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Semmy [17]
2 years ago
6

Which of the following is a statement of the first law of thermodynamics?

Biology
2 answers:
galben [10]2 years ago
5 0

Answer:

Which of the following is a statement of the first law of thermodynamics? Energy can be transferred/transformed, but it cannot be created or destroyed. ... Whenever energy is transformed, there is always an increase in the: entropy of the universe.

Explanation:

olasank [31]2 years ago
4 0

Answer:

✔ Heat is transformed, but not created or destroyed.

Explanation:

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Need help asap ! please and thank you !
LiRa [457]
I think calcium but i could be wrong
3 0
3 years ago
A researcher performs an experiment to test a hypothesis that involves the nutrients niacin and retinol. She feeds one group of
julsineya [31]

Answer:

- 100 grams of food A (x)

- 60 grams of food B (y)

Explanation:

According to this question, the group of laboratory rats are being fed a daily diet of:

- 125.6 units of niacin and 5,400 units of retinol

Let x represent the number of grams needed for food A.

Let y represent the number of grams needed for food B.

This means that:

Food A: Niacin = 0.86x, Retinol = 30x

Food B: Niacin = 0.66y, Retinol = 40y

Since there are 125.6 units of niacin fed to the rats in total, then;

0.86x (A) + 0.66y (B) = 125.6

Since there are 5400 units of retinol fed to the rats in total, then;

30x (A) + 40y (B) = 5400

Solving these two equations simultaneously using elimination method:

0.86x (A) + 0.66y (B) = 125.6 ........(eqn 1)

30x (A) + 40y (B) = 5400 ............ (eqn 2)

Multiply eqn 1 by 30 and eqn 2 by 0.86

30 × 0.86x + 0.66y = 125.6

0.86 × 30x + 40y = 5400

25.8x + 19.8y = 3768 ............ (eqn 3)

25.8x + 34.4y = 4644 ........... (eqn 4)

Subtract eqn 3 from eqn 4

14.6y = 876

Divide both sides by 14.6

y = 876/14.6

y = 60

Substitute value for y (60) into eqn 2

30x + 40y = 5400

30x + 40(60) = 5400

30x + 2400 = 5400

30x = 5400 - 2400

30x = 3000

x = 3000/30

x = 100

Therefore, she feeds the group of rats 100grams of food A (x) and 60 grams of food B (y).

4 0
3 years ago
Which of the following events takes place during a single rotation of Earth?
NNADVOKAT [17]

Answer:

A

Explanation:

Answer is option one, or A

5 0
2 years ago
How many parts does the plant cell has
Lilit [14]
I’m thinking 8..
Hope this helps, if you haven’t gotten on google yet haha
4 0
3 years ago
Choose one of the 3 systems
Alex777 [14]

Answer:

<h3>for digestive system ( similarities)</h3>

Explanation:

1. All three digestive systems take up majority space inside their bodies

2. All three of the animals food prey begin through the mouth and end through the anus

3 0
2 years ago
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