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had REFRACTED  TOWARDS NORMAL

d sound refers to a SENSATION CAUSED in the ear by the vibration of the SURROUNDING air or other medium. ... On the other hand the word voice refers to the faculty of speech in the humans. It is the sound produced in a person's larynx and UTTERED through the mouth, as speech or song.

as brainliest plz......120*5= 600600 WATTS are used by 5 fans in 1 HOUR....600*4 = 2400 2400 watts are used by 5 fans in 4 hours ..as we know. 1 kilowatt = 1000 watts electricity consumed by fans = 2.4 kilowatt / hours PLZZZZ mark it brainliest only if it helps

as brainliest plzMitosis is defined as the type of cell division by which a single cell divides in such a way as to produce two genetically identical "daughter cells". This is the method by which the body produces new cells for both growth and repair of aging or damaged tissues THROUGHOUT the body - as opposed to for sexual reproduction (when meiosis applies).MITOSIS is the simplest of the two WAYS (mitosis and meiosis) in which the nucleus of a cell can divide - as part of a process of whole cell division. The four stages of mitosis (prophase, metaphase, anaphase and telophase) are shown and described below.Interphase is not part of mitosis but is INCLUDED here as a reminder that interphase preceeds mitosis. (Hence, it has the number 0.)Chromatin is material in a cell nucleus CONSISTING of DNA and protein. This is the substance that chromosomes are made from. It can be stained with dyes in order to watch the process of mitosis using a microscope.

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your ANSWERPLEASE MARK it as BRAINLIEST ANSWER and THANK you

ot VALID as during B to C, we cannot go BEYOND TIMEPLEASE mark it as brainliest answer and THANK you

:Potential ENERGY = mass × acceleration DUE to GRAVITY × height .Given :mass = 50 kgacceleration due to gravity = 9.8 m/s^2height = 100 mPotential energy = m g h                              = 50 kg × 9.8 m/s² × 100 m                              = 490 J × 100                              = 49,000 JAnswer :The potential energy WOULD be 49,000 JThe total work done will also be 49,000 J

as I am solving this one by one.Bulb,=> 60 W = 60/100 Kw = 0.6 Kw=> Power of Bulb = Energy/Time => P = (0.6/8) Kwh => P = 0.075 Kwh => P = 10 x 0.075 = 0.75 Kwh Fan,=> 60 W = 0.6 Kw=> Power of Fan = Energy/Time=> P = (0.6/8) Kwh => P = 0.075 Kwh => P = 4 x 0.075 Kwh = 0.3 Kwh ACs,=> Power = Energy/Time=> P = (2/8) Kwh => P = 0.25 Kwh => P = 3 x 0.25 = 0.75 Kwh 1). Total Power = (0.75 + 0.3 + 0.75) Kwh = 1.8 Kwh 2). Total Power in 30 DAYS = ( 30 x 1.8) UNIT => Total Power = 54 unit 3). Total Electrical Energy = 54 unit 4). Total COST = Rs ( 4 x 54) => Total Cost = Rs 216 Be Brainly

n :-Why do we SEE during the day some things and not the same at night ?ANSWER :-There are VARIOUS types of receptors in our body which convey the impulses from the surroundings to the brain.The RECEPTOR in the eye are called the photoreceptors.They include two types of cells present in the eye called rods and cones.Rods enable us to see things in the dark and it is very sensitive to low LEVELS of illumination.On the other hand we have cones that helps us to perceive colour.Hence there are different types of cells which function differently during the night and the day.At night , only the rods function while during day the cones function.Thus we see differently at day and night.

is SUFFERING from Hypermetropia.(CAUSES)1) EITHER focal length of eye lens is too long, or 2) SHORTENING of eyeball due to some genetic defect. (Diagram)For defective eye - NCERT BOOK - PAGE - 190. fig(a)For CORRECTION - fig. (c)Converging lens are convex lens as they converge the rays.focal length f = 15cm = 0.15mpower p = 1/f = 1/0.15 = 6.6Dfocal length of another f' = 30cm = 0.3mpower p' = 1/f' = 1/0.3 = 3.3DPower after combination = 6.6 + 3.3 = 9.9D

n :-What will be k.E of a body when it reaches at its maximum height ?Answer :-The KINETIC energy will be zero .Reasons :-As a body is thrown upwards , the potential energy of the body starts increasing as it GAINS a CERTAIN amount of height.Infact potential energy increases with increase in height since it is directly proportional to height.The total mechanical energy is however conserved.Thus the kinetic energy has to decrease.K + U is always constant.When the body reaches maximum height , the value of U is maximum and hence here K is minimum and is equal to zero.Also at the maximum height the velocity becomes zero for a moment before it again FALLS BACK to the Earth.Therefore kinetic energy is zero at the maximum height .

what's your QUESTION.

ing a magnetic BALL by a string on the same POLE as the magnetIf the ball rotates in a CONSTANT VELOCITY then the magnetic field emitted by the magnetic bar is UNIFORM

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no 2 is RIGHT ANSWER

00jmass=900gmwork = mxgxh9800=0.9kgx9.8xh9800/0.9x9.8=10000/9=1111.11m

Princeton, New JERSEY, U.S. listen); 14 March 1879 – 18 April 1955) was a German-born theoretical physicist who developed the theory of relativity, ONE of the two pillars of modern physics (alongside quantum mechanics). His work is also KNOWN for its INFLUENCE on the philosophy of science.

Voltage X CurrentCurrent = POWER / Voltage CURRENT = 100/220 = 0.45 APLEASE mark as Brainliest

the LARGEST STAR in MILKY WAY GALAXY

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hapes of the MOLECULES     2)The BOND ANGLES of the          molecules

rsion is a normal change in an ATMOSPHERIC property=>>The temperature at which a real gas shows no Joule Thompson effect is mainly CALLED a inversion temperature .=>>The inversion temperature in thermodynamics and cryogenic is the critical temperature ..=>>All the gases in reality that is EXPANDING at constant ENTHALPY will experience a temperature decreases .THANKS....

ent resistanceED and AC are in parallel .1/R = 1/30 + 1/30= > 1/R = 2 × 1/30= > 1/R = 2/30= > 1/R = 1/15= > R = 15Now this 15 is SERIES with BCR = 15 + 15   = 30This 30 is again parallel with AB1/R = 1/30 + 1/15= > 1/R = ( 1 + 2 ) / 30= > 1/R = 3 / 30= > R = 30/3= > R = 10Equivalent resistance = 10OHM's law :V = I R= > I = V/RGiven :V = 3 VI = 3 v / 10 ohm  = 0.3 AANSWER :0.3 A is the current flowing !

n :-By how MANY times does doubling the diameter of a wire and making it 10 times longer increase its resistance  a) 2.5 times  b) 5 times  c) 10 times  d) 30 times ANSWER starts By relation :R = p L / aFor a wire :R = p l / π r²where r is the radiusLet d be the diameter .d = 2 rr = d/2r² = d²/4= > R = p l / ( π d² / 4 )Observations from the relation :If diameter is doubled , then resistance will decrease to one-fourth.This is because Resistance is inversely proportional to square of diameter.If length is increased by 10 times then the resistance also increases 10 times as length is directly proportional to resistance .Thus NEW resistance will increase 10 times as well as decrease to one fourth .So over all it increases 10/4 times                                     = 2.5 timesANSWER :-OPTION A

there is no potential applied when no CHARGE FLOWS because V is directly PROPORTIONAL to I

in the dark room there is no light and THUS the Light do not reflects from the OBJECTS and we can not preview light. As a RESULT., we cannot see our even if we see in the MIRROR.

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es at HIGHER temperatures have more ENERGY, thus they can VIBRATE faster. Since the molecules vibrate faster, sound waves can travel more quickly. The speed of sound in ROOM temperature air is 346 meters per second. Speed of light is DIRECTLY proportional to the sqrt.

the DIAGRAM of REFLECTION

on current is a current in a semiconductor CAUSED by the DIFFUSION of charge.Drift current is the current that is a RESULT of an APPLIED electric field.✔✔I HOPE IT HELPS YOU✔✔

n :-Illustrate the energy changes which occur when a stone of mass m is dropped freely fall from HEIGHT h______________________Formulas :Potential energy U = mghKinetic energy K = 1/2 mv²Total energy = K + UAt AU = mghK = 0 since v = 0Total energy = K + U                      = mgh + 0                      = mghAt BU = m g hh = h - xU = mg ( h - X )K = 1/2 m v²By LAWS of motion:v² = 2 gh= > v²= 2 gxK = mgxK + U = mg( h - x ) + mgx          = mgh - mgx + mgx          = mghAt CK = 1/2 m v²   = 1/2 m × 2 gh [ v² = 2 gh ]   = mghU = 0 since h = 0Hence K + U = mgh + 0                      = mghObservations :In all cases ,K + U = mghThere fore the total mechanical energy remains constant.This verifies the Law of Conservation of Energy.__________________________________________

= ANGLE r because of LAW of REFLECTION so ,its angle of refection is ALSO be of 60

of an OBJECT on the surface of earth is just the FORCE exerted by the object on earth.We know that F = ma So, Weight = m × a=> weight = m × g (g = acceleration due to gravity)For CALCULATING weight in NEWTON, the mass should be in kg and the acceleration should be in m/s²Given mass = 1 gram = 0.001 kg Taking g as 10 m/s² we get, weight = 0.001 × 10=> weight = 0.01 Newton. Or taking g as 9.8 m/s², we getweight = 0.001 × 9.8=> weight = 0.0098 Newton.

ritten on the BITH SIDES of MAGNET

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