All categories

3 years ago

With circulation, the heart provides your body with:

Chemistry

1 answer:

Ivanshal [37]3 years ago

8 0

<h3>Answer: D) all of the above</h3>

Explanation:

The lungs pump oxygen in and carbon dioxide out, which goes through the blood stream to help with the cell's energy needs.

Nutrients pass through the blood stream as well. The nutrients start with the digestive system (mouth, esophagus, stomach, small intestine) before going into the blood stream. The nutrients are building blocks to help make new cells when old ones die off.

When those cells die off, the body sheds them like dead skin, but internal dead cells are passed off as waste. This waste and other byproducts the body doesn't need passes through the blood stream as well.

In short, the blood stream is basically the highway to help get desired materials (eg: oxygen and nutrients) and get rid of waste (eg: carbon dioxide and other unwanted byproducts or dead cell material)

So that's why the answer includes A, B and C.

You might be interested in

Calculate the amount of heat energy, in kJ, needed to increase the temperature of 200g of water by 300 C.

shtirl [24]

Answer:

Q = 246 kJ

Explanation:

It is given that,

Mass of water, m = 200 g

Let initial temperature, $T_i=5^{\circ}$

Final temperature of water, $T_f=300^{\circ} C$

We know that the specific heat capacity of water, $c=4.18\ J/g-^{\circ} C$

So, the heat energy needed to raise the temperature is given by :

$Q=mc\Delta T\\\\Q=200\times 4.18\times (300-5)\\\\Q=246620\ J$

Q = 246 kJ

So, the heat energy of 246 kJ is needed.

8 0

4 years ago

What are gravitational forces?

Kruka [31]

Answer:

Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.

Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects

The gravitational force is a force that attracts any two objects with mass. We call the gravitational force attractive because it always tries to pull masses together, it never pushes them apart. In fact, every object, including you, is pulling on every other object in the entire universe!

Gravitational force is the force that attracts to objects with mass. ... This forces tries to pull masses together, that is why attractive in nature. For example: When ball is thrown upwards it always come downwards after a certain height because the ball is pulled or attracted by the Earth's gravitation la force.

¯\_(ツ)_/¯

3 0

3 years ago

Read 2 more answers

Is primarily responsible for acid rain in the northeast United States Uranium-238 Answer A: Uranium-238 A Coal Answer B: Coal B

Georgia [21]

Based on the available facts, in the northeast United States, the biggest source of acid rain producing pollutants comes from the burning of coal by power plants to produce electricity.

Acid rain occurs when gases such as sulfur (iv) oxide and nitrogen oxides which are released from the burning of fossil fuels such as petrol and coal are released into the atmosphere, which then dissolve in rainwater and fall as acid rain.

These gases are known as acid anhydrides because they dissolve in water to produce acids.

In the northeast United States, the biggest source of acid rain producing pollutants comes from the burning of coal by power plants to produce electricity.

Learn more about acid rain at: brainly.com/question/718250

3 0

3 years ago

Is Squeezing oranges to make orange juice a chemical or physical change?

a_sh-v [17]

Squeezing just the juices out of the orange, like with your hand or whatever you use, is a physical change. yes :)

7 0

3 years ago

Read 2 more answers

A dextrose/saline aqueaout solution doctors commonly use to replace fluids in the body contains 1.75g/L NaCl and 40.0g/L dextros

qwelly [4]

<em>Mixed molarity = 0.25 M</em>

<em>Osmotic pressure solution: 6.15 atm</em>

<h3><em>Further explanation</em></h3>

Osmotic pressure is the minimum pressure given to the solution so that there is no osmotic displacement from a more dilute solution to a more concentrated solution.

General formula:

$\large{\boxed {\bold {\pi \: = \: M \: x \: R \: x \: T}}}$

π = osmotic pressure (atm)

M = solution concentration (mol / l)

R = constant = 0.08205 L atm mol-1 K-1

T = Temperature (Kelvin)

Mixing solution

To find the molarity of the mixed solution we can use the following formula:

Vc. Mc = V1.M1 + V2.M2

where

Mc =Mixed molarity

Vc = mixed volume

Mr. NaCl = 58.5

Mr. Dextrose = C₆H₁₂O₆ = 180

mole NaCl = gram / Mr

mole NaCl = 1.75 / 58.5 = 0.03

Dextrose mole = 40/180 = 0.22

Assuming 1 liter of solution

M mixture = mole NaCl + mole dextrose / 1 liter

M mixture = 0.03 + 0.22 / 1 L

M mix = 0.25 M

T = 25 + 273 = 298 K

The osmosis pressure of the solution becomes:

π = 0.25. 0.0825. 298 = 6.15 atm

<h3><em>Learn more</em></h3>

The osmotic pressure brainly.com/question/8195553

<h3><em>Answer details </em></h3>

Grade: Senior High School

Subject: Chemistry

Chapter: Colligative property

Keywords: osmotic pressure, molarity, mole,dextrose, NaCl

7 0

3 years ago