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t case rajan STARTS from rest and gains 600 m/s velocity in 30 seconds. u = 0v = 600 m/ST = 30 sa = v-u/t (or u can use 1 st equation of motion v=u+at) = 600-0/30 = 600/30 = 20 m/s²In the SECOND case rajan's speed decreases from 600 m/s to 400 m/s in 5 seconds. u = 600 m/sv = 400 m/st = 5 sa = v-u/t = 400-600/5 = -200/5 = -40 m/s² (-ve SIGN indicates that it is performing RETARDATION)

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The pressure inside a liquid at the same DEPTH will be equal and the liquid pressure differs with the height of the liquid. Here, the points B and C in the WATER tank LIE at the same depth and hence have the same pressure when water is allowed to FLOW out.Hope it help you. Thanks

tion:A FORCE may cause an OBJECT to turn about a PIVOT. The turning effect of a force is CALLED the MOMENT of the force. Moments act about a pivot in a clockwise or anticlockwise direction. The anticlockwise moment acts downward on the left, and the clockwise moment acts downwards on the right.●HOPE it will help u!!

tion:A force may cause an object to turn about a pivot. The turning EFFECT of a force is CALLED the moment of the force. MOMENTS act about a pivot in a clockwise or ANTICLOCKWISE direction. The anticlockwise moment acts downward on the left, and the clockwise moment acts downwards on the RIGHT.

tion:A force may cause an OBJECT to TURN about a pivot. The TURNING EFFECT of a force is called the moment of the force. Moments act about a pivot in a clockwise or anticlockwise direction. The anticlockwise moment acts downward on the LEFT, and the clockwise moment acts downwards on the right.

Connect up the circuits in the diagrams. Use the results to answer the questions. Which circuit has the brighter globe? Why do you think this OCCURS?Which circuit has the brighter globe(s)? Why do you think they are brighter?Which circuit has the brighter globes? Why do you think this happens?How do you think the amount of electricity FLOWING in a circuit is affected by the number of batteries (see Question 2) and by the number of globes (see Question 3)? You could connect an ammeter (which measures current) in the circuit to CHECK your ideas.How is the SPEED of an electric motor affected by the number of batteries in the circuit?Try these two circuits. If you wanted to light up two globes as brightly as possible using one battery, which is the better way to do it?  PREDICT which of each pair of circuits in the diagram will have the brighter globes. Construct these circuits and find out if your predictions were correct.

Question :- A car travels a distance d on a STRAIGHT road in two hours and then returns to the starting point in next three hours. What is the average SPEED. Given : A car travels a distance d on a straight road in two hours and then returns to the straight point in next three hours. To Find :- What is the average speed of a car. Formula Used :- Average Speed Formula :Solution :-First, we have to find the total distance travelled : A car travels a distance d on a straight road. Again, after TRAVELLING d distance its returns to the straight point. HENCE, the total distance travelled is :Now, again we have to find the total time TAKEN : A car travels a distance d on a straight road in 2 hours. Again, the time taken to return the car in a initial position is 3 hours. Hence, the total time taken is :Now, we have to find the average speed of a car :Given :Total distance travelled = 2dTotal time taken = 5 hoursAccording to the question by using the formula we get,Hence, the correct options is option no (b) 2d/5.

Velo = 3 m/s,    DISPLACEMENT =25m  accln = 4 m/s²Explanation:x(t) = 2t² - 5t -6V = dx/dt = 4t -5a = dx²/dt² = 4a) velocity at 2 SEC = [dx/dt] at t =2                                = 4x2 - 5                                = 3 m/sb) Position when t = 0 is    x₀ = -6 m   Position when t= 5 s    x₅ = 2x 25 - 5x5 -6         = 50-25-6         = 19 m∴ Displacement in 5 sec = x₅-x₀                                          = 19-(-6)                                           = 25 mc) accln of body is constant, a = 4 m/s²

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42°CClinical THERMOMETER is used to MEASURE the BODY temperature. The scale of temperature is graduated from 35°C to 42°C and or from 94°F to 108°F. The temperature of human body always REMAINS within this range and this is the range on the clinical thermometer.

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tion:Bernoulli's equation tells us that when velocity INCREASES, the pressure (that the fluid EXERTS on its walls) decreases. Poiseuille's equation says that the flow rate Q is directly PROPORTIONAL to the pressure gradient (P1 - P2).

