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Protection for corrosive metals - Metals which may corrode is COATED with less reactive METAL. This prrvents corrosion. Commonly USED metal for protection is ZINC and Cadmium.

Increasing conductivity - Gold and Silver which are highly conductive is incorporated in to IC in small amounts using electroplating.

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First, FIND a distance you know. Let’s use a ‘kilometer’ (because we all know what it is). Then, mark 2 points half that distance apart. And PUT a mirror facing the other at one of them. Shine a flashlight at the mirror, and MEASURE how long it takes to get to you.

So now you have how long it takes light, at a universal constant speed, to go one kilometer. So shine your light at the Moon, and see how long it takes to come back. You can then cross MULTIPLY and simplify to discover the moon is about 384,000 of your ‘kilometers’ away from Earth.

Using some common knowledge (or some math), you can figure out that the Moon takes 28 days to go completely around the Earth once. Plug your 384,000 km into the circle formula (circumference=2*radius(384,000 km)*pi(~3.13149) to find that the moons orbit is about 2,412,000 kilometers long. Divide that by how many of the time measures you WANT the speed in, (eg, divide by 28 for km per day, 40320 for minutes), and that’s the Moon’s speed!

ANSWER:

LOOSE electrons in the outermost ORBIT of atoms. The transfer of electrons on rubbing two different things lead to formation of charges on different bodies.

DETAILED:

There are free electrons attached to the surfaces of just about everything. So when you scrape a non-conducting material over the surface of another non-conductor you literally scrape off the electrons from the one. And that adds electrons to the other.  

Those electrons stay there until the SCRAPER TOUCHES a conductor. At which time all the electrons that were TRAPPED on the scraper jump off it and onto the conductor, often with a loud snap and an arc that can be seen in the dark.  

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It works by REFRACTING light, and breaking it according to its wavelength. You can purchase a triangular prism of glass or plastic from hobby stores, and you can also make a prism from a simple glass of WATER. Fill the glass with water so that it's slightly more than half full.

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First of all there’s NOTHING like NEGATIVE work, the negative just show the direction of motion, for EXAMPLE you are pushing a car in north direction but its motion is in south direction, so there is no DIFFERENCE in the direction of motion of car due to your force, then it’s just called negative work.
While in positive work the motion is in the same direction of the force, for example, pushing a box, you are applying the force in north direction and the motion of box is also in north direction.
In zero work there is no motion at all, even after applying force, for example, pushing a wall, there will be no CHANGE in position of wall after you apply any force on it.

COMPARE THE RELATIVE BRIGHTNESS
1)planets reflect the bright light of YEAR solay system's sun, which is RELATIVELY close to the earth.star ,by contrast,emit their own lights.
2)while some star may be much BRIGHTER and larger than our sun, these star are
much further from earth than the planet in our SOLAR system.

I hope my answer help you please say in comment my answer is WRONG or right

In physics, a HOMOGENEOUS material or system has the same properties at EVERY point; it is UNIFORM without irregularities. A uniform electric field (which has the same strength and the same direction at each point) would be compatible with homogeneity (all points EXPERIENCE the same physics).

this is ur answer:

The sign convention for spherical mirrors which APPLICABLE to both concave and convex mirrors follows a set of rules known as the “New Cartesian Sign Convention”, as mentioned below:

a. The pole (p) of the mirror is taken as the origin.

b. The PRINCIPAL axis is taken as the x-axis of our coordinate system.

c. The object is always placed on the left SIDE of the mirror which implies that LIGHT falling from the object on the mirror is on the left-hand side.

d. All the distances parallel to the principal axis are measured from the pole (p) of the mirror.

e. All the distances measured from the pole (p) on the right-hand side of the mirror are taken as positive and those on the left-hand side of the mirror are taken as negative.

f. Distances measured perpendicular to and above the principal axis are taken as positive.

g. All the distances below the principal axis are taken as negative.

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Muscular FORCE ALSO called as contact force because Force CAUSED by the action of muscles is called muscular force. Friction: Force acting between the surfaces of two objects is called force of friction.

