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2 years ago

A house has a roof (colored gray) with the dimensions shown in the drawing. Determine the magnitude of the net force that the

Physics

1 answer:

Sav [38]2 years ago

5 0

The magnitude of the net force that the atmosphere applies to the roof when the outside pressure drops suddenly is 1.9 x 10⁵ N.

<h3>What is pressure?</h3>

The pressure is the amount of force applied per unit area.

Pressure p = Force/Area

Given is a house has a roof (colored gray) with the dimensions shown in the drawing. The outside pressure drops suddenly by 13.2 mm of mercury, before the pressure in the attic can adjust.

The pressure difference ΔP = 13.2 mm of Hg

The length of the roof l = 14.5m

the breadth of the roof h = 4.21m

The force exerted by pressure is

Force, F = P x A

= (13.2 mm of Hg) [(133 N/m²) /1 mm of Hg ](14.5 x 4.21)

= 107,170.6 N

Then the net vertical force

Fnet = 2F cos30

Fnet = 2 ( 107,170.6) cos30

Fnet = 185625 N

Fnet =1.9 x 10⁵ N

The direction of the force is downwards, since the horizontal components of the forces cancel each other.

Hence, magnitude of the net force is 1.9 x 10⁵ N

Learn more about pressure.

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Two 5000-kg passenger cars roll without friction (one at 1 m/s, the other at 2 m/s) toward one another on a level track. They co

balu736 [363]

The combined momentum of the passengers is 5000 kgm/s.

<h3>Combined momentum of the passenger</h3>

The combined momentum of the passengers is calculated as follows;

P = mv1 + mv2

where;

m is mass of the passengers
v1 is velocity of the first passenger
v2 is velocity of the second passenger

P = m(v1 + v2)

P = 5000(-1 + 2)

P = 5000 kgm/s

Thus, the combined momentum of the passengers is 5000 kgm/s.

Learn more about momentum here: brainly.com/question/7538238

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2 years ago

In the graph above, what is the instantaneous speed of the object after the first five seconds?

alexdok [17]

Answer:

D) 25 m/s

Explanation:

In order to solve this problem we must use the following kinematics equation.

$v_{f} =v_{i} +(a*t)\\$

where:

Vf = final speed [m/s]

Vi = initial speed = 0

a = acceleration = 5[m/s^2]

t = time = 5[s]

After 5 seconds the acceleration is equal to 5 [m/s^2]

Now replacing the values in the equation:

Vf = 0 + (5*5)

Vf = 25[m/s]

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3 years ago

How many atoms are present in 3 molecules of chromium

iren2701 [21]

Answer:

1,8066 x 1024 atoms

Explanation:

1 mole of chromium contains 6,022 x 1023 atoms

so

3 moles of chromium contains 3 times as many atoms

3 x 6,022 x 1023 = 1,8 066 x 1024

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3 years ago

There is more land in the Northern Hemisphere than in the Southern Hemisphere. How might this difference affect CO2, concentrati

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Oxygen is a product of photosynthesis, therefor lover levels of C02 would be in the area with more water due to more phtosynthetic processes happening converting it into oxygen.

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3 years ago

What never change despite what planet you go to

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Your mass will never change despite if you go to Jupiter, Uranus, Mars, Earth, or any planet.

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3 years ago