What state of matter did the earth need to be in order for planetary differentiation to occur?
Answer: Gas, liquid, or solid?

Answer:

B

Explanation:

From the question above, you can see in the picture, the first,second ,third models have respectively 4 e in second circle (Carbon), 5 e in second circle(Nitrogen) , 6e in second circle(Oxygen) . So, to maintain the serial, the next model must have 7 e in second circle of the atom which is option B : Fluorine

a) An inflated balloon was pressed against a wall after it has been rubbed with a piece of synthetic cloth. It was found that the balloon sticks to the wall. This is because a positive and negative electric charge is produced, therefore the balloon sticks to the wall.

b) When an object is thrown up, it comes back to ground because of gravitational attraction force of earth.

c) Mountaineers suffer nose bleeding at higher altitudes because the oxygen level decreases with increase in altitude, which the body cannot adjust.

d) Foundations of high rise buildings are kept wide because more is the area of contact, less is the pressure efforts. So, foundations are wide so as to decrease the possibility of the building from falling down.

e) Deep sea divers or high altitude fliers wear special suits so as prevent their body from being crushed by the water pressure. Since water pressure is maximum at deep seas and oceans, therefore, more is the risk of being injured.

f) Walls of a dam are thickened near the base so that the dam can handle the kinetic energy pressure and prevent itself from breaking down, which if not, can lead to flooding.

HOPE IT HELPS...

Answer:

It increases in depth, indicates the heat flowing from earths warm interior to its surface

A  randomized experiment is regarded as being very much reliable in science.

A  randomized experiment is regarded as being very much reliable in science. In this type of experiment, the subjects are randomly assigned to a treatment group and a control group.

In this experiment, there are two kinds of treatments that the biologist intends to use and they are;

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Missing parts;

A biologist is interested in studying the effect of growth-enhancing nutrients and different salinity (salt) levels in water on the growth of shrimp. The biologist has ordered a large shipment of young tiger shrimps from a supply house to use for the study. The experiment is to be conducted in a lab where there are 12 tanks (with equal amount of shrimp in each) in a controlled environment. The biologist is planning to use 3 different growth-enhancing nutrients (A, B and C) and two different salinity levels (high and low).  List the treatments that the biologist plans to use in this experiment

Answer:

0.08

Explanation:

this problem assume that both of whale and submarine are in rest position or in constant linier motion in same direction and same speed.

The sound will travel from Submarine to the whale and back again to submarine. so the time will be like this

t = 2d/v

t = 2*58.8/1520

t = 117.6/1520

t = 0.077368 s

t ≈ 0.08 s (less then 1 s)

Answer:

0.0774s

Explanation:

The formula to find the time of an echo is time = (2)(distance) / (velocity)

So plug in the numbers to the formula

(2)(58.8) / (1520)

= 0.0774s

Answer:

Depends: Is it tennis or volleyball?

Explanation:

If it's volleyball, it's C, the other teams point.

If it's tennis, it's A, you get a re-do.

That depends on the values of the resistors.

If the same two resistors are used in both cases, then the total resistance is more in series and less in parallel.

Here's a catchy little factoid for ya:

-- In series, the total resistance is more than the biggest single one.

-- In parallel, the total resistance is less than the smallest single one.

The function of sleep theory supported by the illustration is sleep conserves and protects.

From the first sentence, bats sleep a lot because they face little danger from predators and as such, they have a high-calorie diet of insects.

From the second sentence, cows sleep less, because they face more danger from predators and as such, they have a low-calorie diet of insects.

We can conclude that sleep helps to keep animal safe. Therefore, the correct option will be, "Sleep conserves and protects".

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Answer:

The correct answer to the following question will be "An ecosystem".

Explanation:

So that the above seems to be the right answer.

