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ANSWER:

Time = (-3/4a)  times of Initial Velocity

Explanation:

the velocity of a body moving along a straight line with uniform acceleration a REDUCES by 3/4 of its initial velocity.the TOTAL time of motion is?

Let SAY Initial Velocity = 4V

Velcoity Reduces by 3/4  =  (3/4)4V = 3V

Velocity at That Moment = 4V - 3V = V

Using V = U + aT

here V = V    & U = 4V      a = a    T = >

V = 4V  +  aT

=> T  = -3V/a = (-3/4)4V/a   = (-3/4a)(4V)

=> Time = (-3/4a)  time sof Initial Velocity

# Answer- m

# Explaination-

Applying law of conservation of momentum ALONG x-axis

m1u = m1v1.co45 + m2v2.cos45

m1u = 1/√2 (m1v1+m2v2) ...(1)

Applying law of conservation of momentum along y-axis

0 = m1v1.sin45 - m2v2.sin45

0 = 1/√2 (m1v1-m2v2) ...(2)

COEFFICIENT of restitution

e=(v2-v1.cos90)/ucos45

1 = √2.v2/u

u = √2v2 ...(3)

Solving (1)(2)&(3) we get

m1=m2=m

Hence MASS of unknown particle will be m.

The resistance of the Earth is non-zero, so current INJECTED into the earth at the grounding electrode produces a POTENTIAL rise with respect to a distant reference point. The resulting potential rise can CAUSE hazardous voltage, many hundreds of METRES AWAY from the actual fault location.

Light is REFERS to SHADES of COLOUR but bright refers to intensity of light.

Yes the no. of electrons emmited get increased by increasing INTENSITY
BCOZ with increase in intensity no. of photons increase.... which REMOVE more no. of electrons from surface of METAL

Re from whom I should ASK you only SAY for whom I should ask

Gravity changes with altitude. as we know The gravitational force is proportional to 1/R2, where R is your DISTANCE from the center of the Earth.

eg. The radius of the Earth at the equator is 6400 KILOMETERS.

Let's SAY you were in a jet at the equator that was 40 kilometers high above the earth's surface.

may be helpfull

Using Fleming's LEFT HAND rule the ANSWER is UPWARDS

I THINK that ANSWER will be

(B)by INTERFERENCE WELDING

If you WRITE down all the numbers from 1 to 100 then how many time do you write 3?
11
18
20
21

In particle PHYSICS, the Dirac EQUATION is a relativistic WAVE equation derived by .... The Dirac equation is superficially SIMILAR to the Schrödinger equation for a massive FREE particle:.

The first THREE equations describe FORCES: Newton's law of motion, Newton's law of gravity, and the forcelaw for a charged particle moving in a MAGNETIC and electric FIELD. ... InMaxwell's original work, he used a heuristic approach to DERIVE twenty scalar equations that describeelectromagnetism.

.. ATTRACTION between the lone and proton in a hydrogen atom". But what is 
a lone? A hydrogen atom has one electron and one proton. So, by lone you mean 
PERHAPS the electron. 
An electron is the smallest NEGATIVE charge while a proton is the smallest positive 
charge. The charge of an electron is -1.6 × 10⁻¹⁹ coulomb(C) while the charge of a 
proton is +1.6 × 10⁻¹⁹ C. To compute the FORCE between two charges, use the formula 
for the Coulomb force ... F = kQ₁Q₂ / r ² ... where k = 9 × 10⁹ N • m² / C² = constant. 
Using Q₁ for the charge of the electron and Q₂ for the charge of the proton, we get 
... F = ( 9 × 10⁹ N • m² / C² ) ( -1.6 × 10⁻¹⁹ C ) ( +1.6 × 10⁻¹⁹ C ) / ( 8.2 × 10⁻¹¹ m )² 
…... = -3.43 × 10⁻⁸ N 
for the magnitude of the force of attraction between the electron and the proton in a 
hydrogen atom. The negative sign in the force denotes attraction.

The AMOUNT of HEAT emitted by a BODY DEPENDS on its temperature and the quality of its surface.

The PRINCIPLE of PERSISTENCE of VISION is USED in the cinematography‍♀️‍♀️‍♀️

Uses of bleaching powder:

It is used for bleaching DIRTY clothes in the laundry, as a bleaching agent for cotton and LINEN in the textile industry.

It is a strong oxidizing agent hence used as an OXIDIZER in many industries.

It is used as a disinfectant which is used for disinfecting WATER to MAKE potable water.

