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t is depend UPON mass and gravitional ACCELERATION as mercury has more DENSITY sand density depends upon mass so the wight of mercury is greater than water so the best OPTION is C

object is at REST then its DISPLACEMENT is ZERO as workdone depend on displcement so workdone is also 0

is IDEAL FUEL because it is eco-friendly.it CREATES no POLLUTION in the ENVIRONMENT

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the will be coming from SUN and some are PRESENT in AIR median and come out by a reactionEg lazer

modulation process, two signals are used namely the modulating signal and the carrier . The modulating signal is nothing but the baseband signal or information signal while the carrier is a high frequency sinusoidal signal .In the modulation process, some parameter of the carrier wave (such as amplitude, frequency or phase ) is VARIED in accordance with the modulating signal . This modulated signal is then transmitted by the transmitter .The receiver demodultes the received modulated signal and gets the original information signal back .Thus, demodulation is exactly opposite to modulation .In the process of modulation the carrier wave actually acts as carrier which carries the information signal from the transmitter to receiver .Need of ModulationYou may be ask, when the baseband signal can be transmitted directly why to use the modulation ?The answer is that the baseband transmission has many limitations which can be overcome using modulation . It is explained below .In the process of modulation, the baseband signal is translated i.e., shifted from low frequency to high frequency . This frequency shift is proportional to the frequency of carrier.Advantages of ModulationReduction in the HEIGHT of antennaAvoids mixing of signalsIncreases the range of communicationMultiplexing is possibleImproves quality of receptionWe will discuss each of these advantages in detail below .1. Reduction in the height of antennaFor the transmission of radio signals, the ANTENNA height must be multiple of λ/4 ,where λ is the wavelength .λ = c /fwhere c : is the velocity of light f: is the frequency of the signal to be transmittedThe minimum antenna height required to transmit a baseband signal of f = 10 kHz is calculated as follows :eq1The antenna of this height is practically impossible to install .Now, let us consider a modulated signal at f = 1 MHz . The minimum antenna height is given by,eq2This antenna can be easily installed practically . Thus, modulation reduces the height of the antenna .2. AVOIDS mixing of signalsIf the baseband sound signals are transmitted without using the modulation by more than one transmitter, then all the signals will be in the same frequency range i.e. 0 to 20 kHz . Therefore, all the signals get mixed together and a receiver can not separate them from each other .Hence, if each baseband sound signal is used to modulate a different carrier then they will occupy different slots in the frequency domain (different channels). Thus, modulation avoids mixing of signals .3. Increase the Range of CommunicationThe frequency of baseband signal is low, and the low frequency signals can not travel long distance when they are transmitted . They get heavily attenuated .The attenuation reduces with increase in frequency of the transmitted signal, and they travel longer distance .The modulation process increases the frequency of the signal to be transmitted . Therefore, it increases the range of communication.4. Multiplexing is possibleMultiplexing is a process in which two or more signals can be transmitted over the same communication channel simultaneously .This is POSSIBLE only with modulation.The multiplexing allows the same channel to be used by many signals . Hence, many TV channels can use the same frequency range, without getting mixed with each other or different frequency signals can be transmitted at the same time .5. Improves Quality of ReceptionWith frequency modulation (FM) and the digital communication techniques such as PCM, the effect of noise is reduced to a great extent . This improves quality of reception .

ilk is specially used to make cheese. Products made : milk beverages ICE cream BUTTER CONDENSED milk even YOGHURT

it MIGHT be -20

ation between u, v and f for a convex lens is, v-1 + u-1 = f-1 Using the proper sign convention, u is negative, u negative, v and f are positive. So we have, COMPARING with y = MX + c, graph between v-1 & u-1  is negative with slope –1 and intercept  f-1 .The corresponding graph is as shown in FIGURE. Proceeding in the similar manner as discussed in case of a CONCAVE mirror the focal LENGTH of the lens can be calculated by measuring the coordinates of either of the points A, B and C. u–v Graph The u versus v graph is a hyperbola as shown in figure. By measuring the coordinates of point C whose coordinates are (2f, 2f) we can calculate the focal length of the lens.

an't SEE IMAGE CLEARLY

I don't KNOW OK BRO

ere is your answer. Because there is no medium LIKE air ,which can reflect the light of sun.Hope it will help you. PLEASE MARK IT AS A BRAINLIEST ONE. ☺☺☺☺

ng rod (US, AUS) or LIGHTNING conductor (UK) is a metal rod mounted on a structure and intended to protect the structure from a lightning strike. If lightning hits the structure, it will preferentially strike the rod and be CONDUCTED to ground through a wire, instead of passing through the structure, where it COULD start a fire or CAUSE electrocution. Lightning rods are also called finials, air terminals or strike termination DEVICES.

gnification = -v/u3 = -v/20v = -60cmtherefore the IMAGE is FORMED at 60CM AWAY from POLE

n :___________________________________________________Given & To Find : An object is DROPPED from a height of 100m, after 3 seconds, find the distance travelled by the object ,.We know that acceleration due to gravity is 9.8 m/s²⇒ a = 9.8m/s²⇒ t = 3s (given in Q)⇒ u = 0 (object started from rest)We know that, s = ut + at² s = 0 x 3 + x 9.8 x 3² s = 0 + 4.9 x 9 s = 44.1 m∴ The distance travelled by the object = 100 + 44.1 = 144.1 m (s is displacement, distance = total path length,. HENCE 100m should be added,.)_________________________________________________                    Hope it HELPS !⇒ Mark as Brainliest (if you like)

ind its acceleration USING, F=maThen find its final VELOCITY using, V= atBy s=v^2/2as [u=0m/s, so I have not WRITTEN u ]By the FORMULA of work, W=fs find work

p would not be as high as the normal heatdue to the porous NATURES of POT

ghtedness, ALSO known as short-sightedness and myopia, is an eye disorder where light FOCUSES in front of, instead of on, the retina.Myopia occurs when the eyeball is too long, RELATIVE to the focusing power of the cornea and lens of the eye. This causes light rays to focus at a point in front of the retina, RATHER than directly on its surface.Myopia may be corrected with lenses. Concave lenses are used here. They spread the light out before it reaches the CONVEX lens in the eye, therefore letting the image focus directly on the retina.

