In J.J. Thomson's plum pudding model of the atom, the plums represent
and the pudding represents
A
large neutral charged mass, large positively charged mass
B)
large positively charged mass, electrons
electrons, large positively charged mass
electrons, large neutrally charged mass

Answer:

i also have to do this lol

Explanation:

Answer:

The correct option is;

C. Two in the first energy level, six in the second energy level

Explanation:

The electrons in an atom are arrange in orbital shells which are situated at different levels within the structure of the, depending on the energy of the electron. Electrons with the least amount of energy are found in the shell closest to the nucleus of the atom which is the first energy level

The maximum number of electrons that can be found in a given an energy level is obtained with the following formula;

The number of electron = 2 × n²

Where;

n = The number of the different energy level

Therefore;

The maximum number of electrons in the first energy where n = 1 is given as follows;

The number of electron = 2 × 1² = 2 electrons

The maximum number of electrons in the second energy level where n = 2 is given as follows;

The number of electron = 2 × 2² = 8 electrons

Given that there are only 8 electrons in the atom, we therefore have, 2 electrons in the first energy level and the remaining 8 - 2 = 6 electrons in the second energy level.

Answer:

yeeehhhhhh

Explanation:

basically my charger doesnt work

A computer model will benefit a scientist while studying the blood cells for medical research because that would enable the scientist to see how the flow of the blood cells will look like when it is slowed down.

Our blood contains a number of blood cells which are suspended in a liquid which is known as plasma. Blood cells are the constituents of blood and are of different types like Red blood cells (RBCs), white blood cells (WBCs), Platelets etc. Plasma contains about 92% water and the most abundant solutes present in it are the plasma proteins and they include globulins, albumins etc.

Computer models help us to observe blood and its components and can provide us more insights and observation into the blood flow as we are able to slow it down as per our convenience.

Hence, option B is the correct answer.
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Answer:

C)  66 calories

Explanation:

The Heat energy required to flow into a unit mass object to raise its temperature by 1 degree is known as specific heat capacity.

specific heat capacity of aluminum, c = 0.22 cal/g°C

mass of aluminium, m = 20.0 g  

Answer:

The most important use of hydrocarbons is for fuel. Gasoline, natural gas, fuel oil, diesel fuel, jet fuel, coal, kerosene, and propane are just some of the commonly used hydrocarbon fuels. Hydrocarbons are also used to make things, including plastics and synthetic fabrics such as polyester.

Answer:

Lithium

Explanation:

Using the periodic table, the selection of the element that best fits the following descriptions is lithium. The correct option is D.

A periodic table is a table that contains chemical elements in it. It is a tabular structure that displays elements according to their characteristics. It is used in chemistry and physics.

Lithium is an element that is present in the first row of the periodic table. The first row is called the alkali metals. Its atomic number is 3, and it is white and silvery.

Alkali metals are called alkali because they form alkalies reacting with water. Like lithium hydroxide. They are very strong bases. They are very reactive.

Thus, the correct option is D. lithium.

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Answer:

An organ would have more kinds of specialized cells because it is made up of different tissues.

Answer:

83.637562

Explanation:

Answer:

The atomic number

Answer:

The diagram shows oxygen, O₂, which consists of two atoms of oxygen in the stratosphere, which are the two beings holding hands, forming a couple being broken up by the intense ultraviolet radiation of the Sun, such that the couple closest to the Sun are the ones that were broken into two O, atoms.

After being broken, the two beings (oxygen atoms), become free to move as they please, making them able to move faster than when they were still a couple. However, due to the likeness for their fellow beings, each of the single O beings rushed to meet the other two still coupled O₂ beings, whereby one O being rushing to meet one O₂ couple each, to form O₃ which is a new group consisting of three beings holding hands known as Ozone

Note, that O stands for atomic oxygen gas

O₂ stands for oxygen gas

O₃ stands for ozone gas

Explanation:

Answer:

far apart

Explanation:

The molecules of any gaseous compounds are loosely bound and the molecules are far apart from each other. They move freely and rapidly. The inter-molecular forces are lower as compared to a solid or a liquid where the molecules are comparatively closely bound in the compounds.  

