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ANSWER:

HJD ugh duvdhdbxjidhsvxjshsbd dhxb2837&_63-y7$-7$2+

Answer:

HELO mate

Explanation:

Pythagoras. Early Greek philosophers alluded to a spherical Earth, though with some ambiguity. Pythagoras (6TH century BC) was among those said to have originated the idea, but this might reflect the ancient Greek practice of ascribing every discovery to ONE or another of their ancient WISE men.

ANSWER:

YES

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ANSWER:

I HOPE it was USEFUL for you...

ANSWER:

Chemical elements are found in different versions, called isotopes. Isotopes are elements that contain the same AMOUNT of protons, but differ in the number of neutrons in their nuclei. ... THEREFORE, oxygen 16 has 8 protons and 8 neutrons, oxygen 17 has 8 protons and 9 neutrons, and oxygen 18 has 8 protons and 10 neutrons.

I THINK this is the ANSWER

Because it is released by OURSELF, INNER we are so hot so when we release carbon dioxide it is hot but then it mixes with the cold air and it becomes at a room temperature.

Answer:

Like all metal carbonates, calcium carbonate REACTS with acidic solutions to produce CARBON dioxide gas. It is this reaction that is responsible for LIMESTONE fizzing when dilute hydrochloric acid is PLACED on its surface.

Explanation:

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Answer:

For a compound microscope, magnification is GIVEN by m = fofe(1 + FED) m = fofe + foD Thus, m is inversely PROPORTIONAL to the focal LENGTH of the eyepiece ...

TOP answer

The MOT test (Ministry of Transport, or simply MOT) is an annual test of vehicle SAFETY, roadworthiness aspects and exhaust emissions REQUIRED in the UNITED Kingdom for most vehicles over three years old used on any way defined as a road in the Road Traffic Act 1988; it does not apply only to highways (or in Scotland a relevant road) but includes other places available for public use, which are not highways.[1] In Northern Ireland the equivalent requirement applies after four years.[2] The requirement does not apply to vehicles used only on various small islands with no convenient connection "to a road in any part of Great Britain";[3] no similar exemption is listed at the beginning of 2014 for Northern Ireland, which has a single inhabited island, Rathlin.[4] The MOT test was first introduced in 1960 as a few basic tests of a vehicle and now covers 20 different parts or systems on or in the car.[5]

The name derives from the Ministry of Transport,[6] a defunct government department, which was one of several ancestors of the current Department for Transport, but is still officially used. The MOT test certificates are currently issued in Great Britain under the auspices of the DRIVER and Vehicle Standards Agency (DVSA) (formed as a result of the merger between the Driving Standards Agency (DSA) and the Vehicle and Operator Services Agency (VOSA)), an executive agency of the Department for Transport, and before 1 April 2014 by VOSA. Certificates in Northern Ireland are issued by the Driver and Vehicle Agency (DVA). The test and the pass certificate are often referred to simply as the "MOT".

About 20,100[7] local car repair garages throughout Great Britain, employing about 53,000 testers,[7] are authorised to perform testing and to issue certificates. In principle, any individual in Great Britain can apply to run a MOT station, although in order to GAIN an authorisation from DVSA, both the individual wanting to run the station, as well as the premises, need to meet minimal criteria set out on the government's website within the so-called VT01 form.[8]

In Northern Ireland tests are performed exclusively at the DVA's own test centres, although currently there is an open project investigating bringing Northern Ireland into line with the rest of the United Kingdom.

