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
Juliette [100K]
3 years ago
8

An electrical short cuts off all power to a submersible diving vehicle when it is a distance of 28 m below the surface of the oc

ean. The crew must push out a hatch of area 0.70 m2 and weight 200 N on the bottom to escape.If the pressure inside is 1.0 atm, what downward force must the crew exert on the hatch to open it?
Physics
1 answer:
skelet666 [1.2K]3 years ago
6 0

Answer:

F=126339.5N

Explanation:

to find the necessary force to escape we must make a free-body diagram on the hatch, taking into account that we will match the forces that go down with those that go up, taking into account the above we propose the following equation,

Fw=W+Fi+F

where

Fw=   force or weight produced by the water column above the submarine.

to fint Fw we can use the following ecuation

Fw=h. γ. A

h=distance

γ= specific weight for seawater = 10074N / m ^ 3

A=Area

Fw=28x10074x0.7=197467N

w is the weight of the hatch = 200N

Fi is the internal force of the submarine produced by the pressure = 1atm = 101325Pa for this we can use the following formula

Fi=PA=101325x0.7=70927.5N

finally the force that is needed to open the hatch is given by the initial equation

Fw=W+Fi+F

F=Fw-W+Fi

F=197467N-200N-70927.5N

F=126339.5N

You might be interested in
How do u calculate momentum
Helga [31]

Answer:

Explanation:

To calculate the momentum of a moving object multiply the mass of the object times its velocity. The symbol for momentum is a small p. So, the momentum of the object is calculated to be 8.0 kg-m/s. Note the unit for momentum.

5 0
4 years ago
What name is given to a fuel made from living organisms or their waste??
Anni [7]
The name given to a fuel made from living organisms or their waste is a fossil fuel. Fossil fuels, in the form of oil and coal, have been utilised by mankind for approximately 100 years in order to produce energy. Today, there is a shift to more renewable energy sources such as solar, wind or wave power. 
3 0
3 years ago
A 0.005 kg bullet is travelling horizontally at a velocity of 250 m/s when it strikes a wooden block of mass 12 kg on a table at
Verdich [7]
Use the conservation of momentum formula: m1v1 + m2v2 = v(m1 + m2)

(0.005kg)(250m/s) + (12kg)(0m/s) = v(0.005kg + 12kg)

v = ((0.005kg)(250m/s)) / (0.005kg + 12kg)

v = 0.104 m/s
6 0
4 years ago
An advanced computer sends information to its various parts via infrared light pulses traveling through silicon fibers (n = 3.50
sasho [114]

Answer:

d = 6.43 cm

Explanation:

Given:

- Speed resistance coefficient in silicon n = 3.50

- Memory takes processing time t_p = 0.50 ns

- Information is to be obtained within T = 2.0 ns

Find:

- What is the maximum distance the memory unit can be from the central processing unit?

Solution:

- The amount of time taken for information pulse to travel to memory unit:

                            t_m = T - t_p

                            t_m = 2.0 - 0.5 = 1.5 ns

- We will use a basic relationship for distance traveled with respect to speed of light and time:

                           d = V*t_m

- Where speed of light in silicon medium is given by:

                           V = c / n

- Hence,              d = c*t_m / n

-Evaluate:           d = 3*10^8*1.5*10^-9 / 3.50

                           d = 0.129 m 12.9 cm

- The above is the distance for pulse going to and fro the memory and central unit. So the distance between the two is actually d / 2 = 6.43 cm

8 0
3 years ago
A particle with charge -5 C initially moves at v = (1.00 i^ + 7.00 j^ ) m/s. If it encounters a magnetic field B =80 Tkˆ, find t
algol [13]

Answer:

The magnetic force is  \= F  =  400\r j + 2800\r i

Explanation:

From the question we are  told that

  The  charge is  q =  -5C

  The  velocity is  v  =  (1.00\ \r i +  7.00 \ \r j )\ m/s

   The  magnetic field is  B =  80 \r k \ \ T

Generally the magnetic force is mathematically represented as

        \=  F =  q  \= v  \  \  X \ \ \= B

=>     \=  F = -5  (1.0 \r i  + 7.0 \r j  ) \  \  X \ \  80 \r k

=>    \= F  =  -5.0 \r i +  35\r j  \ \ \ X \ \ 80\r k

=>  \= F  =  400\r j + 2800\r i    N/B - Applied cross - product of unit vector

8 0
4 years ago
Other questions:
  • if a moose were chasing you through the woods its enormous mass would be very threatening but if you zigzagged then it great mas
    11·1 answer
  • Which of the following is the general format for a double displacement reaction?
    6·2 answers
  • How do you find density of a regular solid?
    10·1 answer
  • true or false a fuel resource can be replaced in an reasonably short time called a nonrenewable resource.
    10·1 answer
  • 0.01 s<br> It asks me about the scientific notation
    7·1 answer
  • A car traveling in a straight line has a velocity of 6m/s at some instant. After 6.32s its velocity is 13.2m/s . What is the ave
    12·1 answer
  • 1. A 0.250 kg baseball sits on the ledge of a window in Treadwell hall. If the ball has 18.5
    10·1 answer
  • a stone is thrown vertically upwards with an initial velocity of 20 metre per second find the maximum height it reaches and the
    14·1 answer
  • Describe how noise-cancelling headphones modify the sound waves around the user. Your answer should be three to four sentences i
    13·1 answer
  • The crystal in a digital watch oscillates at a rate of 215 Hz. If the maximum displacement of one crystal face (measured from on
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!