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sesenic [268]
4 years ago
5

Plz help! Which of the following statements is tru about the villi.

Physics
1 answer:
ANTONII [103]4 years ago
7 0
It is the primary site for nutrient absorption into the blood stream after being digested into small molecules with enzymes.
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What minimum heat is needed to bring 250 g of water at 20 ∘C to the boiling point and completely boil it away? The specific heat
Amiraneli [1.4K]

Answer:633.8 KJ

Explanation:

Given

mass of water\left ( m\right )=250gm

Initial temperature\left ( T_i\right )=20^{\circ}C

Final temperature \left ( T_f\right )=100^{\circ}C

Specific heat of water \left ( c \right )=4190 J/kg-k

heat of vaporization\left ( L\right )=22.6\times 10^5 J/kg

Heat required for process\left ( Q\right )=heat to raise water temperature from 20 to 100 +Heat to vapourize water completely

Q=mc\left ( T_f-T_i\right )+mL

Q=0.25\times 4190\times \left ( 100-20\right )+0.25\times 22\times 10^5

Q=\left ( 0.838+5.5\right )\times 10^5

Q=6.338\times 10^5J=633.8 KJ

4 0
4 years ago
Are porkaryotic cells bigger or smaller than eukaryotic cells
Anna11 [10]
The prokaryotic cells are indeed smaller than the eularyotic cells.
Eukaruotic cell size -10-100um
Prokaryotic cell size - 1-10 um
8 0
4 years ago
What is a phenomenon in your own words?
Nadusha1986 [10]

Answer: 1 : an observable fact or event. 2a : an object or aspect known through the senses rather than by thought or intuition. b : a fact or event of scientific interest susceptible of scientific description and explanation. More from Merriam-Webster on phenomenon.

3 0
3 years ago
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What mechanism of energy is transferred by mass motion of fluid from one region of space to another?​
lora16 [44]
Convection, because it is the process of heat transfer from one location to the next by the movement of fluids. The moving fluid carries energy within it.
5 0
3 years ago
The effective nuclear charge for an atom is less than the actual nuclear charge due to
Dmitrij [34]

Answer:

Repulsion

Explanation, due to this repulsion with the proton and the electron, each electron experiences a nuclear charge that is somewhat less than the actual nuclear charge.

3 0
4 years ago
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