What is the Scientific
Method?

Answer:

3.7 mL

Explanation:

Step 1: Given data

Volume of water before the chalk is added: 8.7 mL

Volume of water after the chalk is added: 12.4 mL

Volume of the chalk: ?

Step 2: Calculate the volume of the chalk

The volume of the chalk is equal to the volume of water after the chalk is added minus the volume of water before the chalk is added.

V = 12.4 mL - 8.7 mL = 3.7 mL

Answer:

idk

Explanation:

Answer:

Here are possible ways to improve health and quality of life:

-Exercise almost everyday

-Be more positive

-Get rid of bad habits

-Start good habits

-Get new things

-Learn New things

Answer:

D

Explanation:

In the periodic table the noble gases are place in same column because the valence electron configuration is similar in all noble gas elements. Thus option D is correct.

A periodic table is defined as an organization of all known elements in increasing atomic number and repeating chemical properties.

It can also be defined as a tabular arrangement of chemical elements ordered by increasing atomic number and element groups.

There are more than 118 elements are arranged in modern periodic table.

Noble gases are defined as any of a class of rare gases that includes helium, neon, argon, krypton, xenon, and, most commonly, radon and display high stability and extremely low reaction rates.

Electronic configuration are defined as the electron configuration around the nucleus of a specific atom or molecule.

Thus, in the periodic table the noble gases are place in same column because the valence electron configuration is similar in all noble gas elements. Thus option D is correct.

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Answer:

Just as interesting as the effects of heat transfer on a system are the methods by which it occurs. Whenever there is a temperature difference, heat transfer occurs. It may occur rapidly, as through a cooking pan, or slowly, as through the walls of a picnic ice chest. So many processes involve heat transfer that it is hard to imagine a situation where no heat transfer occurs. Yet every heat transfer takes place by only three methods:

Conduction is heat transfer through stationary matter by physical contact. (The matter is stationary on a macroscopic scale—we know that thermal motion of the atoms and molecules occurs at any temperature above absolute zero.) Heat transferred from the burner of a stove through the bottom of a pan to food in the pan is transferred by conduction.

Convection is the heat transfer by the macroscopic movement of a fluid. This type of transfer takes place in a forced-air furnace and in weather systems, for example.

Heat transfer by radiation occurs when microwaves, infrared radiation, visible light, or another form of electromagnetic radiation is emitted or absorbed. An obvious example is the warming of Earth by the Sun. A less obvious example is thermal radiation from the human body.

:)

Further more info...

Conduction:

As  you walk barefoot across the living room carpet in a cold house and then step onto the kitchen tile floor, your feet feel colder on the tile. This result is intriguing, since the carpet and tile floor are both at the same temperature. The different sensation is explained by the different rates of heat transfer: The heat loss is faster for skin in contact with the tiles than with the carpet, so the sensation of cold is more intense.

Convection :

In convection, thermal energy is carried by the large-scale flow of matter. It can be divided into two types. In forced convection, the flow is driven by fans, pumps, and the like. A simple example is a fan that blows air past you in hot surroundings and cools you by replacing the air heated by your body with cooler air. A more complicated example is the cooling system of a typical car, in which a pump moves coolant through the radiator and engine to cool the engine and a fan blows air to cool the radiator.

Radiation :

You can feel the heat transfer from the Sun. The space between Earth and the Sun is largely empty, so the Sun warms us without any possibility of heat transfer by convection or conduction. Similarly, you can sometimes tell that the oven is hot without touching its door or looking inside—it may just warm you as you walk by. In these examples, heat is transferred by radiation. That is, the hot body emits electromagnetic waves that are absorbed by the skin. No medium is required for electromagnetic waves to propagate. Different names are used for electromagnetic waves of different wavelengths: radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Answer:

Creativity

Skepticism

Reasoning

Explanation:

Scientists must see a creative way to solve problems in the world. Scientists must also be skeptic about what is said, because if they were not, no one would disagree and the problems would never be solved. Reasoning is a must, as reasoning is involved in the scientific process and writing conclusions to their studies.

Hope this help!

Answer:

B

Explanation:

to find how many moles we have you need to use the molarity equation which for this is

40g * (1mole/200g) = .2 moles

Given we know that we have .2 moles

then all you have to do is divide amount of moles by amount of liters to find the molarity

for this problem it is

.2mol/2L which is .1 M

Statement 1 is false because heat is the movement of molecules.

Statement 2 is true because matter is composed of elementary particles which are VERY small.

