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3 years ago

Help!!! Pleaaaaaseee SOS!!

Physics

1 answer:

OLga [1]3 years ago

7 0

Answer:

D. When its weight is equal to the buoyant force exerted by the water.

Explanation:

A fluid exerts an upward force on a body submerged in it. This force that tends to lift the body is called floating force.

The flotation force that acts on a body submerged in a fluid is equal to the weight of the fluid displaced by the body and acts upward passing through the centroid of the displacemented volume.

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A two-lane highway is 8 meters wide and the asphalt is typically 4cm thick. What would the volume of the asphalt be for a road t

Radda [10]

Answer:

The volume of the highway's asphalt will be 6,400 cubic meters.

Explanation:

Volume is the overall magnitude of the three dimensions of a given object, that is, its width, length and depth. Thus, to obtain the volume of a certain object, its width must be multiplied by its length and this result in turn by its depth: W x L x D.

Thus, in this case, the highway has a width of 8 meters, a height of 4 cm and a depth of 20 km. As a first measure, all units of measurement must be expressed in a uniform way, for which the meter will be used in this case. Thus, the width of the highway will not vary, while its height will go from 4 cm to 0.04 meters (4/100), and its length will go from 20 km to 20,000 meters (20 x 1,000).

So, to obtain the volume of the asphalt on this highway, the following calculation must be performed:

8 x 0.04 x 20,000 = Volume

6,400 = Volume

Thus, the volume of the highway's asphalt will be 6,400 cubic meters.

8 0

3 years ago

Which list accurately identifies the hierarchy of space from largest to smallest? Solar system, galaxy, planet, universe Galaxy,

Oliga [24]

<h3><u>Answer;</u></h3>

Universe, galaxy, solar system, planet, moon

<h3><u>Explanation;</u></h3>

<u>A galaxy</u>, such as our Milky Way Galaxy, is a collection of solar systems orbiting around a central core.
<u>A solar system</u> consists of a star, normally the sun and all of its planets, asteroids, comets and other bodies.
<u>A planet</u> is a nearly spherical body which is in orbit around the Sun. Planets are larger than moons.
<u>Moons</u> are typically rocky bodies which are in orbit around planets.

8 0

3 years ago

Read 2 more answers

Hãy nêu sự tương tự giữa công của lực điện trong trường hợp này với công của trọng lực.

statuscvo [17]

Answer:

tốt ý bạn là gì?

Explanation:

6 0

3 years ago

The density of atmosphere (measured in kilograms/meter3) on a certain planet is found to decrease as altitude increases (as meas

alexgriva [62]

Answer:

B. inverse plot, 0.51 kilograms/meter3

Explanation:

First of all, we note that the relationship between the altitude and the atmospheric density is an inverse relationship. In fact, an inverse relationship is a relationship between the x-variable and the y-variable of the form

$y \propto \frac{1}{x}$

Therefore, as the x increases, the y decreases, and as the x decreases, they increases. This is exactly what occurs with the altitude and the atmospheric density in this plot: as the altitude increases, the density decreases, and vice-versa.

Moreover, we can infer the value of the atmospheric density at an altitude of 1,291 km. This point is located between point A (2550 km) and point B(1000 km), so the density must have a value between 0.30 kg/m^3 and 0.54 kg/m^3, so the correct choice is

B. inverse plot, 0.51 kilograms/meter3

5 0

3 years ago

Letícia leaves the grocery store and walks 150.0 m to the parking lot. Then, she turns 90° to the right and walks an additional

Alexxx [7]

Answer:

165.529454

Explanation:

According to the Pythagorean Theorem for calculating the lengths of a right angle triangle's sides, a^2 + b+2 = c^2, where c is the longest side (and the side opposing the right angle). So in your case it would be 150*150 + 70*70 = 27400. And √ 27400 is your answer.

7 0

3 years ago