Answer:

The ELEVATION in the BOILING point is given by the expression ΔT  

b

​  

=K  

b

​  

⋅m.....(1)

The molality is given by the expression m=  

M  

2

​  

⋅W  

1

​  

W  

2

​  

​  

......(2)

Substitute EQUATION (2) in equation (1)

ΔT  

b

​  

=K  

b

​  

⋅  

M  

2

​  

⋅W  

1

​  

W  

2

​  

​  

Hence, the expression for the molar mass of the solute is

M  

2

​  

=  

ΔT  

b

​  

⋅W  

1

​  

K  

b

​  

⋅W  

2

​  

​ The elevation in the boiling point is given by the expression ΔT  

b

​  

=K  

b

​  

⋅m.....(1)

The molality is given by the expression m=  

M  

2

​  

⋅W  

1

​  

W  

2

​  

​  

......(2)

Substitute equation (2) in equation (1)

ΔT  

b

​  

=K  

b

​  

⋅  

M  

2

​  

⋅W  

1

​  

W  

2

​  

​  

Hence, the expression for the molar mass of the solute is

M  

2

​  

=  

ΔT  

b

​  

⋅W  

1

​  

K  

b

​  

⋅W  

2

​  

​

Explanation:

<P>Answer:

s-p overlapping and give its examples - definition

The overlap between ONE half filled s orbital of one ATOM and one half filed p orbital of another atom containing electrons with opposite SPINS is CALLED as s-p overlapping.

Answer:

Mg(HCO3)2 + HCL = CO2 + H2O + MGCL2 - Chemical EQUATION Balancer.

Explanation:

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Answer: 10 electrons

Explanation: NUMBER of electrons or proton present do not DEPEND on the mass of compound taken.

it REMAINS same whatever amount we take

in CH4 = 6 electron for Carbon and 4 electron for 4 Hydrogenxplanation:

ANSWER:

ABCDEFGHIJKLMNOPQRSTUVWXYZ

Explanation:

ABCDEFGHIJKLMNOPQRSTUVWXYZ

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ANSWER:

( 50.69 : 49.31 ) %

The average ATOMIC weight of BROMINE can be obtained by multiplying their RELATIVE abundance with MASS no.

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ANSWER:

ERROR in the question

Explanation:

ggggggcvvvvvcvvvvvvvvdfgvxcvxdv

Explanation:

The answer is (d) 0.10 mole. Stoichiometrically, 2 moles of Na3PO4 can react with 3 moles of BaCl2 to FORM 1 mole of Ba3(PO4)2. THEREFORE, 0.2 mole of Na3PO4 can only react with 0.3 mole of BaCl2 to form 0.1 mole of Ba3(PO4)2

Answer:

In general, the pH level of the blood is slightly alkaline, around 7.4. The pH of blood is very narrow and usually does not go anywhere beyond 7.45, with the ideal being 7.4. Basically, when an individual is healthy, his/her body pH is balanced between an alkaline and an acidic environment. HOWEVER, the pH for various parts of the digestive system vary according to the organ and the need of the enzymes. These are enlisted below:

Mouth:

The pH of saliva is usually slightly acidic to neutral, hovering around 6.5 to 7.5, so as to ensure proper functioning of the enzyme salivary amylase or ptyalin.

Stomach:

The pH of stomach is very low and highly acidic, being around 4-6 in the upper stomach and around 1.5-3 in the lower stomach. This low pH is DUE to the hydrochloric acid present in this organ, which helps to ensure proper functioning of the enzyme pepsin.

Intestines:

The pH of the intestines is usually slightly acidic to neutral, being around 5-7, as this is the pH at which the enzymes in this region functions.

Decrease in pH

Acidosis is a condition where there is low pH level in the body, due to which the blood becomes acidic. This happens due to the hydronium ion concentration increasing in the blood. So, when its value in blood falls below 7.35, the acidosis SYMPTOMS start showing up. This usually happens when there is less oxygen and an increase in CARBON DIOXIDE content in the blood. There are different kinds of acidosis, like respiratory, metabolic, diabetic, and lactic. Thus, the symptoms and treatment for each of these vary accordingly.

Increase in pH

Alkalosis is a condition where the pH levels increase to more than 7.45, usually due to a decrease in the hydrogen ion concentration. There are primarily two types of alkalosis, viz., respiratory and metabolic. Alkalosis of the respiratory type is usually due to hyperventilation, because of which there is a loss of carbon dioxide. Metabolic alkalosis is due to excessive vomiting, leading to loss of hydrochloric acid from the stomach. One of the main dangers associated with alkalosis is hypokalemia. Thus, the symptoms include muscle weakness, cramping, and constipation. The treatment for this condition varies depending on the type of alkalosis.