Because of the large gap or distance between its molecules, gaseous compounds have less density  when compared to any solid or liquid.

Answer:

B

Explanation:

Because a ball falling down is a good strong force

Correct Answer:

A ball hitting a bat

Answer:

158g

Explanation:

To calculate the "weight" (mass) of ethyl alcohol, we have to use this formula:

- Density will have units of gmL when dealing with a liquid or units of gcm3 when dealing with a solid.

The mass has units of grams, g.

The volume will have units of mL or cm3

We are given the density and volume, both of which have good units so all we have to do is rearrange the equation to solve for the mass:

density×volume=massvolume×volume

Density×Volume = Mass

0.789gmL×200.0mL

Thus, ethyl alcohol weighs 158g.

Answer:

a) 67000 b) 0.20 c) 52.8010 d) 3.17000

Explanation:

your welcome :)

a) 67000 b) 0.20 c) 52.8010 d) 3.17000 are the answers respectively.

Distance is a physical quantity which is measured in meter. If a man travel then it is measured in meters that defines that how much he travel from one point to another point for all these type of things we use to measure distance.

Centimeter is also a physical quantity which is use to measure distance. 1 centimeter is equal to 0.01 meter and 1 centimeter is equal to 0.00001 kilometer.the kilometer is large quantity to measure distance while centimeter is smaller quantity to measure distance.

Kilometer is also a physical quantity which use to measure the distance 1 kilometer is equal to 1000 mtr and 1 kilometer is equal to 100000 centimeter.

For above conclusion, we easily states that the kilometer is large quantity to measure distance while centimeter is smaller quantity to measure distance. Centimeter is also a physical quantity which is use to measure distance. 1 centimeter is equal to 0.01 meter and 1 centimeter is equal to 0.00001 kilometer.

Therefore, a) 67000 b) 0.20 c) 52.8010 d) 3.17000 are the answers respectively.

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Answer:

All these conversion factors are equal to 1. If it doesn't seem obvious at first, think about it for a second. Realize that 1 minute is equivalent to 60 seconds. Simply replace 1 minute in the fraction with its equivalent 60 seconds and it becomes clear that 60 seconds / 60 seconds = 1. Numerator and denominator are equivalent; they are just expressed differently.

Explanation:

The initial unit cancels out and goes into the new unit

In science, we often need to convert from one unit to another to ensure accuracy of our calculations.

Let's say i want to convert 500 minutes to seconds.

The conversion factor is as follows;

60 seconds make 1 minute

x seconds make 500 minutes

x = 60 seconds * 500 minutes/1 minute

x = 30,000 seconds

Hence the initial unit which is "minutes" is canceled  out and the new unit "seconds" remains.

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Answer:

the group 0 elements, the noble glass. are all unreactive ,non-metal gases . they show trends in their physical properties.

Explanation:

their uses depend on their inertness.

Answer:

a.) figure A.

b.) figure B.

Explanation:

in the physical change the mater stays in the two color groups there is still balance

in chemical change they seperate and break of into matching pairs

Answer:

d

Explanation:

The train will travel for 2 hours to travel a distance of 100 miles with a speed of 50m/h. Therefore, option (C) is correct.

The speed of a body is defined as the rate of change in the position of a body w.r.t. time.

Speed is a scalar parameter with both magnitude and no direction. A simple mathematical formula common way to determine speed.  

S = d / t

where S is the speed, d is the distance moved by a body and t is the time.

Although the SI unit for speed is the same as velocity is m/s and can also be expressed in miles per hour (mph), and kilometers per hour (kph).

Given, the distance traveled by train, d = 100 miles

The time taken by train = 2 hrs

The speed of the train = distance/ time = 100/2 = 50m/h

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Answer:

8.9168 is the answer..