Statement 3 is false because the kinetic energy of a particle determines its heat and it is impossible for a particle to be completely motionless.

Statement 4 is false because neutrons do not have a charge and make up a large portion of all matter.  

Answer:

Convection currents occur when a fluid is near a heat source.

Explanation:

Heat sources provide energy to their surroundings. When fluid receives this energy, molecules inside it move around more, spacing out from each other and lowering the density.

We know from helium balloons that things with lower densities than their surroundings are pushed upwards. Therefore, the fluid close to the heat source moves upwards, as it is hotter than the rest.

As this fluid moves up, cooler molecules drift down, succumbing to gravity.

As hot molecules move up and further from the heat source, they cool down, and drop. As colder molecules drop and move towards the heat source, they heat up, and begin rising.

This results in a circular motion called a convection current. It is present in the strong winds at the seaside and in the magma in the Earth's mantle.

Answer:

Cellulose, Coal, Natural Gas, Salt, and Crude Oil

Answer:

silver?

Explanation:

Answer:

a aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

Answer:

1730 cm

0.00256 km

5130 mm

Answer:

Air/gas

Explanation:

Sound can travel faster through air/gas more effectively than solids or liquids.

Answer:

a ruler

Explanation:

Answer:

They are found the same way but use different symbols when found.

Explanation:

You just need one to reach full energy. (A)

Only one electrons does chlorine need to obtain a full outer energy level of electrons. Thus, option A is correct.

An electron is defined as a subatomic particle which is charged negatively either bounded to an atom or not it means free. The nucleus of an atom is made up of electron, proton and neutron. The electron is a basic particle and electron is not made of anything.

The nature of electron is free it means they are present freely in nature and consist of an atom.The main function of electron is that they play the role of negatively- charged component of an atom.

The electrons are primary source of current conducting and electrons number as well as atomic number of an element is always same or equal. There is no size of electron but the mass of electron is 9×10^-31.

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Answer:

The photographic evidence of a long-unseen cosmic force is an extraordinary achievement in science. ... Exciting as it is, the photo actually doesn't capture the black hole itself, nor its interior. Astronomers aimed their telescopes at the event horizon, the invisible boundary thought to surround all black holes

Explanation:

Hope this helps :)

The correct answer is B: 121 and 123 Atomic Mass.

Mass spectrometers only detect stable isotopes.

Almost all elements exhibit isotopy. Isotopy is a phenomenon whereby atoms of the same atomic number have different atomic masses. The relative atomic mass of each element is the weighted average of the masses of all its isotopes.

Owing to the phenomenon of isotopy, the relative atomic mass of elements are not whole numbers.

The isotopes recorded by a mass spectrometer are stable isotopes of an element. The two stable isotopes of antimony are  Sb-121 and Sb-123. These two appear in its mass spectrum.

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Answer: the data are inadequate .

Explanation:

Answer:

method used is decomposition

Explanation:

Hydrogen Peroxide (H2O2) will decompose rapidly in the presence of Manganese Dioxide, acting as the catalyst, to produce Oxygen gas and water.

When the Hydrogen Peroxide and Manganese Dioxide are mixed, Oxygen gas bubbles should be seen coming from the mixture. One can collect this Oxygen gas produced over water (through water-displacement) and store it inside a bottle for later use.

Answer:

An existing theory is modified so that it can explain both the old and new observations.

Explanation:

The statement which  best describes how an existing theory is often affected by the development of new technology is that an  existing theory is modified so that it can explain both the old and new observations.

Theory is defined as a thoughtful explanation which is provided for observations which is constructed using scientific methods.The theory brings together many facts and hypothesis.

It is called as theory as it provides some set of assumptions initially which provide description to the field's approach to the subject.These are elementary theorems of a particular theory.It is a rational type of thinking about a set of observations.

They may be scientific,or non scientific or have no discipline at all.There are three types of theory:1) scientific, 2)philosophical and 3) moral.It provides explanation regarding the underlying mechanisms .

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Answer:

Vanadium

Explanation:

Atomic number increases, thereby changing into an atom of Vanadium

Answer:

Vanadium

Explanation:

Science rocks

Answer:

BE

Explanation:

Answer:

a. up

b. down

c. up

d. up

Explanation:

Answer:

1.51*10^23 atoms Rb

Explanation:

Use dimensional analysis

Answer: 2

Explanation:

Answer:

It is two

Explanation:

Answer:

argon is 18 2-8-8 since it has octet circle and fully stable you can say it has no electro negativity