Answer:

solubility is the property of any substance to ionised completely into given solvent.

If the STRONGER solute and solvent they attract each other, then there is strong solubility.

If the weak solute and solvent there is less attraction, DUE to this weak solubility occurs.

Explanation:

Here is answer, hope it helps you.

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ANSWER:

no but it can DEPEND on the APPLICATION

ANSWER:

• STANDARD Potential of the cell is 0.36 V

Explanation:

Given information is:

The two reactions are:

And as we KNOW that losing of electrons is termed as Oxidation, and gain of electrons is termed as reduction.

We know,

• At ANODE: Oxidation takes place.
• At Cathode: Reduction takes place.

Therefore,

Reaction at anode:-  

Reaction at cathode:-  

So, the cell reaction is

Now we need to find standard potential of the cell i.e. Emf of cell.

Therefore, we know,

Substituting the values,

∴ Standard Potential of the cell is 0.36 V.

Note:- I have taken standard reduction potential but in the QUESTION standard oxidation potential is given. Therefore, you need to change it before substituting.

Answer:

Question 9

State two factors affecting the turning effect of a force.

Solution 9

Moment of force about a point depends on the following two factors:

(a)The magnitude of the force applied and,

(b)The distance of line of action of the force from the axis of rotation.

Question 10

The diagram shows two forces F1= 5N and F2 = 3N acting at points A and B of a rod pivoted at a point O, such that OA = 2m and OB = 4m

Calculate:

(i) the moment of force F1 about O.

(ii) the moment of force F2 about O.

(iii) total moment of the two forces about O.

Solution 10

Given AO=2m and OB=4m

(i)Moment of force F1(=5N) at A about the point O

=F1 x OA

=5 x 2= 10Nm (anticlockwise)

(ii)Moment of force F2(=3N) at B about the point O

= F2 x OB

=3 x 4=12 Nm(clockwise)

(iii)Total moment of forces about the mid-point O=

= 12- 10=2Nm(clockwise)

Question 11

When does a body rotate? State one way to change the DIRECTION of rotation of a body. Give a suitable example to explain your answer.

Solution 11

When the body is pivoted at a point, the force applied on the body at a suitable point rotates the body about the axis passing through the pivoted point.

The direction of rotation can be changed by changing the point of application of force. The given figure shows the anticlockwise and clockwise moments produced in a disc pivoted at its centre by changing the point of application of force F from A to B.

Question 12

Two forces each of magnitude 10N act vertically upwards and downwards respectively at the two ends A and B of a uniform rod of length 4m which is pivoted at its mid-point O as shown. Determine the magnitude of RESULTANT moment of forces about the pivot O.

Solution 12

Given, AB=4m hence, OA=2m and OB =2m

Moment of force F(=10N) at A about the point O

= F x OA= 10 x 2= 20Nm (clockwise)

Moment of force F (=10N) at point B about the point O

= F x OB= 10 x 2 =20Nm (clockwise)

Total moment of forces about the mid-point O=

=20 +20= 40Nm(clockwise)

Question 13

Write the expression for the moment of force about a given axis.

Solution 13

Moment of force about a given axis= Force x perpendicular distance of force from the axis of rotation.

Question 14

Figure shows two forces each of magnitude 10N acting at the points A and B at a separation of 50 cm, in opposite directions. Calculate the resultant moment of the two forces about the point (i) A, (ii) B and (iii) O, situated exactly at the middle of the two forces.

Solution 14

(i)Perpendicular distance of point A from the force F=10 N at B is 0.5m , while it is zero from the force F=10N at A

Hence, moment of force about A is

= 10 N x 0.5m=5Nm(clockwise)

(ii)Perpendicular distance of point B from the force F=10 N at A is 0.5m, while it is zero from the force F=10N at B

Hence, moment of force about B is

= 10 N x 0.5m=5Nm(clockwise)

(iii)Perpendicular distance of point O from either of the forces F=10N is 0.25 m

Moment of force F(=10N) at A about O= 10N x 0.25m

=2.5Nm(clockwise)

And moment of force F(=10N) at B about O

=10N x 0.25m=2.5Nm(clockwise)

Hence, total moment of the two forces about O

=0.25 + 0.25=5Nm (clockwise)

Question 15

What do you understand by the clockwise and anticlockwise moment of force? When is it taken positive?

