Question

The average adult heart pumps about 84./mls of blood at 72 beats per minute. suppose you need to calculate how long it would take the average heart to circulate 6600.ml of blood.

Answer 1

Data and interpretation:

84 ml/s of blood  at 72 beats per minute: this means that the heart pumps 84 mililiter of blood per second, at 72 beats per minute

Question: how long it takes to pump 6600 ml?

Solution:

Calculate how many times is 84 contained in 6600

6600 ml / 84 ml/s = 78.6 s

Answer:78.6s

Answer 2

The heart takes $\boxed{79{\text{ s}}}$  to circulate $6600{\text{ mL}}$  of blood.

Explanation:

The average rate of blood pumping by adult heart at rate of $72$  beats per minute is $84{\text{ }}{{{\text{mL}}}\mathord{\left/{\vphantom{{{\text{mL}}}{\text{s}}}}\right.\kern-\nulldelimiterspace}{\text{s}}}$ .

Our aim is to obtain the time required by heart to circulate $6600{\text{ mL}}$  of blood.

The rate $84{\text{ }}{{{\text{mL}}}\mathord{\left/{\vphantom{{{\text{mL}}}{\text{s}}}}\right.\kern-\nulldelimiterspace}{\text{s}}}$  can be referred as the adult heart pumps  $84$ milliliters of blood in one second at the rate of $72$  beats per minute.

Consider $t$  be the time required for heart to pump $6600{\text{ mL}}$  blood.

Since, in one second the heart pumps $84{\text{ }}{{{\text{mL}}}\mathord{\left/{\vphantom{{{\text{mL}}}{\text{s}}}}\right.\kern-\nulldelimiterspace}{\text{s}}}$  and this can be written as,

$84{\text{ mL}}\Rightarrow 1{\text{ second}}$

In $t$  second the heart will pump $6600{\text{ mL}}$  of blood and this can be written as,

$6600{\text{ mL}}\Rightarrow t{\text{ second}}$

The value of $t$  is calculated as shown below.

$\begin{aligned}t&=\frac{{6600{\text{ mL}}\times 1{\text{ second}}}}{{84{\text{ mL}}}}\\&=\frac{{6600}}{{84}}{\text{ seconds}}\\&=78.57{\text{ seconds}}\\&\approx 79{\text{ s}}\\\end{aligned}$

Therefore, it takes heart to circulate $6600{\text{ mL}}$  of blood in approximately $79{\text{ s}}$.

Since, blood can flow so it is called as fluids. Fluid has no fixed shape and having definite volume.

The expression for density for any fluid can be written as,

$\rho=\frac{m}{V}$

Here, ${{\rho }}$  is density, $m$  is the mass of the fluid and $V$  is the volume of fluid.

Thus, the heart takes $\boxed{79{\text{ s}}}$  to circulate $6600{\text{ mL}}$  of blood.

Learn More:

1. Volume brainly.com/question/4593217

2. Gravity brainly.com/question/1675037

3. Energy brainly.com/question/1807873

Answer Details:

Grade: High School

Subject: Physics

Chapter: Fluids

Keywords:

Heart, pumps, 84 mL/s, blood, 72 beats, minute, long, average , circulate, 79 s, 6600 mL, fluids, property, calculate.