For a substance to change from a liquid to a solid, what must happen to its
particles?

Answer:

(d) zero

Explanation:

Net acceleration = (a - g)

a is downward so it is positive

F(net) = ma(net)

F = 100 x (9.8 - 9.8)

F = 0

The correct option is (d).

Answer:??????

Explanation:

Answer:

The valency of atoms can be determined by looking at the groups of the periodic table. Hope this helps!

Explanation:

Answer:

three

Explanation:

It just is

Answer:

6 i think

Explanation:

Answer:

D, parallel decreases and series increases.

Explanation:

Answer:

Like all of the planets, Saturn is named after a character in Roman mythology. Saturn is named after the god Saturnus, the god of agriculture and harvest. Saturn is equivalent to the ancient Greek god Kronos.

Answer:

can make for colder winters by keeping the sun out more

Explanation:

1.Most of the particles spewed from volcanoes cool the planet by shading incoming solar radiation

2.lower temperatures in the troposphere & change atmospheric circulation patterns

scieducaredu earthdatanasagov

Answer:

action and reaction forces

Explanation:

These two forces are called action and reaction forces and are the subject of Newton's third law of motion. Formally stated, Newton's third law is: For every action, there is an equal and opposite reaction. The statement means that in every interaction, there is a pair of forces acting on the two interacting objects.

Answer:

Earthing

Explanation:

Answer:

I Believe The Answer Is B

Explanation:

Answer: A. a basketball being shot toward the basket

Explanation: The definition of projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. So, the basketball is the object being thrown and the person throwing the ball is aiming it to go into the basket making that the path of trajectory. Hope that makes sense and helps!

Answer:

B. The kinetic energy of the ball change into potential energy as the ball rises.

Explanation:

This can seem a little bit confusing at first, but once you understand Kinetic Energy, you'll get it right away. Kinetic Energy is energy an object has when it is moving. So for example, you have kinetic energy when you run, a pen has kinetic energy when you drop it in class, and the ball has kinetic energy as it rises.

However, because of outside forces, objects with kinetic energy will eventually lose it. These forces can be anything from friction as an object slides across a surface, to the negative acceleration due to gravity.

In this question, the force working against the motion of the ball is gravity. As you know, when you throw something up, it has to come down, because of gravity. As the ball goes up, it has enough kinetic energy that it continues its upward motion, however it slowly looses that energy, causing it to slow to a stop before falling back to the ground.

On the way up, the energy of the ball changes from this kinetic (moving energy) to what we call potential energy. Potential energy is exactly what is sounds like, it is the potential for something to begin moving. So, as the ball goes higher, it has a lower chance of continuing to go up (meaning it's loosing it's kinetic energy) and higher chance of falling back down (meaning it's gaining potential energy).

Hope this helps.

Answer:when a body possesses more than one simple motion, it is called a multiple motion.

Explanation:you are traveling by a train. Your wrist watch is also sharing the linear motion of the train. But the hands of the watch are also undergoing rotational motion. Thus they have 2 kinds of motion, I, e, Multiple motion.so also the blades of the fan in the train have multiple motion (a linear motion of the train and the rotation).

Answer:

e) 200 J

Explanation:

Work done by a force on an object is the energy required for a force to move that object over a distance. It can be calculated using the formula:

W = F × d

Where; W = work done

F = force applied

d = distance

According to this question, F = 10N, d = 20m

W = 10 × 20

W = 200 J or N/m

Given parameters:

Duration of crash = 9min

Velocity before crash = 2000 yards per second

Unknown:

Acceleration of the plane = ?

Solution:

Acceleration is the change of velocity with time.

  Acceleration  = [tex]\frac{V - U}{t}[/tex]

where v is the final velocity

          u is the initial velocity

          t is the time taken

We need to convert the time into seconds from min;

                      60s  = 1 min

                                So, 9min = 60 x 9 = 540s

So input the parameters and solve;

                  Acceleration = [tex]\frac{2000 - 0 }{540}[/tex]  = 3.7yards/s²

The acceleration of the plane is 3.7yards/s²

If a space rover has a mass of 3900 kg on Earth, then its mass when it lands on Mars will be the same i.e. 3900 kg.

