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just olya [345]
2 years ago
5

Explain how the immune system responds to pathegons

Chemistry
1 answer:
Ne4ueva [31]2 years ago
4 0

Answer:

The immune system responds to antigens by producing cells that directly attack the pathogen, or by producing special proteins called antibodies. Antibodies attach to an antigen and attract cells that will engulf and destroy the pathogen. The main cells of the immune system are lymphocytes known as B cells and T cells.

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How do substances and mixtures diifer
vlabodo [156]

Answer:

hello hope this helps :)

a pure substance consists only of one element or one compound. a mixture consists of two or more different substances, not chemically joined together.

Explanation:

5 0
3 years ago
What is solar energy?
IrinaVladis [17]

Answer:

Solar energy is energy from the sun converting it to thermal or electric energy. It is renewable resource meaning it will never die out. It is also called radiant energy.

Explanation:

6 0
3 years ago
Why can stars be called element factories?
MAVERICK [17]

Answer:

They came from the element factories we call stars. Stars are mostly hydrogen throughout most of their lifespans. They are driven by massive and continuous thermonuclear reactions and gravity. ... This extra heat begins to fuse helium atoms into heavier elements like carbon and oxygen and gives new life to the star.

Explanation:

4 0
2 years ago
Read 2 more answers
After two half-lives, a sample contains 10 grams of parent isotopes. How many grams of the parent isotope were present to start?
Lunna [17]
T=2T
m=10 g

m=m₀2^(-t/T)

m₀=m/{2^(-2T/T)=m/2⁻²

m₀=10/2⁻²=40 g

40 grams
8 0
3 years ago
Read 2 more answers
A 16.0 16.0 L sample of neon gas has a pressure of 23.0 23.0 atm at a certain temperature. At the same temperature, what volume
Otrada [13]

Answer: 245 L

Explanation:-

To calculate the new volume, we use the equation given by Boyle's law. This law states that pressure is directly proportional to the volume of the gas at constant temperature.

The equation given by this law is:

P_1V_1=P_2V_2

where,

P_1\text{ and }V_1 are initial pressure and volume.

P_2\text{ and }V_2 are final pressure and volume.

We are given:

P_1=23.0atm\\V_1=16.0L\\P_2=1.50atm\\V_2=?

Putting values in above equation, we get:

23.0\times 16.0=1.50\times V_2\\\\V_2=245L

Thus new volume of gas is 245 L

3 0
3 years ago
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