Which of the following best describes Newton's Second Law of Motion? (more than one answer applies)
2 answers:
Answer:
F=m • a
A swimmer turns and kicks off from the end of the pool.
A book will slide across the desk if you exert a force on it.
Explanation:
The first one, F = ma is a direct expression of the Newton's second law of motion. This is because the force exerted on an object changes its momentum like this:
where (acceleration is change in velocity with respect to time)
Thus, the equation will be in the form:
F = ma
The second scenario points to an acceleration produced as a result of the force on an object. This time the feet propel the motion hence,
The third scenario is the fact that the force produces acceleration on the book.
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Answer: Option (b) is the correct answer.
Explanation:
A covalent compound is defined as the compound in which sharing of electrons take place between the combining atoms. Generally, when two or more non-metals chemically combine together the it will lead to the formation of a covalent compound.
For example, and HCl is also a covalent compound.
And, a compound in which transfer of electrons occur between the combining atoms is known as an ionic compound. Whenever, a metal chemically combines with a non-metal then it will always lead to the formation of an ionic compound.
For example, KI is an ionic compound.
Thus, we can conclude that and HCl are the two substances which are covalent compounds.