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
Dennis_Churaev [7]
3 years ago
10

You need to fill a basketball with air to play with it. You know that your pump expels air at a velocity of 6 cm/s. You know tha

t the volume flow rate of air being pumped into the basketball is 103 cm^3/s. What is the diameter of your needle?
Physics
1 answer:
Scrat [10]3 years ago
8 0

Answer:

The diameter of the needle is <u>4.675 cm</u>.

Explanation:

Given:

Volume flow rate is, \dot V=103\ cm^3

Velocity of air expelled by pump is, v=6\ cm/s

Let the area of the needle be 'A' cm² and the diameter be 'd' cm.

We know that, volume flow rate of the air expelled by pump is given as the product of the needle's area and velocity of air flowing through that area.

Therefore, volume flow rate is given as:

\dot V=A\times v\\\\103=A\times 6\\\\6A=103\\\\A=\frac{103}{6}\ cm^2

Now, considering the needle to be circular, area of the needle can be written as:

A=\frac{\pi}{4}\times d^2\\\\\frac{103}{6}=\frac{\pi}{4}\times d^2\\\\d^2=\frac{103\times 4}{6\pi}\\\\d=\sqrt{\frac{103\times 4}{6\pi}}\\\\d=4.675\ cm

Therefore, the diameter of the needle is 4.675 cm.

You might be interested in
A car travels west for 240 km in 4 h. what is the car's velocity?
nalin [4]
The velocity is 60 because you divide your distance by your time (240÷4=60)
4 0
3 years ago
Read 2 more answers
What are non-clastic?
igor_vitrenko [27]
Non clastic sedimentary rocks from chemical reactions, chiefly in the ocean. Nonclastic and clastic sedimentary rocks are the only members of the rock family that contain fossils as well as indicators of the climate that was present when the rock was formed.
8 0
3 years ago
The term necrosis means
aksik [14]

Necrosis - the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply.

Hope this helps, please mark me brainliest

6 0
3 years ago
How long does it take for changed in an ecosystem to be reversed
rusak2 [61]
That certain change from that ecosystem will require 50 years or longer because big ecosystems need a long time to restablize the living ecosystem.
5 0
3 years ago
I need help!! i’ll give 20 points
larisa86 [58]

Answer:

780 m to travel north

Explanation:

6 m over = 750

53 degree so it will take about 2 min to reach the destination

8 0
3 years ago
Other questions:
  • Which best explains how thermal energy is transferred when someone holds a hand above a fire?
    9·2 answers
  • The velocity of a motor car moving along a road increases from 10m/s to 50{1} ms in 8s. Find its avarege acceleration. RESULT
    15·1 answer
  • A parallel-plate capacitor is connected to a battery. The space between the two plates is empty. If the separation between the c
    14·1 answer
  • What is all matter made up of?
    14·2 answers
  • An observer in frame S sees lightning simultaneously strike two points 100 m apart. The first strike occurs at xx1 = yy1 = zz1 =
    8·1 answer
  • 5. A bus starting from rest accelerates in a straight line at a constant rate of 3m/s2 for 8s. Calculate the distance travelled
    14·1 answer
  • On the surface of Earth, a spacecraft has a mass of 2.00 x 104 kilograms. What is the mass of the spacecraft at a distance of on
    15·1 answer
  • Help me please pleasee
    9·1 answer
  • First use of electricity<br> Greece<br> Itally<br> Allentwon<br> California
    11·1 answer
  • A physical quantity, G, is defined by G = (Original mass x time)/(change in mass), what is the S.I. unit of G ?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!