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4 years ago

The sun is important to is because of the heat it provides. The sun is just one of ________ of stars in the universe.

1 answer:

3 0

The sun is just one of the uncountable stars in the universe, as there are more than billions of galaxies containing billions of stars.

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Blood is accelerated from rest to 30.0 cm/s in a distance of 1.80 cm by the left ventricle of the heart. (a) Make a sketch of th

Mila [183]

Answer:

a. Picture attached

b. V, X

c. $t=0.12 s$

d. It makes sense cosidering that a normal heart beat rate is between 60 and 100 beats per minute (bpm).

Explanation:

First we have to identify the unknown of this problem:

$a: acceleration\\t: time$

Considering the characteristics of the problem and that distance and velocity are specified, the acceleration is constant, for that reason we use the equations of uniformly accelerated motion as follows:

$v=v_{0}+at\\ x=x_{0}+ v_{0}+\frac{1}{2}at^{2}$

If we reorganize the equations, considering that $x_{0}$ and $v_{0}$ are zero because motion starts from rest , we have:

$a=\frac{v}{t} \\x=\frac{1}{2}at^{2} =\frac{1}{2}\frac{v}{t} t^{2}=\frac{1}{2} vt\\t=\frac{2x}{v} \\t=\frac{2*1.80cm}{30.0\frac{cm}{s} } \\t=0.12 s$

Finally, the analysis of the result leaves us to understand why the normal heart beat rate varies between 60 and 100 bpm.

6 0

3 years ago

What is static electricity and how does it differ from current electricity

sp2606 [1]

Answer:

1. Static electricity is caused by the build up of electrical charges on the surface of objects, while current electricity is a phenomenon from the flow of electrons along a conductor. 2. When objects are rubbed, a loss and/or gain of electrons occurs, which results in the phenomenon of static electricity.

Explanation:

3 0

3 years ago

Mr. F has taken in a lot of fluid and put out very little. During this period his heart rate has increased a little and his bloo

mezya [45]

Answer:

Explanation:

What can be infer from Mr. F situation is that his body is raising blood pressure by both increasing blood volume with all this fluid intake and increasing heart rate. Something may be wrong with his blood volume.

4 0

3 years ago

Explain the difference between Longitudinal and Transverse waves.

masya89 [10]

The answer is C sorry if it’s wrong

4 0

3 years ago

What is the mass in grams of 5.50 × 1014 lead (pb) atoms?

olchik [2.2K]

There will be no way that to happen aton is a positive charge

8 0

3 years ago