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goldfiish [28.3K]
2 years ago
12

Will mark brainliest. What is the main function of the circulatory system in multicellular organisms?

Chemistry
1 answer:
just olya [345]2 years ago
4 0

Answer:

D: to transport materials through the body.

Explanation:

A: to bring oxygen into the lung. is incorrect because it's respiratory system

B: to put carbon dioxide into all the blood vessels carbon dioxide is exhaled out of the body

C: to expel waste products from the body. is excretory system

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When matter is a gass, a lot of the time it is ____?
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2 years ago
DIRECTIONS: Use the Word Bank to answer the questions below. For questions 2 and 3 circle the correct choice.
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Explanation:

1. Electrons surround the nucleus in defined regions called orbits.

2. The shells further away from the nucleus are ​larger​ and can hold ​more electrons.

3. The shells closer to the nucleus are ​smaller​ and can hold ​less​ electrons.

4. The closest shell (closest to the nucleus) can hold a maximum of two electrons.

5. Once the first shell is full, the second shell begins to fill. It can hold a maximum of eight electrons.

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8 0
3 years ago
When 3.0 kg of water is warmed from 10 °C to 80 °C, how much heat energy is needed?
Naddik [55]

Answer:

THE HEAT NEEDED TO CHANGE 3KG OF WATER FROM 10 C TO 80 C IS 877.8kJ OR 877,800 J.

Explanation:

Mass = 3.0 kg = 3 * 1000 = 3000 g

Initial temperature = 10 C

Final temperature = 80 C

Change in temperature = 80 - 10 = 70 C

Specific heat of water = 4.18 J/g C

Heat needed = unknown

Heat is the amount of energy in joules needed to change a gram of water by 1 C.

Heat = mass * specific heat * change in temperature

Heat = 3000 g * 4.18 J/g C * 70 C

Heat = 877 800 Joules

Heat = 877.8 kJ.

The heat needed to change 3 kg mass of water from 10 C to 80 C is 877,800 J or 877.8 kJ.

6 0
3 years ago
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