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When wire is STRETCHED 3 times of its original length, its resistance will increase 9 times, because when length increases radius decreases i.e. area decreases. But volume i.e. area × length remains same . Let A1 & A2 be original and new AREAS and let l1 and l2 be original and new lengths A1×l1 = A2×l2 A1/A2 = l2/l1 Let R1 be original resistance and R2 be new resistance R=(resistivity × length )/area Taking RATIO of R2 to R1, (R2/R1) = (A1/A2) ×(l2/l1) Putting (A1/A2) = (l2/l1) (R2/R1) = (l2/l1))^2 If l2 = n × l1 R2/R1 = n^2 R2 = n^2 × R1 In general if length increased n times , resistance increases n^2 times. Resistivity is property of MATERIAL, it do not change with change in dimensions. Therefore resistivity will remain the same.pls mark me brainlist

(C) 10/3 NExplanation:

MATE!!Explanation:Frequency is the SPEED of the vibration, and this determines the pitch of the SOUND. It is only USEFUL or meaningful for musical sounds, where there is a strongly regular waveform. Frequency is measured as the number of wave cycles that occur in one second. The unit of frequency measurement is HERTZ (Hz for short).

tion:SINCE the ANSWER is small, I am not sending handwrittenSorryBut, The answer is 1st option.Answer is THETA = alpha.Thank you

Here is your ANSWER.

seriesparallel CIRCUIT electric cellsA resistor is an electrical component that limits or regulates the flow of electrical current in an ELECTRONIC circuit. Resistors can also be used to provide a specific voltage for an active device such as a transistor. ... Another type of resistor is made from winding Nichrome or similar wire on an insulating form.A few examples include DELIMIT electric current, voltage division, heat generation, MATCHING and loading circuits, control gain, and fix time constants.Disadvantages: 1. If one point breaks in the series circuit,the total circuit will break. ... As the number of components in a circuit increases ,greater will be the circuit resistance. Hope it helps pls mark me as brainliest l have answered your 5 questions rest l don't have any ideapls follow me

Hlo MATE here is ur answer. .EXPLANATION:Weight is 49 KG hope it helpspls mark as BRAINLIEST thanks my answer ❤

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activity 8.10 focuses again on the PLOT.you will get TWO DIFFERENT plot line on the same GRAPH for feroz and sania.

90°-8°Explanation:PLEASE MARK me as BRAINLIST

Velocity is a vector quantity....And so it has MAGNITUDE and DIRECTION..IT HAS DIRECTION....Explanation:YOUR DOUBT IS CORRECTED.....PLZ MARK ME BRAINLIEST....!

In this kind of Question, first we need to first draw the Free-Body Diagram of both the bodies and create the force equations.For 4 kg Block , we can say :For 2 kg Block , we can say :Adding the 2 Equations, we get :PUTTING value of acceleration in 2ND equation , we get :So final ANSWER :

tion:NUMBER of compression and RAREFACTION in 1 second = 1000Frequency,f=FREQUENCY is the number of oscillation PER seconds. In one osculation is composed of 1 compression and 1 rarefaction.So, the frequency of the sound wave is 1000 .Read more on Brainly.in - brainly.in/question/8197796#readmore

The value of ammeter 2&3 is-Explanation:Current is VOLTAGE divided by resistance. In parallel each resistance is connected to the SUPPLY voltage and the total current is the sum of the two. 6/3=2 for one plus 6/2=3 for a total of 5 amps. If the question is theoretical or the battery has 6 volts under load then this is the answer. However in practice batteries have internal resistance that will REDUCE the output voltage when load is added and so reduce the current output.PLZZ MARK AS BRAINLIST

e covered by car (s) = 24km in time (t) = 20minSpeed with which the Distance was covered (V).✪ CONVERT MINUTE into second✪ Convert km into metre____________________________________Speed of car is

because it is RED BLOOD CELL

ear ✔️✔️↙️↙️Solution. (a) Calculation of RESISTANCE. Here we KNOW the voltage and power of the BULB. So, the resistance can be CALCULATED by using the formula :I hope it's helps you...

