1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
kobusy [5.1K]
4 years ago
8

8. Humans need oxygen to break down food in order to provide energy for cells. The oxygen needed for this process is delivered b

y an organ system called the A. respiratory system. B. lungs. C. digestive system. D. alveolus.
Physics
2 answers:
Marina86 [1]4 years ago
7 0

Answer:

The answer is B. Lungs

Aleonysh [2.5K]4 years ago
7 0

Answer: B

Explanation: we use lungs to breathe, so we take oxygen by lungs.  

You might be interested in
How high would the level be in a gasoline barometer at normal atmospheric pressure?
Sergio [31]

Answer:

h = 13.06 m

Explanation:

Given:

- Specific gravity of gasoline S.G = 0.739

- Density of water p_w = 997 kg/m^3

- The atmosphere pressure P_o = 101.325 KPa

- The change in height of the liquid is h m

Find:

How high would the level be in a gasoline barometer at normal atmospheric pressure?

Solution:

- When we consider a barometer setup. We dip the open mouth of an inverted test tube into a pool of fluid. Due to the pressure acting on the free surface of the pool, the fluid starts to rise into the test-tube to a height h.

- The relation with the pressure acting on the free surface and the height to which the fluid travels depends on the density of the fluid and gravitational acceleration as follows:

                                         P = S.G*p_w*g*h

Where,                              h = P / S.G*p_w*g

- Input the values given:

                                         h = 101.325 KPa / 0.739*9.81*997

                                         h = 13.06 m

- Hence, the gasoline will rise up to the height of 13.06 m under normal atmospheric conditions at sea level.

7 0
3 years ago
What sport was invented to keep athleates warm in the winter
tankabanditka [31]

Answer:

Basketball

Explanation:

Basketball was invented to keep athletes warm in the winter.

5 0
3 years ago
Read 2 more answers
What step in the water cycle involves returning of fresh water to the Earth?
7nadin3 [17]

Hi!


Condensation is crucial to the water cycle because it is responsible for the formation of clouds. These clouds may produce precipitation, which is the primary route for water to return to the Earth's surface within the water cycle. Condensation is the opposite of evaporation.



Hope this helps!

~CoCo

3 0
3 years ago
Read 2 more answers
If you are driving your car at 45.0 miles per hour, and you have been driving 2.50 hours, how far has your car gone?
Greeley [361]

Answer:

113 miles

Explanation:

45.00 x 2.50= 1.12.5 so 113 miles in 2.50 hours

5 0
3 years ago
The graph below shows the percentage of unstable nuclei remaining of a radioactive isotope.
mafiozo [28]

i have no clue, sorry. jus tryna get points

8 0
3 years ago
Other questions:
  • A basketball rolls to a stop along a gym floor without anyone touching it. What answer choice BEST explains why this occurred?
    6·2 answers
  • What is the structure located inside the nucleus of a cell that contains an organism’s genetic code?
    7·1 answer
  • Which statement is true about voice?
    8·2 answers
  • Anita holds her physics textbook and complains that it is too heavy. Andrew says that her hand should exert no force on the book
    12·2 answers
  • A battery-operated car moves forward as a result of which device? Electromagnet, generator, motor, or a transformer?
    7·2 answers
  • 3. A certain horizontal east-west lined wire has a mass of 0.2kg per meter of length and carries a current I. Impressed on the w
    10·1 answer
  • Una ave vuela a una velocidad constante de 15m/s en una trayectoria rectilínea. Si dura una hora volando ¿cuanta distancia habrá
    7·1 answer
  • What is the displacement if I walk three blocks east two blocks south one block west and two blocks north
    13·1 answer
  • Both physical and chemical changes are accompanied by a change in the total energy of the system, which is divided into two broa
    11·1 answer
  • You can take your heart rate using:
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!