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
ella [17]
2 years ago
8

A research submarine has a 10-cm-diameter window that is 8.4 cm thick. The manufacturer says the window can withstand forces up

to 1.2×106 N . What is the submarine's maximum safe depth in salt water?
The pressure inside the submarine is maintained at 1.0 atm .
Express your answer using two significant figures.
Physics
2 answers:
Dmitrij [34]2 years ago
8 0
Pnet = Po + dgh 

<span>Density of saltwater = 1030 kg/m^3. </span>

<span>Disregard the thickness. Assuming it's a circular window, then the area is pi(r^2). </span>

<span>d = 20 cm = 0.2 m </span>
<span>r = d/2 = 0.1 m </span>

<span>A = pi(r^2) </span>
<span>A = 3.14159265(.1^2) </span>
<span>A = 0.0314159265 m^2 </span>

<span>p = F/A </span>
<span>p = (1.1 x 10^6) / (0.0314159265) </span>
<span>p = 35,014,087.5 Pa </span>

<span>1 atm = 101,325 Pa </span>

<span>P = Po + dgh </span>
<span>h = (P - Po) / dg </span>
<span>h = (35,014,087.5 - 101,325) / (1030 x 9.81) </span>
<span>h = 3 455.23812 m </span>
<span>h = 3.5 km</span>
motikmotik2 years ago
8 0

Answer: 15 km

Explanation:

The maximum pressure that the submarine can withheld would be equal to the maximum pressure that the window can withstand.

The maximum pressure that window can sustain is given by:

Pressure\frac{force}{Area]

Force = 1.2×10⁶ N

Area of the window = \pi r^{2}= 7.85\times 10^{-5} m^2

∵radius = (0.1 m)/2 = 0.05 m

⇒P = 1.2×10⁶ N ÷ 7.85 ×10⁻³ m² = 1.52 ×10⁸ N/m²

The pressure of the salt water at depth h is given by

P = ρ g h

where, ρ = 1027 kg/m³ is the density of the salt water, g is the acceleration due to gravity and h is the depth.

⇒1.52×10⁸ Pa =  (1027 kg/m³)(9.8 m/s²)(h)

⇒ h ≈ 15 km

You might be interested in
What information can be determined by observing dark lines within the spectrum of a given star?
Scrat [10]
I believe the answer is D.  
6 0
2 years ago
A school bus moves slower and slower. Using what you have learned about forces, explain why the bus moves slower and slower.
Levart [38]

Answer:

I don't exactly know what you learned but it could be because of more friction or the bus was running out of gas.

4 0
2 years ago
How many sides does a dodecahedron have?
Serhud [2]

Answer:

twelve facesFrom left to right the solids are tetrahedron (four sides), cube (six sides), octahedron (eight faces), dodecahedron (twelve faces), and icosahedron (twenty faces).

Explanation:

Ayo hope you enjoy

8 0
2 years ago
Read 2 more answers
The equation Bold r (t )equals(8 t plus 9 )Bold i plus (2 t squared minus 8 )Bold j plus (6 t )Bold k is the position of a parti
KATRIN_1 [288]

Explanation:

It is given that, the position of a particle as as function of time t is given by :

r(t)=(8t+9)i+(2t^2-8)j+6tk

Let v is the velocity of the particle. Velocity of an object is given by :

v=\dfrac{dr(t)}{dt}

v=\dfrac{d[(8t+9)i+(2t^2-8)j+6tk]}{dt}

v=(8i+4tj+6k)\ m/s

So, the above equation is the velocity vector.

Let a is the acceleration of the particle. Acceleration of an object is given by :

a=\dfrac{dv(t)}{dt}

a=\dfrac{d[8i+4tj+6k]}{dt}

a=(4j)\ m/s^2

At t = 0, v=(8i+0+6k)\ m/s

v(t)=\sqrt{8^2+6^2} =10\ m/s

Hence, this is the required solution.

7 0
3 years ago
What is surface tension? How does surface tension result from intermolecular forces? How is it related to the strength of interm
Bond [772]

Answer:

Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible.

Surface tension is caused by effects of intermolecular forces at liquid interface.

Surface tension increases as intermolecular forces increases.

Explanation:

  • Surface tension is the tendency of liquid surfaces to shrink into the minimum surface area possible. It can also be seen as the energy required to increase the surface of a liquid by a unit amount.
  • Surface tension is caused by the mediating effects of intermolecular forces at the liquid interfaces. Example in water, surface tension is caused by the mediating effect of the force between hydrogen and oxygen molecules. Liquids tends to reduce their surface area because of inward attarction of the liquid molecules.
  • Surface tension increases as intermolecular forces increases. Also, surface tension decreases as intermolecular forces decreases.

3 0
3 years ago
Other questions:
  • A bus travels with an average velocity of 60 km per hour. how long does it take to cover a distance of 500km?
    15·1 answer
  • The length of a vector indicates the magnitude of the vector. true or false
    7·2 answers
  • An object has a positive velocity to the right and a negative acceleration. what is the motion of the object?
    11·1 answer
  • Why does a bowling ball move without acceleration when it rolls along a bowling alley?
    14·1 answer
  • Identify the techniques used to try to locate extra solar (exo) planets
    15·2 answers
  • . The international space station has a mass of 4.2 x 105 kg and it orbits the Earth at an average altitude of 400 km above the
    15·1 answer
  • How much force would cause a 120 kg object to decelerate from a rate of 16m/s to 13 m/s in 5 seconds
    7·1 answer
  • Hurry pls I need help
    8·1 answer
  • What theory did Dalton propose to explain why the elements
    9·1 answer
  • How does an executive order differ from a statue?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!