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Studentka2010 [4]
3 years ago
6

Heat rising in a hot-air balloon is an example of __________.

Biology
1 answer:
gayaneshka [121]3 years ago
8 0
B convection is the correct answer
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Water can seep into rocks and dissolve minerals. The dissolved minerals can be washed away. What type of weathering is this? Exp
aliya0001 [1]
Any process that exerts a stress on a rock that eventually causes it to break into smaller fragments is a type of mechanical weathering. 
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3 years ago
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How does the force of friction affect the motion of objects?(2 points)
ser-zykov [4K]

Answer:

It causes the object to slow down or stop.

Explanation:

Friction is a unknown force pressing against another force slightly, making the moving object slow down.

Hope I help :)

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How does the carbon and nitrogen cycle work together?
masha68 [24]
The carbon cycles recycles caronatoms(carbon dioxide) and the nitrogen cycle recycles nitrogen.and the carbon cycle makes carbon dioxide and the carbon dioxide goes to the trees ,and the trees get the nitrogen and starts the cycle again.
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3 years ago
What does a blood pressure of 120/70 tell you?
Mekhanik [1.2K]

Answer:

The correct answer is option 'D':During ventricular systole, the left ventricle generates more than 120 mmHg .

Explanation:

A blood pressure of 120 mm Hg means that during the ventricular systole the blood leaves the ventricles to the rest parts of the body the pressure that it exerts on the walls of the arteries equals pressure exerted by a column of 120 mm of mercury. At the peak flow the pressure should be just exceed 120mm Hg in order to initiate circulation. The excess pressure is needed as we need to overcome the resistance of the blood in the arteries that is at a pressure of 120 mmHg

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3 years ago
When you breathe, the pressure inside the lungs is different than the pressure outside the lungs. This is an example of a(n) ___
ICE Princess25 [194]

Answer:

pressure gradient

Explanation:

The correct answer would be pressure gradient.

<em>A pressure gradient is created when there is a difference in the amount of pressure between two points or locations that are adjacent to one another.</em>

In this case, the two locations that are adjacent to one another are the inside and outside of the lung. When one breathes in, the pressure inside the lung is more than that of the outside and the lung expands as a result. When we breathe out, the pressure outside is more than that of the inside and the lung collapses.  

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