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tion:AnswerWe know that β is the coefficient of volumetric EXPANSION and α is the coefficient of linear expansion.Let us now consider a cube with dimensions l,b,h as the length breadth and height respectively. Let V be its volume. Let the initial temperature be T 1 . NEXT let's change the temperature from T 1 to T 2 . The cube will undergo expansion. Let the dimensions before expansion be l 1 ,b 1 ,h 1 ,V 1 and the dimensions after expansion be l 2 ,b 2 ,h 2 ,V 2 for length, breadth, height and volume respectively.From linear expansion theory we have,l 2 =l 1 (1+α△T),b 2 =b 1 (1+α△T) andh 2 =h 1 (1+α△T).The volume of the cube after expansion is GIVEN by,V 2 =l 2 ×b 2 ×h 2 Using the values of l 2 ,b 2 ,h 2 in the volume equation we have,V 2 =l 1 (1+α△T)×b 1 (1+α△T)×h 1 (1+α△T)⇒V 2 =(l 1 ×b 1 ×h 1 )(1+α△T) 3 Now the volume of the cube before expansion is given by V 1 =l 1 ×b 1 ×h 1 Using this,⇒V 2 =V 1 (1+α△T) 3 EXPANDING (1+α△T) 3 as (a+b) 3 =a 3 +b 3 +3a 2 b+3ab 2 we have,⇒V 2 =V 1 [1+3α△T+3(α△T) 2 +(α△T) 3 ]Now the value of 3(α△T) 2 +(α△T)≈0∴V 2 =V 1 (1+3α△T)⇒V 2 =V 1 +3V 1 α△Tor, V 2 −V 1 =3V 1 α△TNow V 2 −V 1 is nothing but the change in volume, △V.∴△V=3V 1 α△Tor, V 1 △T△V =3αor, β=3α as β= V 1 △T△V HENCE, proved.

Direct current is one-directional flow of electric charge. An electrochemical CELL is a prime example of DC power. Direct current may flow through a conductor such as a wire, but can also flow through semiconductors, insulators, or even through a VACUUM as in electron or ion beams. ..I HOPE it May HELPFUL to you ...

n(1) Total RESISTANCE (R) can be calculated as shown below.1/R = 1/R₁ + 1/R₂ + 1/R₃1/R = 1/100 + 1/50 + 1/5001/R = ( 5 + 10 + 1 )/5001/R = 16/500500/16 = RTotal Resistance (R) = 500/16 ΩR = 31.25 Ω(2) According to ohm’s law the current through a conductor between two points is directly proportional to the voltage across the two points.V ∝ I or V = IRR is constant called resistance.R = V/I500/16 = 220/II = 220 × (16/500)I = 7.04 ATherefore, the resistance of the electric IRON is 31.25 Ω and the current flowing through it is 7.04 A.

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7500mExplanation:1km=1000m7.5km=7500m

n: Pressure is PER unit thrust on a surface, HENCE pressure is directly PROPORTIONAL to thrust. GREATER the thrust, greater is the pressure and smaller the thrust, smaller is the pressure.

:-Range of the BALL is 55 metres .Explanation :-We have :-→ Velocity of projection = 29.4 m/s→ Height of pole = 4.9 m________________________________From the FORMULA of maximum height of a projectile, we have :-H = u²sin²θ/2g⇒ 4.9 = [(29.4)² × sin²θ]/2(9.8)⇒ 4.9 = [864.36 × sin²θ]/19.6⇒ 864.36 × sin²θ = 19.6(4.9)⇒ sin²θ = 96.04/864.36⇒ sin²θ = 1/9⇒ sin θ = 1/3⇒ sin θ = 0.33We have sin θ = 1/3 , now solving for COS θ, we get :-⇒ cos θ = √8/3⇒ cos θ = 0.943________________________________Now from the formula of range of a projectile :-R = u²sin2θ/g⇒ R = u²(2sinθ)(cosθ)/g⇒ R = (29.4)²(2 × 0.33)(0.943)/9.8⇒ R = (864.36)(0.66)(0.943)/9.8⇒ R = 537.96/9.8⇒ R = 54.9 ≈ 55 m

Stopping POTENTIAL depend upon FREQUENCY of incident LIGHT. ... The frequency is known as threshold frequency. Work function is the CHARACTERISTIC of a photosensitive material. The stopping potential depends on the frequency of the incident light and not on the intensity.make me brilliant

oncave mirror, IMAGE size is same as the object size when it is placed at the CENTER of curvature. Since radius of the mirror is TWICE the focal length, center of curvature lies at a DISTANCE of 30 CM from the pole. Hence, an object kept at 30 cm will produce an image of the same size as that of the object.

Pushing a heavy block to DISPLACE it from its ORIGINAL position. Pushing a trolley. EXAMPLES of pulling: DRAWING a bucket of water from a wellhope it is help FULL

Lorentz force: Fˉ =Q( vˉ × Bˉ )For a wire carrying chargesFˉ =I∫dt× Bˉ ∴∣F∣=BILper unit lengthNow, Force between two CURRENT carrying conductor if carries in same line/direction ∴ ATTRACTIVE force; F= 2πdBi 1 i 2 distance between

and fir mummy NE mu par pani DAL kal do TEEN kantap lga kar sare mood ki aisi ti taisi kardi By the way good ONE of yours agar chepa NHI khi se to

the ANSWER is in the IMAGE

wable ResourcesNonrenewable ENERGY RESOURCES include coal, NATURAL gas, oil, and nuclear energy.

Electric field is DESCRIBED as the amount of force PER CHARGE while the Electric POTENTIAL is described as the amount of energy or work per charge. ... Electric field is a vector quantity while Electric potential is a scalar quantity.