Answer:

fire

Explanation:

burning the the oil

here, we have given kinetic energy = 3.2 J

mass= 428.5 kg = 0.4285 gm

so now we know,

K.E = \(1/2mv^{2}\)

v= \(\sqrt{2K/m}\)

v= \(\sqrt{2*3.2/0.4285}\)

v=\(\sqrt{14.94}\)

v=3.86 m/s.

at 3.86m/s object will be moving to possess a kinetic energy of 3.2 j.

kinetic energy.

v= velocity

m= mass

K.E = kinetic energy

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Answer:

the answer is B but I'm not completely sure

The reason for this observation is  that the shed is not made of iron or steel.

The special magnetic property of iron is called ferromagnetism. As a result of this special magnetic property, iron can be attracted easily by a magnet. Steel is made from iron so it is also highly magnetic.

In the question, a magnet placed against the wall of a metal shed falls to the ground, where it attracts a nail. The reason for this is that the shed is not made of iron or steel.

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We can see here that when a high operating kilovoltage is used, a. Low subject contrast; many shades of gray.

A dental image refers to a visual representation or picture of the teeth, gums, and surrounding structures in the oral cavity.

Dental images are typically captured using various imaging techniques and equipment to assist in the diagnosis, treatment planning, and monitoring of dental conditions.

A high kilovoltage setting produces an image with decreased or low contrast; the radiograph exhibits many shades of gray. This is because the higher energy x-rays are better able to penetrate tissue, resulting in less variation in the absorption of x-rays by different tissues.

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Answer:

well they make the siren go beacaus eyou are doing somthing wrong so what were you thinking

Explanation:

Answer:

A big wheel with triple the circumference of a small wheel will rotate with triple the force.

Explanation:

Answer:

The number of moles of the air is 4.464 x 10⁻⁴ mole

The number of molecules is  2.688 x 10²⁰ molecules

Explanation:

Given;

pressure of the air, P = 1 atm

volume of the air, V = 1 m³

temperature of the air, T = 0° C = 273 K

The number of moles of the air is calculated as;

PV = nRT

\(n = \frac{PV}{RT}\)

where;

n is the number of moles

R is ideal gas constant = 8.2057m³atm/mol.k

\(n = \frac{1atm \ \times \ 1m^3}{(8.2057 \ m^3 atm/mol.K)(273 \ K)} = 4.464 \ \times 10^{-4} \ mol.\)

The number of molecules is calculated as follows;

1 mole  ---------------------> 6.022 x 10²³ molecules

4.464 x 10⁻⁴ mole ----------> ?

= (4.464 x 10⁻⁴) (6.022 x 10²³ molecules)

= 2.688 x 10²⁰ molecules of air.

Answer:

7 Seconds

Explanation:

P=W/t

t=W/P

t=875,000/125,000

t=7 seconds

Answer:

The acorn hit the ground 3 m far away from me.

Explanation:

Here ,

time taken by the  acorn to fall be 't',

Height of the tree is 20m ,

so \(S= 20m\)

Acceleration due to gravity is -\(a=9.8\frac{m}{s^2}\approx 10 \frac{m}{s^2}\)

Initial velocity is 0 ,so  u=0

According to the second equation of motion ,

\(s=ut+\frac{1}{2} at^2\)

\(20=\frac{1}{2} \times10\times t^2\)

\(t^2=4\)    

\(t=2\)sec.

Distance travelled by you in 2 sec

\(\text{Distance} = \text{Speed} \times \text{Time}\)

Put speed=  1.5m/s² and time = 2sec

\(Distance= 1.5 \times 2\\Distance=3m\)

 Hence , the acorn hit the ground 3m far away from me.            

Arbitrary variable X: The individual car's speed through the intersection, expressed in mph. X is evenly distributed between the range of 11 and 35 mph, inclusive, according to the formula X = Uniform speed (11,35).

A spread metric for a random variable distribution that identifies how far the values deviate from the expected value. The standard deviation of the random variable X is frequently written as or X.

(f) Standard deviation σ:

σ = sqrt[(35 - 11)² / 12] ≈ 6.18

(g) Chance that a car will travel at most 26 mph:

P(X ≤ 26) = (26 - 11) / (35 - 11) = 15 / 24 = 5 / 8

(h) The likelihood that a car will travel between 18 and 22 miles per hour:

P(18 ≤ X ≤ 22) = (22 - 18) / (35 - 11) = 4 / 24 = 1 / 6

Probability questions:

P(19 < X < 56) = 1, since X cannot be greater than 35 mph.

