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3 years ago

EXTRA POINTS

Biology

1 answer:

HACTEHA [7]3 years ago

3 0

Answer:

Surface A.

Explanation:

The box stops faster than other surfaces here.

This means the surface applies greater frictional force to the box conpared to others.

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1) Why do we Respire ? GUD MRG FRNDS .

Ostrovityanka [42]

Answer:

Everyday functions of the body like digesting your food, moving your muscles or even just thinking, need oxygen. When these processes happen, a gas called carbon dioxide is produced as a waste product. The job of your lungs is to provide your body with oxygen and to get rid of the waste gas, carbon dioxide.

Explanation:

Hope it helps you ✌️

6 0

3 years ago

Read 2 more answers

Oxygen is a by-product of ______________ and is needed by living organisms for the process of ______________.

Katyanochek1 [597]

The answer is D, photosynthesis and respiration.

—Evidence—

Oxygen is a byproduct of photosynthesis and, correspondingly, carbon dioxide the byproduct of respiration.

Oxygen gives our cells the ability to break down food in order to get the energy we need to survive. Although other animals may use different organs to breathe with, they all get oxygen into their bodies through respiration.

4 0

3 years ago

The Sun's spectrum contains spectral lines from neutral sodium and calcium as well as ionized magnesium and iron. Of the choices

Maru [420]

The correct answer of the given question above would be the second option, option B. 5,800 K. The surface temperature of the Sun is 5,800 K since given above, the Sun's spectrum contains spectral lines from neutral sodium and calcium as well as ionized magnesium and iron. Hope this answer helps.

4 0

3 years ago

If the sequence of nucleotides on the original DNA strand was A – G – G – C – T – A,

vladimir1956 [14]

Answer:

U-C-C-G-A-U

Explanation:

3 0

3 years ago

- Calculate the molar mass of a gas that has a density of 1.55g/L.

VLD [36.1K]

Answer: 39.86 g/mol

Explanation:

Assuming this gas is at a pressure of $0.99 atm$ and a temperature of $37 \°C+273.15=310.15 K$ , we can solve this problem with the Ideal Gas Law equation:

$P.V=n.R.T$ (1)

Where:

$P=0.99 atm$ is the pressure of the gas

$V$ is the volume of the gas

$n$ the number of moles of gas

$R=0.0821 \frac{atm.L}{mol.K}$ is the gas constant

$T=310.15 K$ is the absolute temperature of the gas in Kelvin

On the other hand, we know the density $\rho=1.55 g/L$ is given by a relation between the mass $m$ and the volume $V$ :

$\rho=\frac{m}{V}$ (2)

Then, the mass is:

$m=\rho V$ (3)

Another important fact here is that the molar mass $M_{mass}$ of an element is given by a relation between the mass of that element and the number of moles $n$ it contains: