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According to be Brogile equationλ=h/mv

Mass of electron=9.1×10−31kg

Planck's constant=6.626×10−34kgm2s−1

net log in gravitational potential energy = net gain in Spring potential energy

=> 1/2*(100)*(x²) = mgh=> 50x² = 1*10*20=> x² = 200/50 =4=> x = √4 = 2m

Answer:1) 12NExplanation: An object will weigh 1/6th weight on moon than earth. 72×1/6=12N

according to definition of continuity ,

lim of function is equal to function at that point.

Therefore, f(delta)

b) is correct

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Let the total length of the rope be 'L' and m be the mass per unit length.

Length of hanging rope 'L₂' = (1/3)L

Mass of hanging rope 'M₂' = (1/3)L× m

Length of the rope on the table 'L₁' = L - (1/3) L = (2/3)L

Mass of the rope on the table 'M₁' = (2/3)L× m

To find: Coefficient of friction between the rope and table.

Let 'μ' be the coefficient of friction between the rope and table.

Apply the motion of equation,

The weight of rope on the table = The weight of hanging rope

or, μ (2/3)L× mg = (1/3) L × mg

or, μ = 1/2 = 0.5

Hence, the required coefficient of friction between the rope and table will be 0.5

The aurora (Northern Lights and Southern Lights) mostly occur in thethermosphere. Thethermosphereis a layer of Earth's atmosphere. The thermosphereis directly above themesosphereand below theexosphere.

In ionosphere layar of the atmosphere,aurora is observed.

v= u+at (1)s= ut+1/2at^2 (2)v^2-u^2=2as (3)

The distance between two successive crests or troughs is known as wavelength so wavelength=100cm .(because distance between crest & trough is 50cm)in 0.2 second,it complete 20 wave in 1 second,it will complete 20x5=100 crests.so frequency is 100 Hz

Given:no of crest =no of troughs=40time=0.4 sFormula: frequency =no of wave/time taken1 wave correspond to 1 crest and 1 troughstherefore, v=40/0.4=100Hz

The moon will begin to move away from the Earth as Earth has hold the moon near to it using Gravity. As soon as this happens moon will become free begin to move away from the Earth in any direction.

The answer is option (2)

what is mewnot here there are many quatities whose symbol is mewnot

mu not can be permeability of free space

please clear the question firstly because many quantities have mewnot as there symbol

It is a device used to measure the angle of rotation of plane of polarisation rotated by an optically active substance.

principal-

Principles of Polarimetry. Polarimetry measures the rotation of polarized light as it passes through an optically active fluid. The measured rotation can be used to calculate thevalueofsolutionconcentrations; especially substances such as sugars, peptides and volatile oils

In biquartz polarimeters, a biquartz plate is used. Biquartz plate consists of two semi circular plates of quartz each of thickness 3.75mm. One half consists of right-handed optically active quartz,while the other is left-handed optically active quartz

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Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high.

Audible sound: The human ear can only recognizesoundsof frequencies in the range of 20 Hz and 20,000 Hz and this range of frequency is calledaudible sound. Inaudible sound:Soundwith frequency below 20 hertz and above 20,000 hertz is calledsoundofinaudiblerange.

As a car makes a turn, theforceof friction acting upon the turned wheels of the car providescentripetal forcerequired for circular motion. As a bucket of water is tied to a string and spun in a circle, the tensionforceacting upon the bucket provides thecentripetal forcerequired for circular motion.

Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the "normal" limit of human hearing. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high.

It's faster than the speed of sound, it's supersonic! ... Originally, the word supersonic meant "having to do with sound waves beyond human hearing," but by 1934 it described movement exceeding the speed of sound, with ultrasonic taking on the old meaning. Sonic comes from the Latin sonus, or "sound."

the ultrasonic probe is used to remove the lens material from the eye during a cataract surgery

it is in my long questions

pls give detailed ans

the ultrasonic probe is used to remove the lens material from the eye during a cataract surgery

Ans :- Attendance is the concept of people, individually or as a group, appearing at a location for a previously scheduled event. Measuring attendance is a significant concern for many organizations, which can use such information to gauge the effective ness of their efforts and to plan for future efforts.

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any body that produces sound is in a state of vibration.

The term "ultrasonic" applied to sound refers to anything above the frequencies of audible sound, and nominally includes anything over 20,000 Hz. Frequencies used for medical diagnostic ultrasound scans extend to 10 MHz and beyond.

1 option is the correct answer

4 is the best answer

option 4 is the correct answer

The term "ultrasonic" applied to sound refers to anything above thefrequenciesof audible sound, and nominally includes anything over 20,000 Hz

4

infrasonic sound is the right answer

batusesherhearing in the evening to navigateherway toprey.Batscontinuouslycatchinsectsusingan advanced navigation system called echolocation. Thebatemits very high frequencyultrasonicwaves. ...Theirsounds are reflected in the environment, hit different objects and as echoes return to thebat.

infrasonic sound is the right answer of this question

ultrasonic sound is the right answer of this question

INFRA SONIC SOUND WAVES ARE THE SOUND WAVES WHICH CAN BE HEARED BY BAT WHILE CATCHING THE PREY

On a larger scale,agricultureuses a large amount of water. Thus, updating old technology and investing in new methods to transport and hydrate crops and pastures could potentially conserve a large amount of water. Using sprayers rather than immersion methods to water crops saves a great deal of water.

Manufacturing is another sector that uses a large amount of water, and companies can invest in reuse and conservation techniques by upgrading their technology, fixing leaks, and so forth.

The same law of gravitation (given by Newton) describes the fall of an apple to the ground, the motion of the moon around the earth and the motion of planets around the sun. Similarly, the basic laws of electromagnetism (Maxwell’s equations) govern all electric and magnetic phenomena. The attempts to unify fundamental forces of nature reflect this same quest for unification.

In thesolidstate, ionic compounds such assodium chloridehave their ions fixed in position and therefore these ions cannot move sosolidionic compounds cannotconduct electricity. However in the molten state, ions in ionic compounds are free to flow and therefore moltensodium chloridecanconduct electricity..

No. It is not safe to repair electrical appliances outdoors during heavy downpour. This is because rain water contains dissolved salts. Therefore, rain water can conduct electricity. The electrician may get electrical shocks while working outdoors during rain.

1.Plating with silvercan enhance electrical conductivity, making it a highly-effective process for the manufacturing of electronics and electrical components.

2.Plating with palladiumcan absorb excess oxygen that commonly results during the manufacturing of catalytic converters for automobiles.

3.Many types of industrial electroplating create a barrier on the substrate that protects it against atmospheric conditions such as corrosion.

the correct answer is

10 is the correct answer of the given question

Ultrasound waves do not transmit well through dense bones or parts of the body that hold air or gas, however, such as the bowel. Medical procedures: Ultrasounds can be used to help guide certain procedures. Therapeutic applications: Ultrasounds can be used to detect and treat soft-tissue injuries

As the name suggests a geostationary satellite is the one which appears to be stationary in space to a observer on earth(geo).It is an earth-orbiting satellite, placed at an altitude of approximately 35,800 kilometers directly over the equator, that revolves in the same direction the earth rotates (west to east).