Explanation:Now, let us use this Vernier calipers to measure the DIAMETER D of a marble ball (marble balls usually have D = 1/2 in). The measurement is shown in the figure 2. Here, xm0 is the distance between the jaw attached to main scale (left jaw) and the 0th mark on the main scale and xv0 is the distance between the jaw attached to Vernier scale (right jaw) and the 0th mark on the Vernier scale. Observe that the diameter is given by D = x m 0 + x where x is the distance between the 0th mark on the main scale and the right jaw. Now, note that the 7th mark on Vernier scale coincides with 1.9 CM on the main scale. This point is called the point of coincidence. The distance between the 0th mark on main scale and the point of coincidence is XM and the distance between the 0th mark on Vernier scale and the point of coincidence is xv. Thus, x + x v 0 + x v = x m SUBSTITUTE x from above equation into the first equation to get D = ( x m − x v ) − ( x m 0 − x v 0 ) The quantity ( x m 0 − x v 0 ) is called the zero error of the Vernier calipers. Negative of the zero error is called zero correction. Note that  x m 0 = x v 0 in a Vernier calipers without zero error (which is TRUE in this case). Also,  x m = 19 M S D = 19 mm and  x v = 7 V S D = 7 ( 9 / 10 ) = 6.3 mm. Substitute these values in above equation to get D = 12.7 mm =1.27 cm (half inch marble). Figure 2: Measuring Diameter of a Marble Ball There is another easier way to get the measured value. The main scale reading (MSR) is the first reading on the main scale immediately to the left of the zero of Vernier scale (MSR = 12 mm in this example). The Vernier scale reading (VSR) is the mark on Vernier scale which exactly coincides with a mark on the main scale (VSR = 7 in this example). Note that there are VSR divisions on the main scale between MSR mark (i.e., mark on the main scale immediately to the left of the zero of the Vernier scale) and the point of coincidence. Thus, x v = V S R × V S D , x m = M S R + V S R × M S D Corresponding values of the parameters for the zero errors are x v 0 = V S R 0 × V S D , x m 0 = M S R 0 + V S R 0 × M S D Substitute in the expression for D to get D = M S R + V S R × L C − Z e r o E r r o r where LC = MSD - VSD is called the least count or Vernier constant. It is the smallest length that can be measured accurately with a Vernier calipers. For the given Vernier calipers L C = M S D − V S D = 1 − 9 / 10 = 0.1 m m , D = M S R + V S R × L C = 12 + 7 ( 0.1 ) = 1.27 m m Note that Vernier calipers can be used to measure (1) outer dimensions like diameter of a sphere or edge of a cube (2) inner dimensions like inner diameter of a hollow cylinder and (3) depth of a hollow cylinder.

Hope so it is helpful.. PLS follow me.. Like.. Thankyou Explanation:CHANGES of state are physical changes in matter. They are REVERSIBLE changes that do not involve changes in matter's chemical makeup or chemical properties. COMMON changes of state include melting, freezing, sublimation, deposition, condensation, and vaporization.Mark me as BRAINLIEST as u promised..

e KNOW that the force is Kq1q2/r^2Keeping the charge constant, if we REDUCE the DISTANCE to r/root2 then the MAGNITUDE of force would become 2F.Hope it helps YA:)

I don't know who created Black Holes but it's THEORY was given bye STEPHEN Hawking.Explanation:Stephen Hawking explained then in his book,"A BRIEF HISTORY OF TIME"HOPE IT HELPS!!!!PLEASE MAKE IT BRAINLIEST ANSWER!!!!

where is the graph bro whereExplanation:sbshfnccm ckicjcndnx has x d SIX CDs sc a SN e d s hss अः अः अःषःष

Mass of the block m = 8.5kgForce F = 40N.θ = 20°Coefficient of friction μ =0.35Initial Velocity of block v = 3.6m/s.WORK DONE by force F, W = 200J.To Find:-a) The total distance moved by the blockb) The final velocity of the blockSolution:-a) Work Done by the force W = Fdcosθ200 = 40xdcos20°By solve we get d = 5.32mb)  From the free body diagram ( Find attached FIGURE) = Friction Force = μNthen , N = mg + FsinθN = 8.5x9.81 + θ0sin20°N = 97.06N = 0.35x97.06N = 33.973N = 40cos20° - 33.973 = 3.6146As per Newton's law = m x  acceleration(a)a = a = 0.4252m/s²We have v² = u² + 2asv² = (3.6)² + 2(0.4252)(5.32)        {s= d = 5.32}v² = 12.96 + 4.524128v² = 17.4841v = 4.181m/sec

tion:1. INCREASE with depthI am not SURE about my ANSWER

the RIGHT ANSWER is C)

(C) A convex lens of focal length 5 REASON : A convex lens GIVES a magnified image of an OBJECT when it is placed between the radius of curvature and focal length. ALSO, magnification is more for convex lenses having shorter focal length.Therefore, for reading small letters, a convex lens of focal length 5 cm should be used.HOPE IT HELPS...

6.5 km/hourExplanation:1800 MINUTES= 30 hourDistance = 195 KmSpeed = 195/30= 6.5 km/hour

1. (a) Spherical aberration in light microscopyThe curved surface of a lens is most often spherical (this shape is easy to make). When light refracts through a lens with a spherical surface, the rays that pass through the outer diameters of the lens will focus at a different point from rays that pass through the center. This causes the RESULTING image to be blurred.When light is refracted from the outer vs. inner portions of the curved surface of a spherical converging lens (A) or diverging lens (B), the resulting image is blurred along the optic axis (i–ii).The simplest method of reducing spherical aberration is to place an aperture, hole or "stop", in front of or after the lens. The aperture blocks out rays that blur the image. The disadvantage is, however, a greatly reduced light throughput of the lens.This is an objective from a microscope from the 1760s. The objective lens is at the bottom. To reduce spherical aberration, the manufacturer used the small aperture (black, left) so that only light that passes through the center of the lens would be used in image formation.(b) A parabolic (or paraboloid or paraboloidal) reflector (or dish or mirror) is a reflective surface used to collect or project energy such as light, sound, or radio waves. Its shape is part of a circular paraboloid, that is, the surface generated by a PARABOLA revolving around its axis. The parabolic reflector transforms an incoming plane wave traveling along the axis into a spherical wave converging toward the focus. Conversely, a spherical wave generated by a point source placed in the focus is reflected into a plane wave propagating as a collimated beam along the axis.2. According to principle of REVERSIBILITY of light, if the path of the light is reversed after suffering a number of reflections and refractions, then it retraces its path. This means that if a light RAY travels from medium 1 to medium 2 and has ANGLE of incidence and angle of refraction as i and r respectively, then if the light is incident from medium 2 at an angle r, then the angle of refraction in medium 1 will be i.it will help you and mark it as brainliest.

it will ALSO BECOME hotthis is the ANSWER.

About 80 percent of the ELEMENTS are METALS (SHINY elements that conduct heat and ELECTRICITY well), and 15 percent of the elements are nonmetals (poor conductors of heat and electricity). The remaining elements are METALLOIDS, which share properties of both metals and nonmetals.

MARK AS BRAINLIESTIf the sound frequency is increased above 10MHZ then it will IMPACT on BIOLOGICAL ISSUES .More sound pollution is increased.All will become deaf if they listen above 10MHz

Interference OCCURS when SEVERAL waves are added TOGETHER provided that the phase differences between them remain constant over the observation time. It is sometimes desirable for several waves of the same frequency and AMPLITUDE to sum to zero (that is, interfere destructively, cancel)MAKE it brainliest

F = -6.48×10^7 NExplanation:GIVEN, Q1 = +48 × 10^-6 C Q2 = -54 × 10^-6 C d = 6 × 10^-4 mF = 9×10^9 ×(48×10^-6)×(-54 × 10^-6 C)/36×10^-8F = 9×10^-3 x(48×-54)/36×10^-8F = -(648) × 10^5F = -6.48×10^7 NSince the charges are OPPOSITE,the force is attractive.

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In fluid DYNAMICS, Hydrostatic PARADOX speaks about the liquid PRESSURE at all the points at the same depth(horizontal level). It is defined as:“The pressure at a certain horizontal level in the fluid is proportional to the VERTICAL distance to the SURFACE of the fluid.“

dy is moving with same velocity and speed then the graph of the body WIL be LINEAR i.e STRAIGHT line .Plz mark this answer as BRAINLIEST