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3 years ago

molly investigated if the age of students caused them to be better drivers. what is the independent variable?

2 answers:

7 0

The independent variable is the age of the students because it’s what affects their ability to be better drivers. The driving-level is dependent on their age. :)

Ludmilka [50]3 years ago

5 0

Answer:

The independent variable is the age of the students because it’s what affects their ability to be better drivers

Explanation:

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The inuit peoples of the arctic are classified as:

Furkat [3]

The people of the Canadian Arctic are known as the Inuit. They used to be called Eskimos, which came from a Native American word for 'eater of raw meat'. Now the Arctic people are officially known as the Inuit, which means 'the people', or singularly, Inuk, which means 'the person’ hope this helps!

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3 years ago

How does an understanding of

Nina [5.8K]

Answer:

Energy is if not the most fundamental unit of everything, along with matter, space and time, thus it is one of the foundations of all science.

Explanation:

Energy in science is like words in a book, you could not read the book without words, similarly, there would be no way to do science without energy. Take this example You can only measure the *speed* of an object if it has energy.

We could look at biolgy and see how photosynthesis makes use of energy. In photosynthesis we see plant cells converting energy from the sun into usful sugars to help the plant grow.

Now we could look at astronomy and see how energy is used, If you observe stars you can see the different brightnesses and masses, which tells you alot about what type of energy conversion is happening inside the star (nuclear fusion).

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2 years ago

What is the role of digestion in cellular respiration?

kaheart [24]

<span>Our body uses glucose for our main source of energy. We take in many sugars in our diet. Break down of these sugar begin in the mouth by saliva. The majority of break down and absorption of sugars occur in the small intestine. Sugars are broken down to monosaccharides to include glucose which is the main source used to produce energy in our body by cellular respiration. </span>

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3 years ago

The movement of molecules from high concentration to low concentration is called

Sati [7]

Answer:

Diffusion

Explanation:

Diffusion is a process of passive transport in which molecules move from an area of higher concentration to one of lower concentration.

4 0

3 years ago

Solid sodium reacts with liquid water to form hydrogen gas according to the equation 2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g) Wha

lana66690 [7]

Answer: 21850.42mmHg or 28.78atm

Explanation: From the equation of the reaction, 2 moles of sodium reacts with 2 moles of water to produce 2 moles of NaoH and 1 mole of hydrogen gas at s.t.p.

molar volume of gas at s.t.p. = 22.4dm^3,

standard temperature = 0°C or 273K,

standard pressure = 760mmHg or 1atm,

molar mass of Na = 23g;

volume of the container= 20L or 20dm^3

From the equation, 2 moles or 46g of Na produces i mole or 22.4 dm^3 of hydrogen.

Therefore, 1kg or 1000g of Na will produce 22.4 * 1000/(46)= 486dm^3 of hydrogen.

To find the pressure of the gas produced, the formula P1V1/T1 = P2V2/T2

P1= 760mmHg, T1= 273K, V1 (initial volume of gas)= 486dm^3, T2=50.0°C or 50+273K= 323K, V2( final volume of gas= volume of vessel)=20dm^3 P2=?

P1= P1V1*T2/(V2T1)= 760mmHg * 323/(273)= 21850.42mmHg or 1atm*21850.42/760= 28.78atm

5 0

3 years ago