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SCORPION-xisa [38]
3 years ago
5

What percent of Earth’s surface is covered by land?

Physics
2 answers:
Olin [163]3 years ago
5 0
75 percent for sure!

sveticcg [70]3 years ago
4 0
25%, water takes up 75% Of the earth (im need to give 20 words to let me submit the answer)
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The greatest ocean depths on the earth are found in the marianas trench near the philippines. calculate the pressure due to the
tensa zangetsu [6.8K]
First, let us derive our working equation. We all know that pressure is the force exerted on an area of space. In equation, that would be: P = F/A. From Newton's Law of Second Motion, force is equal to the product of mass and gravity: F = mg. So, we can substitute F to the first equation so that it becomes, P = mg/A. Now, pressure can also be determined as the force exerted by a fluid on an area. This fluid can be measure in terms of volume. Relating volume and mass, we use the parameter of density: ρ = m/V. Simplifying further in terms of height, Volume is the product of the cross-sectional area and the height. So, V = A*h. The working equation will then be derived to be:

P = ρgh

This type of pressure is called the hydrostatic pressure, the pressure exerted by the fluid over a known height. Next, we find the literature data of the density of seawater. From studies, seawater has a density ranging from 1,020 to 1,030 kg/m³. Let's just use 1,020 kg/m³. Substituting the values and making sure that the units are consistent:

P = (1,020 kg/m³)(9.81 m/s²)(11 km)*(1,000 m/1km)
P = 110,068,200 Pa or 110.07 MPa
6 0
3 years ago
How do I find magnitude of acceleration?
Leno4ka [110]
Divide the change in speed by the time for the change.
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A spotlight on the ground shines on a wall 15 meters away. A man 1.8 meters tall walks away from the spotlight toward the buildi
Alex17521 [72]

Answer:

s=(15-x)m

Explanation:

Let the distance from spotlight to wall be 15m, and distance from the man to the building be x.

#Therefore the height of the shadow as a function of the above is s=(15-x )m

Hence, height of the shadow is expressed as s=(15-x)m

#See attached photo for illustration

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Answer:

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Joe follows the procedure below to make a compass.
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The answer would be C.

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