Solution 15

If the turning effect on the body is anticlockwise, moment of force is called anticlockwise moment and it is taken as positive while if the turning effect on the body is clockwise, moment of force is called clockwise moment and is taken negative.

Question 16

A steering wheel of diameter 0.5m is rotated anti-clockwise by applying two forces each of magnitude 5N. Draw a diagram to show the application of forces and calculate the moment of forces applied.

Solution 16

Moment of couple = either force x couple arm

= 5 N x 0.5m

=2.5 Nm

Question 17

State one way to reduce the moment of a given force about a given axis of rotation.

Solution 17

Moment of force depends on the distance of line of action of the force from the axis of rotation. Decreasing the perpendicular distance from the axis reduces the moment of a given force.

Question 18

A uniform METRE rule is pivoted at its mid-point. A weight of 50gf is suspended at one end of it. Where a weight of 100gf should be suspended to keep the rule horizontal?

Solution 18

Let the 50gf weight produce anticlockwise moment about the middle point of metre rule .i.e, at 50cm.

Let a weight of 100gf produce a clockwise moment about the middle point. Let its distance from the middle be d cm. Then,

according to principle of moments,

Anticlockwise moment = Clockwise moment

50gf x 50 cm=100gf x d

So, d=

Question 19

State one way to obtain a greater moment of a force about a given axis of rotation.

Solution 19

Moment of a force is the product of the force and the perpendicular distance of force from axis of rotation. So, one way to increase the moment would be to increase the distance from the axis of rotation where the force would act.

Question 20

Answer:

• Molar CONDUCTIVITY of the SOLUTION is 500 S cm² mol⁻¹

Given:

1. Molarity (M) = 0.01 M
2. Resistance (R) = 200 Ω
3. CELL CONSTANT = 1 cm⁻¹

Explanation:

We Know from the formula,

⇒ Cell constant = κ × R

Here,

• κ Denotes conductivity.
• R Denotes resistance.

⇒ 1 = κ × 200

⇒ κ = 1/200

⇒ κ = 1/200 S cm⁻¹

∴ Conductivity (κ) of the solution is 1/200 S cm⁻¹.

From the formula we know,

Here,

• κ Denotes conductivity.
• M Denotes Molarity.

Substituting the values,

∴ Molar Conductivity of the solution is 500 S cm² mol⁻¹.

ANSWER:

• NITROUS oxide
• Chemical FORMULA is N20

Answer:

• Democritus
• DemocritusLesson SUMMARY. AROUND 450 B.C., the GREEK philosopher Democritus introduced the idea of the atom. However, the idea was ESSENTIALLY forgotten for more than 2000 years. In 1800, John Dalton re-introduced the atom.

Explanation:

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Answer:

Explanation:In writing the electron configuration for CHLORINE the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for Chlorine go in the 2s orbital. The next six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the next two electrons in the 3s. Since the 3s if now FULL we'll move to the 3P where we'll place the remaining FIVE electrons. Therefore the Chlorine electron configuration will be 1s22s22p63s23p5.

Answer:

In order to write the Phosphorus ELECTRON configuration we first need to know the number of electrons for the P atom (there are 15 electrons). When we write the configuration we'll put all 15 electrons in orbitals around the nucleus of the Phosphorus atom.

In writing the electron configuration for Phosphorus the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the NEXT 2 electrons for Phosphorous go in the 2s orbital. The next six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the next two electrons in the 3s. Since the 3s if now full we'll MOVE to the 3p where we'll place the remaining three electrons. Therefore the Phosphorus electron configuration will be 1s22s22p63s23p3.xplanation:

ANSWER:

noh3.................