Mass is the amount of matter present in the object.

The mass of the object is always constant, anywhere it is on the Earth or Moon or any other planet.

Thus, If a space rover has a mass of 3900 kg on Earth, the mass on Mars when it lands will be 3900kg.

Learn more about mass.

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Answer:

s ≈ 35.8 m

Explanation:

Let's apply the uniform acceleration equation to find the vertical height travelled after 2.7 seconds.

[tex]s = ut + \frac{1}{2}at^2[/tex]

s = distance travelled

u = initial vertical velocity

t = time taken

a = gravitational acceleration

The gun is fired horizontally, hence there is no initial vertical velocity.

[tex]s = 0(2.7) + \frac{1}{2}(9.81)(2.7)^2[/tex]

[tex]s = 35.75745 m[/tex]

s ≈ 35.8 m

Answer:

Relative density is a ratio of the density of a certain material to the density of a reference material. Relative density has no unit, because the units of the material in question cancel out with the units of the reference material. For example, say a cooking oil’s density is 0.9 g/cm^3.

Explanation:

Answer:

88 days

Explanation:

Mercury take 88 days to revolve around the sun.

Answer:

75n

Explanation:

i hope this helps

Answer:Carbon

Explanation:

Carbon is CO2

Answer:

I hope this answer is correct

Explanation:

Difference Between Gravitation and Gravity

Gravitation is referred to the force acting between two bodies which can be represented as the F=(GM1M2)/R2 which means gravitation force is proportional to the product of the masses of the object 1 and object 2 and is inversely proportional to the square of the distance between them. The gravitational force between earth and any object is known as gravity.

Difference Between Gravitation and Gravity

Gravitation Gravity

It is a universal force It is not a universal force

It is a weak force It is a strong force

The force is F=(GM1M2)/R2 (G= gravitational constant) The force is F=mg (g=acceleration due to gravity)

The direction of gravitational force lies in the radial direction from the masses The direction of the force of gravity is along the line joining the earth’s center and the center of the body. Its direction is towards the center of the earth.

The force can be 0 when the separation between bodies is infinity The force of gravity can be 0 at the center of the earth

It requires two masses It requires only one mass

These were some difference between Gravitation and Gravity. If you wish to find out more, download BYJU’S The Learning App.

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Gravity Acceleration Due to Gravity

Answer:

level HAHAHAHAHAH chariss

Answer:

When the Sun, the Earth, and the Moon are all aligned in space, a lunar eclipse occurs. The Moon reflects the Sun's light onto the Earth. The Earth gets in the way of the Sun in this case, keeping sunlight from reaching the moon. A lunar eclipse happens if this alignment is ideal.

Explanation:

Rephrased it so u dont have to<3 Hope this helped!

Answer:

Enlarged brain ventricles are presumed to signify

____a deterioration of brain tissue____.

Explanation:

got it right

Enlarged brain ventricles are presumed to signify a deterioration of brain tissue. The correct option is D.

One or more of the ventricles swell as CSF builds up when an injury or sickness disrupts CSF circulation. Because the adult skull is stiff and cannot expand, the pressure inside the brain may significantly rise.

A chronic illness known as hydrocephalus causes fluid to accumulate in the ventricles deep inside the brain. It normally cannot be cured, but it can be controlled.

As a neurodegenerative disease that causes cognitive impairment and behavioral abnormalities, Alzheimer's disease is a progressive illness that impairs memory and other critical mental functions.

Therefore, the correct option is D. A deterioration of brain tissue.

To learn more about the deterioration of the brain, refer to the link:

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Answer:

Put simply, it's the physics that explains how everything works: the best description we have of the nature of the particles that make up matter and the forces with which they interact. Quantum physics underlies how atoms work, and so why chemistry and biology work as they do.

Answer:

qorks with atomic booms and nuclearbombs on how atoms react when charged

F = ma

F = 3*5

F = 15 N

Hope it helps :)

Answer:

F=15

Explanation:

cells are the basic unit of all living things

Answer:

Cell

Explanation:

Because I took this class last year and also learned it in biology

Answer:

Matching principle

Explanation:

Matching principle is an accounting principle for recording revenues and expenses. It requires that a business records expenses alongside revenues earned.