An object velocity can be described by I s acceleration and direction

Answer:

compound

Explanation:

"Marble is typically more than 95% calcium carbonate, perhaps even 99% calcium carbonate, and calcium carbonate is a compound. Marble has a good claim to be recognized as a compound."

Answer: Element

Explanation: No, marble is not a compound, because for a rock to be called marble other characteristics, beyond the chemical composition, have to have specific values. But marble is made up of only one compound, calcium carbonate. Colored marbles do contain small amounts of other chemicals.

An intrinsic property is independent of how much of a material is present and is independent of the form of the material, one large piece or a collection of small particles. Intrinsic properties are dependent mainly on the fundamental chemical composition and structure of the material.

Answer:

it depends on the medium and the temperature

Explanation:

The speed of the sound wave has been majorly dependent on temperature and medium of propagation.

Speed can be defined as the distance traveled by the wave in a unit of time. The speed is a scalar quantity and has been independent of the direction.

The speed has been dependent on the medium of propagation of the wave, The transmission has been the transfer of sound energy, the medium with compact structure has been consisted of the higher speed with the medium having distinct particles.

The speed is also dependent on the temperature as the higher temperature has fast vibrating molecules and higher speed, while lower temperature has slow-moving molecules and lesser speed.

The speed of the sound wave has been majorly dependent on temperature and medium of propagation.

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Answer:

there are 0.074 moles in 2.3 grams of phosphorus

Answer: The options are not given, here are the options.

A)There is an indirect relationship: as thermal energy increases, there is more particle movement.

B) There is an indirect relationship: as thermal energy increases, there is less particle movement.

c) There is a direct relationship: as thermal energy increases, there is more particle movement.*****

d) There is a direct relationship: as thermal energy increases, there is less particle movement.

The correct option is C.

There is a direct relationship: as thermal energy increases, there is more particle movement.*****

Explanation:

There is a direct relationship: as thermal energy increases, there is more particle movement because when there is increase in thermal energy or heat in a substance, the particles start to vibrate and move faster as a result of the particles gaining kinetic energy which is as a result of increased collision and diffussion rates.

As they vibrate the space between the particles increases which result in increase in motion or movement of the particle

Answer:

In an experiment in which blood pressure medication is tested, one group is given the blood pressure medication while the control group is given a placebo pill.

In a test of anxiety treatment, one group attends individual therapy sessions and receives a new medication. The control group receives only an inert pill.

A treatment for drug addiction is being tested. A group of meth addicts are given the treatment while the control group is given the placebo.

Researchers are testing the effectiveness of a drug intended to reduce symptoms of Crohn's disease. Many sufferers of Crohn's disease are recruited for the effort and the group that receives the placebo is the control group.

A treatment for hair loss in men is being tested. Men of the same age range are gathered. One group receives an application with the active ingredient while the control group receives an application that appears the same but does not have the active ingredient in it.

hope this helped you

Explanation:

I think it really depends on what you are using them for but I would say in general that using marbles means you can't investigate the subatomic particles (electron orbitals, nucleus etc.) and also you can't exactly model atomic binding with marbles as they don't really stick together.

I would say those are the two main things but once again really depends on what they're being used for.

Hope this helped!

Answer:

75.4 gram /3.45 gram/cubic centimeter  = 21.855072463768 cubic centimeter

Explanation:

V =   m /ρ

where V = Volume, p = Density  and m = Mass

Answer:

This question appears incomplete but generally the answer is NO

Explanation:

Observation of the contents of an unlabeled jar depends solely on some of the physical properties of the content which is not good enough when identifying the contents of an unlabeled jar. This is because several substances have the same physical properties. For example, water and several acidic solutions appear the same in terms of colour and viscosity. Hence, a jar of water and a jar of hydrochloric acid cannot be differentiated by mere observation but with the use of litmus paper.

And a solution of hydrochloric acid and sulphuric acid cannot be differentiated by observation alone except a jar ammonia is brought close to the two jars (the one with hydrochloric acid will form a white fume with ammonia); hence relying on the chemical properties of both substances.

NOTE: Observation is done through sight, smell, feel, sound and taste without relying on another procedure/analysis to determine them.

Answer:

B: It depends on how a substance was formed.

Explanation:

took the test

Intensive property is the same for every sample of a single substance.

INTENSIVE AND EXTENSIVE PROPERTIES:

Hence, intensive property is the same for every sample of a single substance.

