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GalinKa [24]
3 years ago
6

A 40 kg box has a surface area of 0.2 m2, determine its pressure.

Physics
1 answer:
vesna_86 [32]3 years ago
6 0

Answer:

P = 1960 Pa

Explanation:

The pressure is computed as the force acting upon a surface divided by the area of the surface

P=\frac{F}{A}

The box has 40 kg, it presses on its own surface when placed over a table or any flat area. The acting force is its weight.

F = W = m.g = 40 kg \ 9.8m/sec^2 = 392 N

The pressure is:

P=\frac{392N}{0.2m^2}=1960 \ Pa

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A ship sets out to sail to a point 154 km due north. An unexpected storm blows the ship to a point 72 km due east of its startin
Norma-Jean [14]

Answer:

<h2>170km</h2>

Explanation:

If a ship sets out to sail to a point 154 km due north and an unexpected storm blows the ship to a point 72 km due east of its starting point, then the ships distance from the original destination can be gotten by finding the displacement of the ship and this can be gotten by using pythagoras theorem.

Let D be the unknown displacement

According to the theorem;

D² = 154² + 72²

D² = 23716 + 5184

D² = 28900

D = √28900

D = 170km

<em>This means that the ship must now sail a distance of 170km for it to reach its original destination.</em>

8 0
3 years ago
A meteor is
Leya [2.2K]

Answer:

A meteor is  B) an icy body with a long tail extending from it.

Explanation:

Meteors are very small dust particles that, when penetrating into the Earth's atmosphere, burn quickly by rubbing with the gases of the same. Some meteors, those with larger dimensions and appreciable weights, are brighter and can describe longer trajectories, showing longer.

In other words, the meteoroids, celestial bodies can vary in size between 100 micrometers up to 50 meters, they collide with the atmosphere of our planet and if the particles are of a small size, upon impact they enter combustion creating a flash, is what we know as meteor or shooting star. Therefore, the meteor is a luminous phenomenon that leaves behind a persistent trail.

So, <u><em>a meteor is  B) an icy body with a long tail extending from it.</em></u>

4 0
3 years ago
A mail carrier leaves the post office and drives 2.00 km to the north. He then drives in a direction 60.0° south of east for 7.00
den301095 [7]

Answer:

\theta=7^o

Explanation:

<u>Displacement</u>

It is a vector that points to the final point where an object traveled from its starting point. If the object traveled to several points, then the individual displacements must be added as vectors.

The mail carrier leaves the post office and drives 2 km due north. The first displacement vector is

\vec r_1=\ km

Then the carrier drives 7 km in 60° south of east. The displacement has two components in the x and y axis given by

\vec r_2=\ km=\ km

Finally, he drives 9.5 km 35° north of east.

\vec r_3=\ km=\ km

The total displacement is

\vec r_t=\ km+\ km+\ km

\vec r_t=\ km

The direction can be calculated with

\displaystyle tan\theta=\frac{1.39}{11.28}=0.1232

\boxed{\theta=7^o}

7 0
3 years ago
Which describes why nonrenewable energy resources are used more frequently than renewable ones?
Helga [31]

The correct answer is C They are inexpensive to use. Trust me I just took the test.

Mark me Brainiest please.

6 0
3 years ago
Read 2 more answers
I need help with this question?
Dima020 [189]

Answer:

You got it right, didn't you?

c) vector C

Explanation:

opposite to vector V

8 0
3 years ago
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