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
Tom [10]
3 years ago
6

Some miners wish to remove water from a mine shaft. A pipe is lowered to the water 90 m below, and a negative pressure is applie

d to raise the water. (a) Calculate the pressure needed to raise the water. (b) What is unreasonable about this pressure? (c) What is unreasonable about the premise?
Physics
1 answer:
WITCHER [35]3 years ago
4 0

Answer:

Explanation:

Given

Pipe is lowered to the water h=90\ m

Negative Pressure is applied to raise the water

Pressure is given by

P=\rho gh

where P=pressure

\rho =Density

h=depth

P=10^3\times 9.8\times 90

P=8.82\times 10^{5}\ N/m^2\approx 8.82\ atm

(b)8.82 atm is much lower than the vapor pressure of water

(c)The fact of applying a negative pressure of 8.74 below the vapor pressure of water

You might be interested in
which religious group did not expand their membership by great numbers during the Second Great Awakening
Dimas [21]

Answer:

The Catholics.

Explanation:

see answer.

4 0
3 years ago
Describe how one plays Dr.Dogeball​
JulsSmile [24]
•To play Dr. Dodgeball you need to have 2 teams to verse each other.
•Next, select one person from each team to be the doctor (depending on the size of the teams you can have varying amounts of doctors)
•Continue to play dodgeball how you normally would
•When a player gets hit and is “out” they have to sit on the ground and wait for the doctor to “revive them” (this usually requires the doctor dragging,touching, or moving the player that is out to a “revival place” which is usually decided on by the advisor or person in charge.
•Finally, try to get all the doctors and players out from the other team. Get the doctors first, for they cannot revive themselves. Which means the other players are out after they get hit with a ball since the doctors are out. (Some games are played where if all doctors are out the game ends)
Hope this helped! Play on! And plz mark brainliest lol this was long to write :D
4 0
3 years ago
Which expression is equivalent to 5(2+7)? 0 2(5+7) O 2 + 7(5) O 5(2)+7 O 5(2)+5(7)​
professor190 [17]

Answer:

5(2)+5(7)

Explanation:

5(2)+5(7)=10+35=45

6 0
3 years ago
What is the acceleration of the box shown below.
olga nikolaevna [1]

Answer:

D) 1.0m/s^2

Explanation:

Force = 50 - 30 = 20

Acceleration = 20/20

= 1

3 0
2 years ago
Read 2 more answers
Which phrase best describes wave motion?
Fittoniya [83]
I think the correct answer from the choices listed above is option A. Wave motion is a  movement of energy through space or a medium . Some waves are visible light waves, heat waves, sound waves and the like. Hope this answers the question.
6 0
4 years ago
Other questions:
  • What is the study of energy and how it affects matter called?
    8·1 answer
  • A beam of red light and a beam of blue light have exactly the same energy. Which beam contains the greater number of photons?
    7·1 answer
  • Sam is observing the velocity of a car at different times. After two hours, the velocity of the car is 54 km/h. After four hours
    5·1 answer
  • Physics help! I really need this homework done:
    8·1 answer
  • Two enery converrsation that take place when you warm a cup of cocoa in a microwave<br> Oven
    13·1 answer
  • All matter requires its own space. true or false
    13·2 answers
  • Consider an electron that is 10-10 m from an alpha particle (9 = 3.2 x 10-19 C). (Enter the magnitudes.) (a) What is the electri
    13·1 answer
  • When a front wheel drops off the roadway you should?
    8·1 answer
  • If an input force of 202N is applied to the handles of the wheelbarrow in the sample problem how large is the output force that
    5·1 answer
  • Which class of hazards is characterized by thermal and mechanical hazards in the form of blast pressure waves, shrapnel and frag
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!