The answer is tighten and contract.
In order for the students to pull the rope their muscles will need to tighten and contract so they are able to continuously pull with all their strength and power. Relaxed or twitched muscles will result in release of the rope.
Answer: According to the World Health Organization (WHO), 462 million people face health problems because of under-nutrition and another 1.9 billion people face health problems because of over-nutrition.
Explanation: 462 million adults are underweight around the world according to the World Health Organization (WHO) while 1.9 billion are overweight or obese. Undernutrition, includes 4 sub-forms: wasting, stunting, underweight, and deficiencies in vitamins and minerals. Wasting is low weight-for-height, stunting is low height-for-age and underweight is low weight-for-age. Overweight or obesity is when a person is too heavy for his or her height.
According to the question, the actual percentage concentration of phenylephrine hydrochloride is 1.
<h3>What is Percentage concentration?</h3>
Percentage concentration may be defined as a type of measurement of the amount of solute dissolved in every 100 units of solution.
According to the question, the amount of phenylephrine hydrochloride = 50 mg.
The volume of injection = 5 mL.
Percentage concentration =
= 5/5 = 1.
Therefore, according to the question, the actual percentage concentration of phenylephrine hydrochloride is 1.
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