaluated through principles of abductive reasoning. Established scientific theories have withstood rigorous scrutiny and embody scientific knowledge.
A scientific theory differs from a scientific fact or scientific law in that a theory explains "why" or "how": a fact is a simple, basic observation, whereas a law is a statement (often a mathematical equation) about a relationship between facts. For example, Newton’s Law of Gravity is a mathematical equation that can be used to predict the attraction between bodies, but it is not a theory to explain how gravity works. Stephen Jay Gould wrote that "...facts and theories are different things, not rungs in a hierarchy of increasing certainty. Facts are the world's data. Theories are structures of ideas that explain and interpret facts.
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Answer:
C. exactly vertical
Explanation:
"Plumb" means "exactly vertical."
Answer: true
Explanation:
A key is a machine element that us used to connect the element of a rotating machine to a shaft. It should be noted that the key hinders the relative rotation that may take place between the two parts.
Key length is designed to provide desired factor of safety. It should also be noted that the factor of safety shouldn't be much and the key length is typically limited to the hub length.
The statement that best explains the arrangement and position of the iron filings is A. the magnetic field around the magnet
<h2 /><h2>Magnetic field around a magnet</h2>
When we have a magnet, there is a magnetic field around the region of the magnet where the effect of the magnetic force of the magnet is felt. The magnet has both a North pole and a South pole.
<h3 /><h3>Magnetic field lines</h3>
- Magnetic field lines which show the direction of the magnetic field emanate from the North pole and terminate at the South pole of the magnet.
- When iron filings are brought into the region of a magnet to surround it, the iron filings align in the direction of the magnetic field around the magnet since they are magnetic.
So, the statement that best explains the arrangement and position of the iron filings is A. the magnetic field around the magnet
Learn more about magnets here:
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