Utilization of wind energy has been investigated for a long period of time by different researchers in different ways. Out of which, the Horizontal Axis Wind Turbine and the Vertical Axis Wind Turbine have now advanced design, but still there is scope to improve their efficiency. The Vertical Axis Wind Turbine(VAWT) has the advantage over Horizontal Axis Wind Turbine(HAWT) for working on omnidirectional air flow without any extra control system. A modified H-rotor Darrieus type VAWT is ANALYSED in this paper, which is a lift based wind turbine.The effect of solidity (i.e. chord length, no. of blades) on power coefficient (CP) of H-rotor for different tip speed ratios is numerically investigated. The study is conducted using time DEPENDENT RANS equations using SST k-ω model. SIMPLE scheme is used as pressure-velocity coupling and in all cases, the SECOND ORDER UPWIND discretization scheme is chosen for getting more accurate solution. In results, different parameters are compared, which depict the performance of the modified H-rotor Darrieus type VAWT. Double layered H-rotor having inner layer blades with longer chord gives higher power coefficient than those have inner layer blades with smaller chord.

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SPEED is EQUAL to DISTANCE over TIME s=d/t

s=72km/hr

I THINK the QUESTION is WRONG

Q = ne

Where,

Q is charge, n is no.of ELECTRONS and e is charge on 1 electron and that is approx. 1.6 X 10^19 in negatively.

n = Q/e

n = 1C/1.6 x 10^19

n = 6.25 x 10^18 electrons.

Hope it helps.....

1. Harp

Then, in turn, the soundboard causes the air within the volume enclosed by the sound box to vibrate, thereby ACOUSTICALLY amplifying the sound produced by the vibrating strings. Theharp has a set of strings of varying length, tension, and density. My large pedal harp has 47 strings.

2. Flute

The flute is made in the form of an open cylindrical air column about 66 cm long. Its fundamental pitch is middle C (C4) and it has a range of about three octaves to C7. Sound isproduced from a flute by blowing onto a sharp edge, causing air enclosed in a tube to vibrate.

3. Mandoline

The PAIR of strings is plucked with a small plectrum, or pick, now usually made of plastic. Mandolins produce a short, sweet sound, higher in pitch than a guitar. ... The mandolinoriginally developed from the lute, the instrument that is also the ancestor to the modern guitar.

4. Trumpet

Valves were added in 1820 and the length of the trumpet was shortened to about 4 ½ feet. Sound on a brass instrument comes from a vibrating column of air inside the instrument. The player makes this column of air vibrate by buzzing the lips while blowing air through a cup or funnel SHAPED mouthpiece.

5. Piano

When you press a key on the piano it causes a small hammer inside thepiano to hit a string or strings. Each key is connected to its own hammer or hammers which hit a specific string or number of strings. When the hammer hits a string, it vibrates and makes asound that is tuned to a specific note.

ANSWER:

Water

Explanation:

Because the TRASPIRATION is PROCESS of vapouring the water in PLANTS

BAD INSULATOR of HEAT

Where is the the FIG PLEASE TELL me so that I can HELP you

On average, the DISTANCE to the MOON is about 385,000 km (239,000 mi) from Earth's center, which corresponds to about 60 Earth radii. With a mean orbital velocity of 1.022 km/s (2,290 mph), the Moon covers a distance APPROXIMATELY its diameter, or about half a degree on the CELESTIAL sphere, each hour.

We know formula,


where is induced surface CHARGE density on each dielectric.
is initial surface charge on each PLATE.
K is dielectric CONSTANT.

we ALSO know , Q =

so,

=

now, put Q = 1.78 × 10^-6 C , K = 1.5 × 10^6

so, Qind = 1.78 × 10^-6(1 - 1/1.5 × 10^6)
= 1.7799988 × 10^-6 C

ANSWER with CORRECT SOLUTION

OFCOURSE both have same CHARGE in MAGNITUDE but differ in nature(+and -ve SIGNS.).

Explanation:

The value of acceleration due to gravity, supposed to be constant inside a SMALL spaceship orbiting around the earth, and HENCE astronaut FEELS weightlessness.If the SIZE of the space station around the earth is very LARGE, then the astronaut inside the spaceship will experience variation in acceleration due to gravity.

