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mart [117]
2 years ago
11

PLS HELP FAST How does the circulatory system work at the tissue level? Cardiac muscle contracts. The heart pumps the blood. Nut

rients are delivered throughout the body. Blood cells carry nutrients.
Chemistry
2 answers:
Trava [24]2 years ago
8 0

Answer: it was B: the heart pumps the blood

Explanation:

i took the test and got an A

borishaifa [10]2 years ago
5 0

Answer:

b

Explanation:

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What do elements in the first two columns of the periodic table have in common?
coldgirl [10]

Answer: b.) they tend to lose electrons to gain stability

Explanation:

5 0
2 years ago
A system gains 652 kJ of heat, resulting in a change in internal energy of the system equal to +241 kJ. How much work is done?
levacccp [35]

Answer:

-411 kj

Explanation:

We solve by using this formula

∆U = ∆Q + ∆W

This formula is the first law of thermodynamics

Change in internal energy U = +241

Heat gained by system Q = 652

Putting the value into the equation

+241 = 652 + W

Workdone = 241 - 652

Workdone = -411 kj

Since work done is negative it means that work was done by the system

3 0
2 years ago
PLEASE HELP
DENIUS [597]

I believe that it is B

3 0
3 years ago
Porque una mezcla tiene composición variable?
LuckyWell [14K]
¿ cuál es la pregunta que intentas hacer?
7 0
3 years ago
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lana [24]

Answer:

Balanced equation have equal number of atoms of different elements in the side of reactants and products.

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3 years ago
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