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Svet_ta [14]
3 years ago
9

Ragav: is it a part of a living being? Sophie: yes it is Ragav: Is that living being an animal? Sophie: No, it's not. Ragav: doe

s that part grow in the direction of the light. Sophia: no, it doesn't what is Sophia talking about? A.Stems B lungs C legs D roots
Chemistry
1 answer:
erma4kov [3.2K]3 years ago
3 0

Answer: D. Roots

Explanation:

Sophie said that the part in question does not belong to an animal. This therefore invalidates options B and C as only animals would have lungs or legs.

Sophie then says that the part does not grow in the direction of light so that removes stems as the correct option because stems grow towards light in order to allow leaves to carry out photosynthesis.

Roots on the other hand grow towards gravity so they grow away from light which means that the correct answer is roots.

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PLEASE HELPP!!!!
Natasha_Volkova [10]

Answer:

<em>The combined law is:</em>

          \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}

See the derivation below.

Explanation:

<em><u>1. Boyle's law:</u></em>

    PV=constant\\\\P_1V_1=P_2V_2

<em />

<u><em>2. Charles' law:</em></u>

        \dfrac{V}{T}=constant\\\\\\\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}

<em><u>3. Gay-Lussac’s law</u></em>

      \dfrac{P}{T}=constant\\\\\\\dfrac{P_1}{T_1}=\dfrac{P_2}{T_2}

<u>4. Summary:</u>

  •    PV = K
  •    V/T = K'
  •    P/T = K''

Mulitply PV by V/T and P/T

        PV\times \dfrac{V}{T}\times \dfrac{P}{T}=K\times K'\times K''\\\\\\\dfrac{P^2V^2}{T^2}=constant\\\\\\\sqrt{\dfrac{P^2V^2}{T^2}}=\sqrt{constant}\\\\\\\dfrac{PV}{T}=constant

Thus:

          \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}

Which is<em> the combined law.</em>

4 0
4 years ago
Which of the following correctly identifies who is credited with key developments of the cell theory?
vampirchik [111]

Answer:

Matthias Schleiden, Theodor Schwann, and Rudolf Virchow

Explanation:

8 0
3 years ago
Over time people with AIDS become very sick and are unable to fight off infection. Use the information in the graph to explain w
dedylja [7]
There is no graph but the reason people who have aids cant fight it off is because it is an immune disease it quickly weakens the immune system and makes a persons body too weak to fight anything off.
6 0
3 years ago
Which compound is an unsaturated hydrocarbon
MariettaO [177]
Unsaturated hydrocarbons are those in which each carbon atom is attached to as many hydrogen atoms as it possibly can. There can be no double bonds or non-hydrogen functional groups, since these detract from the maximum possible number of hydrogens that each carbon can be attached to (in the case of double bonds, two carbons are bonded to each other when they could alternately be bonded to one more hydrogen each). All of the alkanes (including the cycloalkanes) are saturated hydrocarbons. Substituted alkanes, alkenes, alkynes, and their cyclic counterparts are all unsaturated.
5 0
4 years ago
Read 2 more answers
What are the products of the acid-base reaction between HNO3 and NaOH? A. H2O and NaNO3 B. NaH and NO3OH C. HNOH and NaO3 D. NaO
Otrada [13]

Answer:- A. H_2O and NaNO_3

Explanations:- In general, acid+base\rightarrow salt+water

In acid-base reaction the acid gives hydrogen ion and the base gives hydroxide ion and these ions combine to form water. Rest of the ions from acid and base combine to form the salt.

Nitric acid breaks to give hydrogen ion and nitrate ion. Similarly, NaOH breaks to give sodium ion and hydroxide ion. Since, hydrogen ion and hydroxide ions form water, the sodium ion and nitrate ion forms the salt, sodium nitrate.

The reaction is shown as:

HNO_3(aq)+NaOH(aq)\rightarrow NaNO_3(aq)+H_2O(l)

So, the right choice is A.

5 0
3 years ago
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