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tion:Light which comes from the point at the top of the flame GOES straight towards the bottom of the screen. ... This leads the formation of an INVERTED images. If we increase the size of the hole of PINHOLE CAMERA, we get blurred image on the screen.

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The specific latent heat of a substance is the amount of ENERGY needed to change the STATE of 1 kg of the substance without changing its TEMPERATURE. ... latent heat of fusion (the amount of energy needed to freeze or MELT the substance at its melting point)

BExplanation:f = m X aif f is fixeda INCREASES as mass decreasesso LIGHTER biker biker1 ACCELERATES faster

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the Earth observing missions use sun-synchronous SATELLITES in low near polar orbits (NOAA polar orbiting meteorological satellites, LANDSAT, SPOT, ERS, .How many polar satellites are there?two polarThe two polar orbiting satellites, in their north-south orbits, observe the same spot on the Earth twice daily, once during the daylight and once at night. Polar orbiting satellites provide imagery and atmospheric soundings of temperature and moisture data over the entire Earth.What is the difference between polar and geostationary satellites?Satellites with polar orbits are used for monitoring the weather, military APPLICATIONS (spying) and taking images of Earth's surface. Geostationary satellites take 24 hours to orbit the Earth, so the satellite APPEARS to remain in the same part of the sky when viewed from the ground

understand!Explanation:it is SAID thaat if a ball moves in the speed of 3 m/s inside a pipe which is already MOVING in the speed of 4 m/s.

━━━━━━━━━━━━━━━━━━━No, resistance of a conductor doesn'tdepends on VOLTAGE and current. It is a PROPORTIONALITY constant. It depends on three factors, resistivity of the MATERIAL, length of the conductor and area of cross SECTION. So as temperature of the conductor increases, resistancealso increases.━━━━━━━━━━━━━━━━━━━━━━━━━━

tion:A switch in the electrical CIRCUIT is ALWAYS connected to the live wire so that the socket/appliance is not live when it is switched off. A fuse is USUALLY a thin PIECE of wire that will melt and break the circuit if too large a current flows through it.

we KNOW that, F = MG F = 10× 10F=100N

nts OCCUR in the response DUE to sudden CHANGE in the sources that are applied to the electric circuit and / or due to switching action. ... The TRANSIENT part occurs in the response of an electrical circuit or network due to the presence of ENERGY storing elements such as inductor and capacitor.Hope it helps you☺️

n :Calculate the WORK done by a student  in a book of 0.2 kg from the table and keeping it in shelf of 2 meters of height ​?Solution :★ ═════════════════════ ★Gravitational Potential Energy (P) :          It is the energy stored in an object due to it's height above the earth .➠ P = mgHwhere ,m denotes mass of the object g denotes acceleration due to gravityH denotes height of the object from the earth's surface★ ═════════════════════ ★Work (W) : It is defined as product of component of force in the direction of displacement .Here , work done to move an object from ground to a shelf of 2 m is equals to gravitational potential energy . Note : UNITS of both work done and potential energy are equal ( JOULES )Mass of the book (m) = 0.2 kgHeight (H) = 2 mAcceleration due to gravity (g) = 9.8 m/s²Work done (W) = ? J➠ W = F × H ➠ W = (ma) × H   [ ∵ F = ma ]➠ W = m × g × H  ➠ W = 0.2 × 9.8 × 2➠ W = 3.92 J

☑ because ACCELERATION ALSO TAKES PLACE.

One end of a CYLINDRICAL rod is KEPT in STEM chamber and the other end in meting ICE. Now 0.5 gm of ice melts in 1 sec. If the rod is replaced by another rod of same length , half the diameter and double the conductivity of the FIRST rod, then RATE of melting of ice will be

If a body starts from rest and moves with uniform acceleration, then the displacement of the body is DIRECTLY proportional to the CUBE of the TIME.Explanation:Initial VELOCITY of the body U = 0 Let the constant acceleration be a. S = ut + 1/2 * a * t ^ 2 Displacement of the body S = ut + S = 0 + 1/2 * a * t ^ 2 S = (a * t ^ 2)/2 We get S = Thus, displacement of the body is directly proportional to the square of the time.

fication is the process of POWERING by ELECTRICITY and, in many contexts, the introduction of such POWER by changing over from an earlier power source. ... This included the transition in manufacturing from line shaft and BELT drive using steam engines and water power to electric MOTORS.

