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Distinguish between internal energy and temperature

Internal energy is the total EK and PE of the molecules/particles/atoms in and objectTemperature is a measure of the average KE of the molecules/particles/atoms
LL
Answered by Lina L. • Physics tutor
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3 girls and 4 boys are seated randomly on a bench. Find the probability that the girls set together and the boys sit together.

The number off total arrangements is 7!(permutation). The number of ways for which the girls and boys sit togehter is 3! 4! 2. The probability is the division of the number of way by the total possibilities,...
LL
Answered by Lina L. • Maths tutor
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Solve (sec (x))^2 + 2tan(x) = 0

Using the trigonometric identity: (sec(x))^2 = (tan(x))^2 + 1 we get to (tan(x))^2 + 2tan(x) + 1 = 0. We can express this result as the multiplication of 2 equal factors arriving at (tan(x) + 1)^2 = 0. This ...
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Answered by Lina L. • Maths tutor
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Describe the process of Eutrophication.

Excess nitrates and phosphates are water soluble and enter rivers/lakes/waterway due to leaching.Algae in the water use the increased level of ions for growth. This is called Algal bloom.Build up of algae on...
JU
Answered by Junaid U. • Biology tutor
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Describe how low blood water levels are controlled in the human body. (5 marks)

Changes in blood water levels are detected by the hypothalamus through the negative feedback mechanism in homeostasis (2 marks). The pituitary gland releases anti-diuretic hormone into the bloodstream as a r...
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Answered by Rehan J. • Biology tutor
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