Answer:
When Kristen is running and her breathing rate increases, the statement that best describes how her tissues are responding to her running is that they need more oxygen to function, so gas exchange needs to increase.
Explanation:
Options for this question are:
They need more oxygen to function, so gas exchange needs to decrease.
They need more oxygen to function, so gas exchange needs to increase.
They need more carbon dioxide to function, so gas exchange needs to increase.
They need more carbon dioxide to function, so gas exchange needs to decrease.
Physical activity in a person requires an adequate supply of nutrients and oxygen to the tissues, to ensure the production of energy in the form of ATP, obtained from cellular respiration.
A physical exercise implies an increase in the skeletal muscle's ATP demand, so both glucose and oxygen consumption will be higher, which implies an increase in breathing rate to increase lung gas exchange and oxygen bioavailability.
Explanation:
Answer:
An object with a high mass close to the Earth could be sent out into a collision course with the asteroid, knocking it off course. When the asteroid is still far from the Earth, a means of deflecting the asteroid is to directly alter its momentum by colliding a spacecraft with the asteroid.
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Answer:
It is correct because iron is more reactive than silver.
Explanation:
Answer:
grams of oxygen = 21.40 g
Explanation:
octane → C8H18
The chemical reaction needs to be represented with a chemical equation before solving. The equation also need to be balanced.
C8H18 + O2 → CO2 + H2O
Balanced equation
2C8H18 + 25O2 → 16CO2 + 18H2O
Molar mass of octane = 12 × 8 + 18 = 96 + 18 = 114 g
Mass of octane in the chemical equation = 2 (114) = 228 g
molar mass of oxygen = 32 g
mass of oxygen in the chemical equation = 25 × 32 = 800 g
if 228 g of octane react with 800 g of oxygen
6.1 g of octane will require ? grams of oxygen
cross multiply
grams of oxygen = 6.1 × 800/228
grams of oxygen = 4880
/228
grams of oxygen = 21.4035087719
grams of oxygen = 21.40 g
So its temperature will not rise, since kinetic energy of molecules remains the same. The quantity of heat absorbed or released when a substance changes its physical phase at constant temperature (e g. From solid to liquid at melting point or from liquid to gas at boiling point) is termed as its latent heat.
