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Amplitudeis the size of the vibration, and this determines how loud thesoundis.

Hence, option (c) is correct.

Amplitudeis a measure of the size of soundwaves.

Itdependson the amount of energy that started the waves. Greateramplitudewaves have more energy and greater intensity, so theysoundlouder.

The same amount of energy is spread over a greater area, so the intensity andloudnessof thesoundis less.

resistors of a conductor depend on these factors:1.on it's length2.on it's area of cross-section3.on the nature of it's material

thx

Loudness of soundis proportional to the square of theamplitudeof the vibration producing thesound. The loudness of sounddepends on its amplitude. When theamplitudeof vibration is large, thesoundproduced is loud. When theamplitudeis small, thesoundproduced is feeble.

the length is directly proportional to resistance.if length icreases resistance also increases.if length decreases resistance also decreases.

★ The length of the wire is directly proportional to the resistance of the wire.So, if the length of the wire is increases then the resistance of the wire also increases.

Length is directly proportional to resistance

if length increases resistance also increases

if length decreases resistence also decreases

Resistanceinvolves collisions of the current-carrying charged particles with fixed particles that make up the structure of the conductors. ... Theresistanceof a wire is directly proportional to itslengthand inversely proportional to its cross-sectional area.Resistancealsodependson the material of the conductor.

Resistanceinvolves collisions of the current-carrying charged particles with fixed particles that make up the structure of the conductors. ... Theresistanceof a wire is directly proportional to itslengthand inversely proportional to its cross-sectional area.Resistancealsodependson the material of the conductor.

the length is directly proportional to resistance if length increases resistance also increasesif length decreases resistance also decreases

the electric field is zero inside a conductor since all charge residues are at the surface

the correct answer is C

b. is the best answer

b is the correct answere

option, b is the right answer

option b . is the right answer

speed = distance/time;therefore, distance = speed*time;speed = 120km/h = 120*5/18 m/s;time = 6 sec; distance = 120*5*6/18 = 200m

The relation between kilowatt hour and joule is..1 kWh = 3,600,000 J

And

1 kWh = 3·6 MJ (mega joules)

distance travelled is the total path that is 4m+3m=7mand displacementconsider the 4m distance and 3m distance as the sides of a rectanglehence the shortest distance form origin is displacement using Pythagoras theoremdisplacement)^2=4^2+3^2displacement is 5

See everything is in present of zero gravity and in presence of zero external force hence if h is increase in height Mercury then h/2 will be decrease in CM of Mercury.

In math, reflection is the flipping ofafigure orapoint overa lineof reflectioncalledthemirror line. When we reflect something overa mirror lineit does not change size, and it faces the other way. It's as simple as that.

Accelerationis avectorquantity because it has both magnitude and direction. ... When an object has a negativeacceleration(it's slowing down), theaccelerationoccurs in the opposite direction as the movement of the object

Energy is scalar quantity.This is because mass is itself a scalar and velocity squared is also a scalar. Thus, kineticenergycomes out to be a scalar. Also, negative KineticEnergydoesnotimply that the body has positive kineticenergybut in the opposite direction.Energycan never be avector.Like if you find it useful

As we know that static friction = coefficient of static friction * normal reaction of the bodythat is friction = (u)Nalso N=(m)(g) =20* 10 = 200 N ( By just taking g= 10 m/s^2static friction = 0.6 * 200 = 120 Nwhen the external force will be applied on body .it will be start moving so in this case kinetic friction= 0.2 * 200 = 40 N

so the net force will be difference of both type of friction = 120- 40 = 80 Nwe know thatF= ma soa=F/mso by butting values 80/20 =4 m/s^2 (acceleration).

wrong answer

(c)is correct or option (d) i am confused but I am sure that (a) and (b) are wrong

c is the right answer

our civillistion lived in london and it was written by cyril edwinmitchinson joad bettter known as cem joad

Our Own Civilization By C.E.M. Joad (Cyril Edwin Mitchinson Joad)

A civilisation is the greatest achievement of humanity as it is the most powerful creature on the planet: its understanding, strength and senses are unlimited by biology so its potential for achievement is limitless, until it goessenile.

Hence, civilisation is theblossomingof human understanding, which realises wealth, order, knowledge, security, clear identity and sensible purpose; followed by theshrivellingof human understanding, which realises the opposite. A rise and fall revealed in itsuse of language, because the use of words is theexercise of understanding.

our civillistion lived in london and it was written by cyril edwinmitchinson joad bettter known as cem joad. ... The Story of Civilization was written in 1931. Author Cyril Edwin Mitchinson Joad was one of Britain's most colorful and controversial intellectual figures of the 1940s.

Ans :- A compound microscope is an instrument that is used to view magnified images of small objects on a glass slide. It can achieve higher levels of magnification than stereo or other low power microscopes and reduce chromatic aberration.

Zacharias Janssen

zacharias Janssen invented the first microscope

galleleo invent microscope

Zacharias Janssen invented first microscope

Zacharias janssen invented first microscope

please post a clear picture

The formula for torque when an electric dipole I'd placed in electric field is

Torque = PE Sin tetha

P = 2r(q) [ Dipole moment]

E = 1000000N/C

8√3 = 2 × 10^-2 (q) 10^5 Sin 60°

q = 8√3 ×2 / 2 × 10^3√3

q = 8 × 10^-3 C

Time of flight = 2* time to reach topmost point = 2*4s = 8s

Option (2) is correct.

total resistanceis series =10+10=20ohmfor parallel R=R1R2/R1+R2=10*10/20=5ohmpower =V^2/Rhence power is inversely proportional to resistancehence ration of P1:P2=R2:R1=5/10=1/2

Solution:

Area of cross-section of the wire,A=π (d/2)2

Diameter= 0.5 mm = 0.0005 m

Resistance,R= 10 Ω

We know that

∴length of the wire = 122.72m

If the diameter of the wire is doubled, new diameter=2×0.5=1mm=0.001m

Let new resistance be Rʹ

It's not a right answer

Acceralation is the termthat is used for this

thank u so much

Transverse Waves:Displacement of the mediumisperpendicularto the direction of propagation of the wave.

To understand this it is good to think of a rope being held still by person Band being moved up and down by person A. The direction of propagation is from person A to B, so you will see the waves move along this way. But the displacement will be up and down.

Can travel in solids, but not in liquids and gas.

eg.Electromagnetic radiation

Longitudinal Waves:Displacement of the mediumisparallelto the direction of propagation of the wave.

A good example for this is a slinky being pushed along the table, the propagation will be along the table and so will the displacement of all the 'rings'.

Can travel through all states of matter.

eg.Sound waves

f1/f2=1:3,so wavelength1/wavelength2=1:3as, wavelength1=v/f1wavelength2=v/f2

a is correct answer for this 3:1

3:1 is the correct answer of the given question

option A is a correct answer

After the electrolysis i.e. the process in which electric current is passed through aqueous solution of some compound or elements which leads to uts brrakdown into anions and cations, the copper sulphate solution will break down into Cu2+ cations and SO4 -2 anions. As a result the solution of copper sulphate which is blue in colour will no longer retain.

butt weldingjoint weldingarc welding

Arc welding is a welding process that is used to join metal to metal by using electricity to create enough heat to melt metal, and the melted metals when cool result in a binding of the metals