P(X < 19 | X < 56) = P(X < 19) = (19 - 11) / (35 - 11) = 8 / 24 = 1 / 3

P(X = 19 or X = 56) = 0, since X is a continuous random variable.

P(X < 19 or X > 56) = P(X < 19) + P(X > 35) = (19 - 11) / (35 - 11) + (35 - 35) / (35 - 11) = 8 / 24 + 0 = 1 / 3

P(19 ≤ X ≤ 56) = P(X ≤ 56) - P(X < 19) = (35 - 11) / (35 - 11) - (19 - 11) / (35 - 11) = 24/24 - 8/24 = 2 / 3

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Answer:

gagaggagagagagooo

Explanation:

gagagagagagagagaoooo

Answer:

Explanation:

The puck slides on the ice . Coefficient of sliding friction μ = .026

Limiting frictional force = μ R

R is reaction force of the surface .

R = mg

Friction force = μ mg

deceleration = μ mg / m

= μ g

= .026 x 9.8 = .2548

= 0.26 m /s².

Answer:

....

Explanation:

Answer:

What do you mean.

Explanation:

An object is dropped from a roof of a building of height h, the height of the building is 145.5 m.

It is given that

\(y_{last}\)= h/3

\(t_{last}\)= 1s

g= 9.8 m\(s^{-2}\)

In first stage,

t1= (t-1)s  y1 = 2h/3

vi1 = 0

according to the kinematic equation,

y1= v1t1 + 1/2 g\(t1^{2}\)

then substituting all the values, we have

2h/3 = 1/2(9.8)\((t-1)^{2}\)

⇒ h = 7.35\((t-1)^{2}\) → 1

Then the final velocity can be calculated by

vf1=\(vi^{2}\)+ g(t - 1)

vf1= 9.8(t - 1)

In the second stage,

t2= 1s

y2= h/3

g=9.5 m\(s^{-2}\)

vi2 = vf1 = 9.8(t - 1)

Acoording to kinematic equation,

y2 = vi2 t2 + 0.5g\(t1^{2}\)

substituting the values,

h/3 = 9.8(t - 1) + 4.9

⇒ h= 29.4(t - 1) + 14.7 → 2

From equation 1 and 2, we get,

7.35\((t-1)^{2}\) = 29.4(t - 1) + 14.7

if we assume (t-1) = R, we get

7.35\(R^{2}\) - 29.4R - 14.7 =0

⇒R = 4.45

t = R+1 = 5.45s

substituting the value of t in equation 1, we have

h= 7.35\((4.45)^{2}\) = 145.5m

Thus, the height of the building is 145.5m.

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Sound moves faster in the denser regions of the ocean than in the less dense regions of the ocean.

We know that sound is a wave whose medium of propagation isthrough matter. Hence, sound move faster in a dense object than in a less dense object.

As such, sound moves faster in the denser regions of the ocean than in the less dense regions of the ocean.

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Answer:

v = -5 m/s

Explanation:

It is given that,

The initial velocity of the ball, u = 25 m/s

We need to find its velocity after 2 seconds in the air.

Let v is the velocity of the ball after 2 seconds. Using equation of motion to find it.

v = u + at

Here, a = -g

v = u -gt

Putting all the values,

v = 25 - (10)(3)

= 25-30

= -5 m/s

So, the velocity of the ball after 3 seconds is 5 m/s and it is in downward direction.

The tension in the guy wire is 900 N, and the components of the force exerted on the pole by the wall are 300 N (upwards) vertically and 900 N (towards the wall) horizontally.

To solve this problem, let's consider the forces acting on the pole.