DISTANCE TRAVELLED by TRUCK in 100 s is 1000metre.

a SCHOOL bag MADE up of thin STRIP is harder to hold because the area of cross section decreases HENCE the pressure increases which RESULTS in more weight on our shoulder

According to dictionary it is (of women's clothes) MADE of delicate CLOTH and fitting to the body.

And according to science
A SLINKY is a toy precompressed helical spring INVENTED by Richard James in the early 1940s.

case 1 : A stone is DROPPED from a building of height h and time taken by stone to reach the ground is t.

then, h = 1/2 gt² ......(1)

case 2 : same stone is thrown VERTICALLY downward with SPEED u m/s. time taken by stone to reach the ground is t1.

so, -h = -ut1 + 1/2 (-g)t1²

h = ut1 + 1/2 gt1²

gt1² + 2ut1 -2h = 0 .......(2)

t1 = {-u + √(u² +2gh)}/g [ t1 ≠ {-u-√(u²+2gh)}/g]

case 3 : same stone is thrown vertically upwards with speed u m/s and time taken by stone to reach the ground is t2.

so, -h = ut2 + 1/2 (-g)t2²

or, h = -ut2 + 1/2 gt2²

or, gt2² - 2ut2 - 2h = 0.......(3)

t2 = {u + √(u² + 2gh)}/g [ t2 ≠ {u - √(u² + 2gh)}/g]

now, t1.t2 =[ {-u + √(u² +2gh)}/g ]. [ {u + √(u² +2gh)}/g ]

= (u² + 2gh - u²)/g²

= 2h/g

from equation (1),

t1.t2 = 2h/g = t²

or, t = √(t1.t2) This is required answer.

1 KILO watt kour or 1000 watt HOUR . USUALLY it's CALLED 1 electric Unit

They not BURN and they are brakedown

Conservative forces have two important properties:

A force is conservative if the WORK it does on a particle moving between any two points is independent of the PATH taken by the particle.

The work done by a conservative force on a particle moving through any closed path is ZERO. (A closed path is one in which the beginning and end points are IDENTICAL.) hope it will help you

7kg mass WOULD REQUIRE more FORCE than 4KG mass

It's impossible to MEASURE both MOMENTUM and POSITION of a MICROSCOPIC particle at the same time with accuracy.

Because Light Wavelength is actually less than a sound wave. AndDiffraction is more in LONGER wavelength waves, as is less in wider SLITS. The wavelength of sound is of the order of 1 METER. So any OBJET visible to the eye can deflect it.

As MOLECULES of TRANSPARENT MEDIUM are BOUND to each other

So H2 has will produce
as HCl+metal=salt+H2

Hey dude here is your answer...

☞The AMOUNT of diffraction (the SHARPNESS of the BENDING) INCREASES with increasing wavelength and decreases with decreasing wavelength.

☞ when the wavelength of thewaves is smaller than the obstacle, no noticeable diffraction occurs.

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Alloys made of mixtures of at least onemetal with either other METALS, or with non-metals. Examples of some common alloys are DETAILED in the following list: GUNMETAL (an alloy madefrom a mixture of COPPER, tin, and zinc)Steel (an alloy made from a mixture of iron and CARBON)

Actually it depends on the type of waves
for eg TRANSVERSE and longitudinal waves
In transverse waves the direction of propagation of wave is perpendicular to the direction of motion of string and it TRAVELS in vacuum not require and MEDIUM because they consist of oscillating electric (E) and magnetic (B) fields which are perpendicular. eg em waves and light whereas in longitudinal waves displacement of the particle is along the direction of wave and it requires a medium for propagation for eg sound waves it represents longitudinal waves because they consist of rarefaction and compression which are propagating in the wave.
*medium can be solid or LIQUID or GAS which also depends on their intermolecular forces between the molecules.

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The total AMOUNT of (net) work done by gravity as a SATELLITE makes acomplete orbit is ZERO. Thegravitational force has a component in the direction of the satellite's motionas the satellite moves toward the SUN(or Earth, or whatever).