fission ,in coolant MODERATOR GRAPHITE core or ROD is used

sitive and negative WIRE touch with each other then SPARK is generated is CALLED SHOT CIRCUIT >fuse is used to prevent shot circuit

the acceleration DUE to GRAVITY on the top of Mount Everest? Mount Everest is the highest mountain peak of the world at the height of 8848 m. The VALUE at sea LEVEL is 9.80 m s^-2.

y suspended magnet will also point towards SOUTH. The south pole of AMAGNET bar POINTS towards NORTH because the magnetic field AROUND the earth happens to have its north pole towards north. South and north attract eachother. The magnetic north pole that is.

udent,Please find below the SOLUTION to the asked query:The moment of INERTIA of the cylinder I=12mr2Let US consider the velocity of the block after it falls through HEIGHT  h is v. Then equatingkinetic ENERGY and potential energy we get12Iω2+12mv2=mgh⇒12mr22(vr)2+12mv2=mgh⇒32mv2=mgh⇒v=2gh3‾‾‾‾√Now if a is the acceleration then we haveh=12at2⇒t2=2haand v=at⇒t=va=2gh3a2‾‾‾‾√⇒t2=2gh3a2then we have2ha=2gh3a2⇒a=g3a) acceleration is g3b) velocity after it falls through a distance h is 2gh3‾‾‾‾√Hope this information will clear your doubts about rotational motion.If you have any more doubts just ask here on the forum and our experts will try to help you out as soon as possible.Regards

ah what a good reason why not you give up a few years using the app and EVERY step towards the end and you will not have any such action as you are not opting out for the sake you can have to make the same kind as a SIMPLE one step at a risk that of the time the TAKEN place is in a WAY

use Gyeser require much more current to WORK than television...Fuse which ALLOW more current to pass MUST be used in gyeser ..IE,fuse of large Ampere.

a device that is a protective device which breaks the ELECTRIC circuit whenever NEEDED. it is a short wire and is CONNECTED to the LIVE wire. THANKS

Preparations(1) Improve your home’s earthquake resilienceEvaluate your home’s earthquake resilience, and improve it through steps such as fastening down furniture and putting anti-shatter coatings on glass windows.(2) Stockpile water and foodstuffsYou should have at least three days’ worth of drinking water and foodstuffs stockpiled. You should also have radios and flashlights prepared.(3) Participate in disaster trainingGet to know the people in your community better by getting actively involved in community disaster training.(4) Discuss disaster preparedness with your familyVerify how you will get in touch with each other and where the relief shelters are.2. What To Do After an Earthquake(1) The first two minutes after an earthquakeProtect yourself.Stay AWAY from furniture that could topple over, and hide under a desk or table. Do not panic and run outside.(2) Immediately following an earthquakePrevent fires and secure escape routes.Shut off gas valves and unplug electrical cords. If a fire breaks out, calmly begin to put it out. Secure escape routes by OPENING doors and windows.(3) The first three days following an earthquakeMake sure your family is safe, and watch out for aftershocks.Stay away from houses that have started to collapse. Call out to your neighbors, and depending on the situation, head for a shelter on foot.Assist neighbors with firefighting, rescue, and relief.Cooperate with your neighbors to put out fires and rescue and attend to the injured.Fend for yourself.Use the drinking water and food that you’ve stockpiled. Beware of false rumors and rely only on correct information.(4) From the fourth day onwardSurvival and RecoveryEven after four days, you should watch out for aftershocks. Stay informed. Work towards getting things back to normal.3. What To Do During an Earthquake(1) Stop driving.With a firm grip on the steering wheel, gradually reduce your SPEED, pull over to the left side of the road, and shut off the engine.Until the tremors subside, calmly assess your surroundings and use your car radio to stay informed.If you need to take shelter, leave your key in the ignition and the door unlocked. Taking your vehicle inspection papers and other important belongings with you, head for a shelter on foot.(2) On the RoadDon’t just stand there. Use a bag or something else to protect your head from falling objects such as glass and building signs, and seek shelter in an open area or park.Don’t get too close to cinder block walls or vending machines.Watch out for telephone poles that are about to fall over and dangling power lines.If there is no open space nearby, calmly assess your surroundings and move somewhere with a high degree of safety, away from buildings.(3) Near the ShoreIf you feel tremors, immediately seek the safety of high ground. Stay away from the shore until all tsunami alerts and WARNINGS are lifted.(4) On the TrainGrip the railing or hand strap tightly.Even if the train stops between stations, do not exit the train on your own through a window or door using the emergency door override.Calmly follow the instructions given to you by the conductors.

call the 2 or 3 equation of motion and SOLVE this QUESTION STEPWISE

cy means number of VIBRATIONS per second.Frequency = 100 HzSo 100 vibrations per second.in 1 MINUTE( or 60 seconds) , number of vibrations = 60×100 = 6000it vibrates 6000 times in a minute