At R/2 if R is radious of EARTH....PLEASE MARK as BRAINLIST

Indian pm Narendra Modi ANNOUNCED the country will ATTEMPT to launch it's first MANNED space mission by 2022

We know,
where h is height of TV tower , R is radius of earth and and d is maximum DISTANCE UPTO which the TV TRANSMISSION can be received.

Here, h = 100m
R = 8 × 10^6 m

so, d = √(2 × 100 × 8 × 10^6)
d = √(16 × 10^8) = 4 × 10^4 m
d = 40 km

hence, 40KM is the maximum distance upto which TV transmission can be received.

The walls are made of SOUND proof MATERIALS and windows have two panes with middle SECTION as vaccum to avoid sound interference.

what is GRAVITATION? and STATE the LAWS gravitation BRIEFLY?

Normal when a PN junction is REVERSED biased DEPLETION region

F=80 N..Is this a QUES from YESTERDAY's AIATS

Membrane type musical instrumentsproduce SOUNDS by the vibrations of thin STRETCHED membrane. A thinmembrane fixed TIGHTLY over a hollow WOODEN drum vibrates and produces sound. We have to strike the stretched membrane of the instrument with our HANDS or with sticks to make it vibrateand produce sound.

No but in ELECTROMAGNET we can change POLARITY and magnetic effect by increasing or decreasing ELECTRIC CURRENT

Earth is rotation sun it is own Axis 23 .5angle degree

The axis of rotation of the Earth is tilted at an angle of 23.5 degrees away from VERTICAL, perpendicular to THEPLANE of our planet's orbit around the sun. The tilt of the earth's axis is important, in that it GOVERNS the warming STRENGTH of the Sun's energy.

No STRESS
L THOUGHT it HELPS you

Noise pollution, also known as environmental noise or sound pollution, is the propagation of noise with harmful impact on the activity of human or animal life. The source of outdoor noise worldwide is mainly caused by machines, transport and transportation systems.[1][2] Poor urban planning may give rise to noise pollution, side-by-side industrial and residential buildings can result in noise pollution in the residential areas. Some of the main sources of noise in residential areas include loud music, transportation noise, lawn care maintenance, nearby construction, or young PEOPLE yelling (sports games). Noise pollution associated with household electricity generators is an emerging environmental degradation in many developing NATIONS. The average noise level of 97.60 dB obtained exceeded the WHO value of 50 dB allowed for residential areas.[3] RESEARCH SUGGESTS that noise pollution is the highest in low-income and racial minority neighborhoods.[4] Documented problems associated with urban environment noise go back as far as ancient Rome.[5]

High noise levels can contribute to cardiovasculareffects in humans and an increased incidence of coronary artery disease.[6][7] In animals, noise can increase the risk of death by altering predator or prey detection and avoidance, interfere with reproduction and navigation, and contribute to permanent hearing LOSS.[8] While the elderly may have cardiac problems due to noise, according to the World Health Organization, children are especially vulnerable to noise, and the effects that noise has on children may be permanent.[9] Noise poses a serious threat to a child’s physical and psychological health, and may negatively interfere with a child's learning and behavior. [10]

A comet is a ROCK formed by waste and gases available in SPACE
the tail is formed due to the gases MIXING in the space's atmosphere
this is a phenomenon which can't be seen easily


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Hi MATE!!

T is inversely PROPORTIONAL to √g

As g decrease at the surface of NEPTUNE
Time period increases.

by a factor of 2.83sec

Then the IMAGE is REAL and INVENTED and same SIZE as the OBJECT

In the PREDOMINANTLY BRITTLE regime up to about 100 MPA pressure, thecompressive strength increases non-LINEARLY with increasing pressure and correlates almost linearly with Young'smodulus. ... In contrast, this model cannot be used to APPROXIMATE thetensile strength.

In physics, the MAGNETIC Coulomb lawis the magnetic equivalent of the electric Coulomb law. An IMPORTANT DIFFERENCE is that—at the present state of knowledge—"magnetic CHARGES" (magnetic MONOPOLES) do not exist in nature, whereas electric charges do exist.

ANSWER:

Explanation:

• In the given question information given about a particle moving with initial speed and uniform acceleration.

• At first we have to find the distance travelled in first 2 sec.

• Second, we have to find the time TAKEN to REACH velocity 7.5 m/s.

• At last, we have to find the distance travelled in reaching the velocity of 7.5 m/s.

• According to given question :

It is TRANSPARENT and WHITE COLOUR can only be transparent that's why it is white in colour