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Answer:

matter is anything with mass and volume

Answer:

1 and 4 took the test

Explanation:

Answer:

Life science is alternatively known as biology, and physical science is subdivided into branches: physics, chemistry, astronomy and Earth science. These branches of natural science may be further divided into more specialized branches. But that is more writting to explain

Explanation:

Answer: biology, climate Science, astronomy etc.

Explanation:

The scientific disciplines that are related to chemistry mentioned or alluded to in the article are:

• Biology: Biology is a natural science which studies living organisms, and this include their molecular interactions, evolution, physical structure, and chemical processes.

• Astronomy: Astronomy is the study of space, and the universe. In astronomy, the stars, planets, and galaxies are all studied.

• Climate science: Climate science is also referred to as climatology and it's the scientific study of climate.

Answer:

1. Atmospheric science, environmental science, climate science, biology, astronomy, human physiology and medicine

Explanation:

Because I said so

Answer:

rising action.

Explanation:

Rising action is a term used in literature to describe the corresponding portion of the story, that occurs immediately before the climax, by increasing its atmosphere or builds-up whereby the tension level surges.

Climax, on the other hand, is a form of the highest point major turning point in a story.

While falling action is the point where there is a quick decrease in tension level, and follows immediately after the climax

Resolution is also known as the final part of the story, it follows immediately after falling action.

Hence, when the problem within the story gets more intense and builds, this is the "Rising Action."

Answer:

124.8 inches

Explanation:

Answer:

A) Boiling points

B) Melting points

D) Phase (solid, liquid, gas) at room temperature

Explanation:

Intermolecular forces are attractive forces between molecules. Generally, intermolecular forces are much weaker than intramolecular forces.

All substances exist in one of three states: gas, liquid, or solid. The major difference between the condensed state and the gaseous state is the distance separating molecules.

The boiling points of substances often reflect the strength of the intermolecular forces operating among the molecules. At the boiling point, enough energy must be supplied to overcome the attractive forces among molecules before they can enter the vapor phase. If it takes more energy to separate molecules of substance A than of substance B because A molecules are held together by stronger intermolecular forces, then the boiling point of A is higher than that of B. The same principle applies also to the melting points of the substances. In general, the melting points of substances increase with the strength of the intermolecular forces.

Answer:

Time of vaporization = 0.588 minutes

Explanation:

The latent heat of fusion is the heat required to change the substance from solid (ice) to liquid completely, without further increase in temperature.

The latent heat of vaporization is the heat required to change a liquid to gas completely, without an increase in temperature.

Latent heat of vaporization = 6.8 times Latent heat of fusion

This means that the time it takes for the latent heat of vaporization to complete vaporization is 6.8 times lesser than the time it takes for the latent heat of fusion to complete fusion

Time of vaporization = 6.8 times lesser than time of fusion

Time of vaporization = (time of fusion) ÷ 6.8

where: Time of fusion = 4 minutes

∴ Time of vaporization = 4 ÷ 6.8

Time of vaporization = 0.588 minutes

Answer:

1

Explanation:

1 represents the element, Hydrogen

It has 1 shell/electron

Because hydrogen has only the one electron/shell, it can also lose that electron/shell to form a completely empty n = 1 shell.

Explanation:

pressure decrease and collision decreases

Answer:

1. The particles move freely in gaseous forms.

2. They are closest in the solid form.

3 SOLID

 - They are very closed with each other and are mostly non-living things and hard things.

-They are very hard to break

-Examples Table, chair etc

Gaseous

-They are very freely and are not packed

-They are mostly in gas and are in many forms.

- Examples : Hydrogen, Oxygen etc

Answer: 40

Explanation: 0.2 x 200

Answer:

C & D

Explanation:

The cell theory states that every living organism are made of some of the smallest functional unit called the cells. The three scientist who contributed to its development are Rudolf Virchow, Theodor Schwann and Matthias Schleiden.

Cell theory says that cell is considered to be the basic unit of our lives and living things are composed of one or more than one cells. The new cells in an organism arises from the existing cells.

Answer:

The volume is

Explanation:

In order to solve for the volume we use the formula for Boyle's law which is

where

P1 is the initial pressure

V1 is the initial volume

P2 is the final pressure

V2 is the final volume

Since we are finding the final volume we are finding V2

Making V2 the subject we have

From the question

P1 = 300 mmHg

V1 = 300 mL

P2 = 500 mmHg

Substitute the values into the above formula and solve for the final volume obtained

That's

We have the final answer as

Hope this helps you