Answer:

500 cubic centimeters of water (cm3 - cc)

Explanation:

1 milliliter of water (ml) = 1.00 cubic centimeters of water (cm3 - cc)

The volume in cubic centimeters of a 500 mL beaker is 500 cubic centimeters of water (cm3 - cc)

The two major units used to measure liquid volume are the liter and the milliliter. When measuring huge amounts of liquid, literal is utilized. Furthermore, ml is used to measure very small amounts of liquid.

Measurement units are the units I use to determine the size, number, or quantity of any object.

7 universally accepted basic units of measurement are utilized in daily life. These meters are the units of measurement used to measure distance. Second, used as a unit of measurement of time.

1 milliliter of water (ml) = 1.00 cubic centimeters of water (cm3 - cc).

Therefore, 500 cubic centimeters of water (cm3 - cc).

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Answer:

pick any example

Explanation:

the revolution of the Earth around the Sun

The period of revolution of the Earth around the Sun is equal to one year.

The Earth makes one revolution on its axis in about 24 hours.

This motor operates at a speed of 5,000 revolutions per minute.

Conversion : J ➝ Cal

[tex]\bigstar\:\boxed{\bf{\purple{4.2\:Joule=1\:Cal}}}[/tex]

[tex]:\implies\sf\:3.5\times 10^6\:J[/tex]

[tex]:\implies\sf\:3.5\times 10^6\:J\times \dfrac{1\:Cal}{4.2\:J}[/tex]

[tex]:\implies\sf\:0.833\times 10^6\:Cal[/tex]

[tex]:\implies\bf\:8.33\times 10^5\:Cal[/tex]

Answer:

8.6g/cm³ (BRASS)

Explanation:

Given the following :

Mass of object = 86g

Volume of object = 10cm³

The density of an object is calculated using the formula :

Density(g/cm³) = mass(g) / volume(cm³)

Inputting our values :

Density = 86g / 10cm³

Density = 8.6g/cm³

According to the table provided, the object which corresponds to having a density of 8.6g/cm³ is BRASS

1. The density of the material is 8.6 g/cm³.  

2. The material is brass

Density is simply defined as the mass per unit volume of a substance i.e

The density of the material can be obtained as shown below

Mass = 86 g

Volume = 10 cm³

Density = mass / volume

Density = 86 / 10

Therefore, the density of the material is 8.6 g/cm³

From the calculation made above, the density of the material is 8.6 g/cm³.

Comparing the density of the material (i.e 8.6 g/cm³) with those

given in the table from the question, we can conclude that the

material is brass.

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Answer:

132N

Explanation:

F=ma

F=66×2

F=132N

The answer is 132 N

The parameters given in the question are;

mass= 66 kg

acceleration= 2m/s

Therefore the force can be calculated as follows;

F= mass × acceleration

= 66 × 2

= 132

Hence the force needed is 132 N

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Answer:

693000

Explanation:

Multiplying anything by 10 must follow the base 10 system rules.

That means we can simply move the decimal 5 places to the right.

6.93 x 10⁵ = 693000

My answer to the question is 693000.

Answer:

They form between the hydrogen atoms of different water molecules.

Explanation:

A hydrogen bond is always a dipole-dipole bond. It is an attraction between a slightly positive atom of a molecule with the negative atom of the another molecule containing hydrogen. Thus, in a water molecule, oxygen atom will attract the electrons in the O–H bonds. Its interaction always involves a hydrogen atom.

They form between the hydrogen atoms of different water molecules is the correct statement about hydrogen bonds.

A hydrogen bond refers to a kind of bond that occurs from the attraction between a hydrogen atom and a negatively charged oxygen, fluorine, or nitrogen atom.

This attraction, for its part, is known as a dipole-dipole interaction and links the positive pole of one molecule with the negative pole of another.

Therefore, we can conclude that they form between the hydrogen atoms of different water molecules is the correct statement about hydrogen bonds.

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