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
nasty-shy [4]
4 years ago
5

Two horizontal pipes are the same length, but pipe B has twice the diameter of pipe A. Water undergoes viscous flow in both pipe

s, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe A is Q = , what is the flow rate in pipe B?
Physics
1 answer:
charle [14.2K]4 years ago
4 0

Answer:

flow rate in pipe B is 16 times the flow in pipe A

Explanation:

According to the poiseuille's law, flow rate  is is given as

Q = \frac{ \pi Pr^{4}}{8\eta*L}

Flow rate  in the pipe will remain same as above i.e,

Q_{A} = \frac{\pi Pr^{4}}{8\eta*L}

Flow in the pipe be will be

As diameter OF PIPE B is doubled

AND length of both pipes remained same

Q_{B} = \frac{\pi P(2r)^{4}}{8\eta*L}

          = \frac {16\pi P(r)^{4}} {8\eta*L}}

          so we have

flow rate in pipe B is 16 times the flow rate  in pipe A

You might be interested in
Every 4 years we have a leap year on our calander to make up the extra.......
OverLord2011 [107]

The Earth takes very nearly (365 and 1/4) days to go around the sun.

If our calendar always had 365 days, then the year would end and re-start
too soon, and the beginning of Spring (and every other season) would
eventually drift into the months after March.

If our calendar always had 366 days, then the year would end and re-start
too late, and the beginning of Spring (and every other season) would
eventually drift into the months before March.

We can't make calendars with an extra quarter-day in each year.  But we
keep them lined up with the real year by saving up the quarters, and adding
one full day to the calendar every 4 years.

7 0
3 years ago
A 7.75-l flask contains 0.482 g of hydrogen gas and 4.98 g of oxygen gas at 65°c. What is the partial pressure of oxygen in the
dimulka [17.4K]

Answer:

0.558 atm

Explanation:

We must first consider that both gases behaves like ideal gases, so we can use the following formula: PV=nRT

Then, we should consider that, whithin a mixture of gases, the total pressure is the sum of the partial pressure of each gas:

P₀ = P₁ + P₂ + ....

P₀= total pressure

P₁=P₂= is the partial pressure of each gass

If we can consider that each gas is an ideal gas, then:

P₀= (nRT/V)₁ + (nRT/V)₂ +..

Considering the molecular mass of O₂:

M O₂= 32 g/mol

And also:

R= ideal gas constant= 0.082 Lt*atm/K*mol

T= 65°C=338 K

4.98 g O₂ = 0.156 moles O₂

V= 7.75 Lt

Then:

P°O₂=partial pressure of oxygen gas=  (0.156x0.082x338)/7.75

P°O₂= 0.558 atm

3 0
4 years ago
When the weight of the object increase block what is the force of friction applied? Explanation?
erik [133]

Answer:

There is absolutely No relationship between the weight of an object (which is constant) and the frictional force. If a block is sliding on a surface, that surface will be exerting a force on the block. That force can be resolved into a component parallel to the surface (which we call the frictional component), and a component perpendicular to the surface (called the normal component). For many situations, we find experimentally that the frictional component is approximately proportional to the normal component. The frictional component divided by the normal component is defined to be a quantity called the coefficient of kinetic or sliding friction. The coefficient of kinetic friction obviously depends on the nature of the surfaces involved. The normal component on an object can be decreased if you pull in the direction of the normal component (the weight does not change). However pulling this way on the object not only decreases the normal component, but it also decreases the frictional component since they are proportional. This is why it is easier to slide something if you pull up on it while you push it. If you push down, the normal and frictional components increase so it is harder to slide the object. The weight of an object is the downward force exerted by Earth’s gravity on that object, and it does not change no matter how you push or pull on the object.

8 0
3 years ago
Calculate the velocity of the objects motion represented in the following graph. Show all your work.
Leni [432]

as we know that velocity= displacement/change in time

hence velocity here is= 11-3/12-0

=8/12

=2/3

=0.667m/s

hopefully i am right

6 0
3 years ago
How long will it take an object to move 100 meters if the object is traveling with an average speed of 0.5 meter per second
ladessa [460]

Input:

s = 100 m

v = 0.5 m/s

t = ?


Equation:

v = s / t

t = s / v


t = 100 [m] / 0.5 [m/s]

t = 200 s


Answer: 200 seconds.

7 0
4 years ago
Other questions:
  • A change in color during a reaction is often a sign that a chemical change has occurred.
    9·2 answers
  • A horizontal steel bar of uniform mass density and mass 5kg is supported by two vertical steel cables atteached to the ends of t
    8·1 answer
  • rank the following media from fastest to slowest for a light wave to travel through 1 being fastest 4 being slowest ( a. gas, b.
    6·1 answer
  • What is the temperature of a gas in which the atoms are moving very very slowly?
    12·1 answer
  • Express 1010 miners in examiners. Answer in units of Eminer.
    6·1 answer
  • Which sentences describe disadvantages of burning fossil fuels instead of using hydrogen fuel cells? Burning fossil fuels contri
    7·2 answers
  • Which term describes the forces on object with zero net force​
    6·1 answer
  • Some sharks can swim at average cruising speeds of three miles per hour. If a shark swam at that average speed for seven hours,
    14·1 answer
  • Ini adalah anjing<br>this is a dog<br><br>​
    11·1 answer
  • a golfer hits a golf ball giving it an initial velocity 30m/s at an angle 45° from the horizontal. ignoring air resistance on a
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!