1. Weight of the pole: The weight of the pole acts downward at its center of mass. Its magnitude is given as 300 N.

2. Load force: The load of 600 N hangs from the upper end of the pole.

3. Tension in the guy wire: The tension in the guy wire pulls the pole upwards and towards the wall.

4. Forces exerted by the wall: The wall exerts two perpendicular forces on the pole - a vertical force and a horizontal force.

Let's calculate the tension in the guy wire first.

To maintain equilibrium, the sum of the forces acting in the vertical direction must be zero.

Tension in the guy wire - Weight of the pole - Load force = 0

Tension in the guy wire = Weight of the pole + Load force

Tension in the guy wire = 300 N + 600 N

Tension in the guy wire = 900 N

Therefore, the tension in the guy wire is 900 N.

Now, let's find the components of the force exerted by the wall.

Since the pole is held at an angle of 30 degrees above the horizontal, the forces exerted by the wall can be resolved into two components:

1. Vertical component: This component counteracts the weight of the pole.

Vertical force exerted by the wall = Weight of the pole = 300 N

2. Horizontal component: This component counteracts the tension in the guy wire.

Horizontal force exerted by the wall = Tension in the guy wire = 900 N

Therefore, the components of the force exerted on the pole by the wall are:

Vertical component: 300 N (upwards)

Horizontal component: 900 N (towards the wall)

In summary:

The tension in the guy wire is 900 N, and the components of the force exerted on the pole by the wall are 300 N (upwards) vertically and 900 N (towards the wall) horizontally.

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The form of heat transfer that doesn't depend on a medium is (B) radiation.

Radiation is the form of heat transfer that doesn't require a medium. It involves the emission of electromagnetic waves, such as infrared radiation, from a warm object to its surroundings.

Unlike conduction and convection, which require a medium (such as a solid, liquid, or gas) to transfer heat, radiation can occur in a vacuum or through empty space. This is because electromagnetic waves can travel through the vacuum without the need for a physical medium.

Conduction involves the transfer of heat through direct contact between objects or particles within a substance, while convection involves the transfer of heat through the movement of a fluid (liquid or gas).

Both conduction and convection require a medium for heat transfer, unlike radiation, which can occur independently of a medium.

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Neptune's largest moon Triton's retrograde orbit defies expectations and is a reflection of the complexities of the universe. The direction of Triton's orbit may have a significant impact on Neptune's magnetic field, making it a fascinating celestial object that warrants further exploration and analysis.

Neptune's largest moon, Triton orbits in a direction opposite to the direction in which Neptune rotates. What can we conclude from this?

It is assumed that Triton was previously an independent celestial object that was later captured by Neptune's gravitational pull.

It is interesting to observe that Triton orbits Neptune in a retrograde direction, the opposite of Neptune's rotation, and one of the few moons in the solar system to do so.

As a result of the force that the gas giant's gravity exerts on Triton, it has been tugged closer and closer to Neptune throughout time. Since Neptune rotates in a counter-clockwise direction,

Triton orbits the planet in the opposite direction. Neptune and Triton are distinct, and their individual characteristics serve as an intriguing example of the complexity of the solar system.

First and foremost, we can conclude that Neptune is capable of capturing other celestial bodies that get too close to its gravitational pull.

Triton's retrograde orbit is also a reminder that the solar system is far more complex than we thought.

When it comes to celestial bodies, orbits can vary and defy expectations, indicating that much more research and exploration is required to grasp the mysteries of the universe.

In addition, Triton's orbital path may have an impact on Neptune's magnetic field, according to scientists. It's possible that the gravitational interactions between Triton and Neptune, as well as the charged particles that circulate around them, have created a dynamic process that results in the formation of auroras.

Because Triton's orbit is eccentric, or elliptical, its distance from Neptune varies widely, which could explain why its influence on the planet's magnetosphere differs over time. This is still a field of active research and scientists are looking forward to unveiling more about this.

In conclusion, Neptune's largest moon Triton's retrograde orbit defies expectations and is a reflection of the complexities of the universe. The direction of Triton's orbit may have a significant impact on Neptune's magnetic field, making it a fascinating celestial object that warrants further exploration and analysis.

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