systusfdih we CHOOSE because of the II

tion:1. Velocity of HAMMER, v = 6.26 m/s2. KINETIC energy, E = 19.59 JExplanation:It is given that,Mass of the hammer, m = 1 kgHeight, h = 2 m(1) Let v is the velocity of hammer. It can be calculated using conservation of energy as :v=\sqrt{2gh}v= 2gh v=\sqrt{2\times 9.8\times 2}v= 2×9.8×2 v = 6.26 m/s(2) Let E is the kinetic energy of the hammer just before it touches the GROUND. It is given by :E=\dfrac{1}{2}mv^2E= 21 mv 2 E=\dfrac{1}{2}\times 1\times (6.26)^2E= 21 ×1×(6.26) 2 E = 19.59 J

tion:the thin layer of MATERIAL covering the earth's surface and is FORMED from the weathering of ROCKS. It is made up mainly of mineral PARTICLES, organic materials, air, water and living organisms

sistivity of an exceedingly good electrical conductor, such as hard-drawn copper, at 20° C (68° F) is 1.77 × 10-8 ohm-metre, or 1.77 × 10-6 ohm-centimetre. At the other extreme, electrical INSULATORS have resistivities in the RANGE 1012 to 1020 ohm-metres.

oment of inertia of cone about the AXIS shown in figure is = 3/10mR squareHere, R= radius of conem= mass of coneWhen the particle is at apex it has no moment of inertia about axis of rotation .When the particle is at the base of cone it has a moment of inertia which is equal to m/s SQUARE.So, INITIALLY the moment of inertia of system is II = 3/10mR square+0= 3/10mR squareFinally the moment of inertia of the system I f =3/10mR square+mR square =13/10mR squareSo according to CONSERVATION of angular momentum I iw=I fw'⟹ω'= I'i/ If w ω'=(3/10)mR square/(13/10)mR square⟹ω =3w'/13

The ELECTRIC dipole moment is a measure of the SEPARATION of positive and NEGATIVE electrical charges within a SYSTEM, that is, a measure of the system's overall polarity.

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(B) ebonite rod RUBBED with FUR.Explanation:An Ebonite rod is rubbed with fur : Fur loses electrons and ACQUIRES positive CHARGE.

Significant figure of A NUMBER are digits that carry MEANINGFUL contribution to it's measurement RESOLUTION. rules1.all no zeros are significant. 2. zeros between two NON zeros ate significant. 3. terminal zeros are not significant without a decimal POINT. 4. terminal zeros are significant after a decimal point.

components cancel.From A:kq/r^2 COS 60 in POSITIVE x directionFrom C:kq/r^2 cos 60 in positive x directionSo save time:E = 2kq cos60/r^2ChanzApr 13, 2016ABC is an equilateral TRIANGLE of side 0.03m charges of +5nc ,+3nc and +5nc

wer:Given that,mass = m = 20 kginitial velocity = u = 40 m/sFinal velocity = v = 50 m/sTime taken = t = 2 sWe know that,a = (v - u)/tPutting the values given in the question,a = (50 - 40)/2→ a = 10/2→ a = 5 m/s²We know that,s = ut + (1/2)at²Putting the values given in the question,→ s = (40 * 2) + (1/2)(5 * 2²)→ s = 80 + 10→ s = 90 MWE know that,F = maPutting the values given in the question,→ F = 20 * 5→ F = 100 NWe know that,W = F s cos∅where W is WORK done, F is force, s is displacement and ∅ is the angle between force and displacement. Considering the force and displacement are in same direction, ∅ = 0°.→ W = 100 * 90 * cos0°→ W = 9000 J = 9 kJ ANS.2nd answer:Given that,mass = m = 35 kginitial height = h₁ = 4 mFinal height = h₂ = 12 mWe can consider any point to be a reference point and SAY that the gravitational potential energy (GPE) at that point will be 0. The GPE at any other point will be calculated in reference to the reference point. We know that,GPE = mghwhere m is the mass, g is the acceleration due to gravity, and h is the displacement between where the object is and the reference point. Considering the ground level to be reference point,Initial GPE = mgh₁Final GPE = mgh₂Then, change in GPE = mgh₂ - mgh₁Putting the values given in the question,→ ∆GPE = mg(h₂ - h₁)→ ∆GPE = 35 * 10 * (12 - 4)→ ∆GPE = 35 * 10 * 8→ ∆GPE = 2800 J = 2.8 kJ Ans.

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12.5 %Step-by-step explanation:Rate of chairs = 400 PER chairtotal chairs bought = 24Cost Price of chairs = 24 X 400 = Rs. 9,600Selling Price of Chairs = Rs. 10,800Since, SP > CPTherefore, its a PROFIT/Gain of = SP - CP = Rs. (10800 - 9600) = Rs. 1200Now, Profit % = (Profit÷CP) X 100 = (1200÷9600) X 100 = 0.125 X 100 = 12.5 %

tion:1. ACCELERATION is dimensionally represented as [M0 L1 T-2]2.DIMENSIONAL Formula of Kinetic ENERGY= M1L2T-23.Volume = LENGTH x Breadth x Height Volume = L x L x L Volume = L3. So Dimensional Formula of Volume = [M0 L3 T0] SI unit of Volume is m34. dimensional formula of work .... M L2 T−2