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
Elena-2011 [213]
3 years ago
13

Each day, the human heart pumps about 7500 liters of blood. As a simple approximation, assume that the work done by the heart is

equal to the work required to lift this amount of blood from a person's feet to their head. Estimate the amount of work a person's heart does in a day if that person is 1.5 m tall. (Note that the density of blood is 1050 kg/m3  and 1 liter = 0.001 m3.) Given this approximation, what is the power output of this person's heart?
Mathematics
1 answer:
erik [133]3 years ago
7 0

Answer with Step-by-step explanation:

We are given

Volume of blood=V=7500 L=7500\times 0.001=7.5 m^3

1 liter=0.001 m^3

Height of person=h=1.5 m

Density of blood,\rho=1050 kg/m^3

We have to find the work done and power of person's heart.

We know that

Work done,W=mgh=\rho Vgh

Where g=9.8 m/s^2

Using the formula

W=1050\times 7.5\times 9.8\times 1.5=1.16\times 10^5 J

Time,t=1 day=24\times 60\times 60=86400 s

Power, P=\frac{W}{t}

Using the formula

P=\frac{1.16\times 10^5}{86400}=1.34 Watt

You might be interested in
Please help!!! Multiply. Write your answer in scientific notation. (5×10 – 8)(1×103)<br><br> 20 pts
PolarNik [594]

Answer:

4.326 x 10^ 3

Step-by-step explanation:

Correct me if wrong please :)

4 0
3 years ago
Nicolas reads 3 books in 5 days which is a rate approximately how many books per day.
Dahasolnce [82]

Answer:

60

Step-by-step explanation:

I times 20 x 3 = 60 because each days us 3 and I use my fingers to count

7 0
3 years ago
If the porprotion of defective in the sample is less than 12%, it is reasonable to conclude that the new process is better.
Anuta_ua [19.1K]

answer: false

Step-by-step explanation: The probability of it being true is 40% and the probability of it being false is 60% so i think it would be better to go with false

5 0
3 years ago
Ernest earned $8.55 per hour plus an additional $90 in tips waiting tables on Friday. He earned at least $160 in all.
kvasek [131]

What are you trying to find?

6 0
3 years ago
The question is on the sheet ​
Ghella [55]
Y=1/2x-5 is the answer
6 0
2 years ago
Other questions:
  • 4x +6y =0
    13·2 answers
  • Approximate the following numbers to the nearest whole number
    13·1 answer
  • Based on the data given, in what direction will the car accelerate?
    10·1 answer
  • For each value of w, determine wheather it is a soultion to -5 -6w ≤7
    13·1 answer
  • What are the roots of f(x)=x^2-48 CANT MOVE ON TILL I ANSWER
    9·1 answer
  • Decimals- do i move the decimal when adding or multiplying
    12·1 answer
  • 8miles in 1 hour write an expression of the total distance
    9·2 answers
  • Chen's pocket holds 10 coins: 3 quarters, 4 dimes, 1 nickle, and 2 pennies. What are the chances that he first randomly pulls ou
    7·1 answer
  • People will do you wrong over and over, but the one time you call them out your suddenly the bad guy.
    8·1 answer
  • Solve the given system of equations.<br><br><br> The solution to the system is ( , ).
    5·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!