☆ MASS of sodium carbonate = 5.3 g (given)

☆ Mass of ETHANOIC acid = 6 g (given)

☆ Mass of sodium ethanoate = 8.2 g (given)

☆ Mass of Carbon dioxide = 2.2 g (given)

☆ Mass of water = 0.9 g (given)

Now, total mass before the reaction = (5.3 + 6) g

= 11 . 3 g

And, total mass after the reaction = (8.2 + 2.2 + 0.9 ) g

= 11.3 g

total mass before the reaction = total mass after the reaction.

Hence, the given observations are in agreement with the LAW of conservation of mass.

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ANSWER:

protons

Explanation:

it MAY HELP you

ANSWER:

ANUSH is GREAT

Explanation:

Anush is great

Answer:

1s^2 ,2s^2 , 2p^6 , 3S^ 2, 3P ^6

ANSWER:

two hydrogen bonds

Notice that each base PAIR consists of a PURINE and a pyrimidine. The NUCLEOTIDES in a base pair are complementary which means their shape ALLOWS them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds.

Explanation:

RAOULT's law states that for a solution of volatile liquid, the partial VAPOUR pressure of each COMPONENT in the solution is directly proportional to its mole FRACTION. THUS if there is solution of two liquid component 1and 2, then.

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ANSWER:

OPTION 2 is the answer of this QUESTION OK

ANSWER:

the FOLLOWING EXAMPLE are ACID

Answer:

EXPLANATION:METALS can be moulded into different SHAPES

Answer:

A MIXTURE consisting of TWO Miscible liquids WHOSE boiling point's differ by 50 degree C can be separated by Distillation Process.

Explanation:

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ANSWER:

EXPLANATION:

FALSe

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Explanation:

Plzz read carefully

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Pari- "ek-ek wish batao main poori karugi."

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dedicated 2 all kamine frnds.

Friendship is not about "sorry".

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NEVER ASK

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Say "I Miss U"

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"Can U Help Me?"

Say "Do This For Me"

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I Can't Live Without U

Say I Live 4 U

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C=1. H=4. O=4. As the number of atoms in the reactants side is equal to the number of atoms in the product side, the reaction is balanced.

Pb(NO3)2+ kl =Pbl+ KNO3 = On(NO3)2+ 2KL =) PBL2 + 2KNO3.

ANSWER:

FALSE..... Hope it HELPS you DEAR... If it is HELPFUL thank me

Answer:

• If any of the bonds are replaced with DOUBLE or triple bonds, or if RINGS are involved, there would be a “deficiency” of H atoms.

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Answer:

As to why silver is the BEST conductor, the answer is that its ELECTRONS are freer to move than those of the other elements. This has to do with its valence and crystal STRUCTURE. Most metals conduct ELECTRICITY....

ANSWER:

ਨਿਰਤਰਤਾ ਅਤੇ ਇੱਕਸਾਰਤਾ ਦੇ ਸਿਧਾਂਤਾ ਬਾਰੇ ਲਿਖੋ

ANSWER:

IODINE MAY be the answer

Given:

• Volume of GAS occupied at 0°C = 3L
• Temperature of gas 1 = 0°C
• Pressure is constant

To find:

• Volume of same gas at -20°C

Solution:

USING CHARLES law

V1/T1 = V2/T1

Where

V1 : Volume of gas 1 = 3L

T1 : temperature of gas 1 = 0°C = 273K

V2 : volume of gas 2 = ?

T2 : Temperature of gas 2 = -20°C = 253K

Substituting the values we have

→ 3/273 = V2/253

→ 3(253)/273 = V2

→ 759/273 = V2

→ V2 = 2.78 L

Hence ,volume becomes 2.78 L

Answer:

The Schrödinger EQUATION is a linear partial DIFFERENTIAL equation that describes the wave FUNCTION or state function of a quantum-mechanical system. ... The concept of a wave function is a fundamental POSTULATE of quantum mechanics; the wave function defines the state of the system at each spatial position, and TIME.