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VECTOR

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The answer is a OPTION B

ong>Answer:

A stone thrown vertically upwards with an initial velocity 30 METRE per SECOND comes to a stop in 5 s. Find the retardationoptions are: 6 metre per se … cond square- 6 metre per second square5 metre per second square-5 metre per second square when a vector is multiplied by ASCALAR the RESULTANT is

Explanation:

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ong>ANSWER:

The anomalous EXPANSION of water is an abnormal property of water whereby it expands INSTEAD of contracting when the temperature goes from 4o C to 0o C, and it becomes less dense

Explanation:

ong>ANSWER:

The slope of a position-time graph represents velocity. The steeper the slope is, the faster the motion is changing. AVERAGE velocity can be calculated from a position-time graph as the CHANGE in position divided by the CORRESPONDING change in time.

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Explanation:

ong>ANSWER:

-3.6m/s²

Explanation:

INITIAL velocity of the bus(u)=36m/s

Final velocity of the bus(v)=0m/s

Time taken to STOP the bus(t)=10sec

acceleration = (v-u)/t

= (v-u)/t =(0-36)/10

= (v-u)/t =(0-36)/10 = -36/10

= (v-u)/t =(0-36)/10 = -36/10 = -3.6

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ong>Answer:

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ACCLERATION will be 1.6 *10^-2m/sec^2

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Answer:

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Explanation:

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ong>Explanation:

Dyne, unit of force in the CENTIMETRE-gram-SECOND system of physical units, equal to the force that would give a free mass of one gram an acceleration of one centimetre PER second per second.

energy is the quantitative property that must be transferred to an object in order to perform work on, or to heat, the object. Energy is a conserved quantity; the law of conservation of energy states that energy can be CONVERTED in FORM, but not created or destroyed

speed

and it is SCALAR QUANTITY

ong>Answer:

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Explanation:

DISPLACEMENT is the shortest distance TRAVELLED from the initial point to the final point. After half revolution the displacement is the length of the diameter which is equal to 2r. Hence the displacement is 2r.

ong>Explanation:

For example, displacement, velocity, and acceleration are vector QUANTITIES, while speed (the magnitude of velocity), time, and MASS are scalars. To QUALIFY as a vector, a QUANTITY having magnitude and direction must also obey certain rules of combination

ong>Answer:

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ong>Answer:

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20 OHM

STEP by step explanation

1/R = 1/2+ 1/2 +1/2 +1/2 +1/2+ 1/2 +1/2 +1/2+ 1/2 +1/2= 10/2 = 5

1/R = 5

R = 1/5 ohm

56km /H

Explanation:

112/2=56km/ h

so,the average speed is 56km/h

ong>ANSWER:

a)

v=0+9.8×2

v=19.6m/s^2

Explanation:

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ong>ANSWER:

ANTICLOCKWISE

EXPLANATION:

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ong>Answer:

This phenomenon usually occurs in mirrors. This phenomenon usually occurs in LENSES. Reflection can simply be defined as the reflection of light when it strikes the MEDIUM on a plane. Refraction can be defined as the process of the shift of light when it passes through a medium leading to the BENDING of light.

Explanation:

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ong>Answer:

your answer is 180 miles

Explanation:

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ong>Answer:

The AMPLITUDE of a wave is the height of a wave as measured from the highest point on the wave (peak or CREST) to the LOWEST point on the wave (TROUGH). Wavelength refers to the length of a wave from one peak to the next. The amplitude or height of a wave is measured from the peak to the trough.

ong>ANSWER:

case first P1 EQUALS to 2.5 gwt CM -2 KE second p225 gw2 CM -2 third P3 equals to 10 give WTC -2

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ong>Answer:

Consider an object moving along a straight line with INITIAL velocity u and uniform acceleration a. ... 8.19, its velocity-time graph is straight line. Here OA = ED = u, OC = EB = v and OE = t = AD.

C is WRITE answer

Explanation:

18m/s,8km/m,64m/h

ong>Answer:

Will a day COME when India’s poor can access government services as easily as drawing cash from an ATM? . . . [N]o country in the world has made accessing education or health or POLICING or dispute RESOLUTION as easy as an ATM, because the nature of these activities requires individuals to use their discretion in a positive way. Technology can certainly facilitate this in a variety of ways if it is seen as one part of an overall approach, but the evidence so far in education, for instance, is that just adding computers alone doesn’t make education any better.

The dangerous illusion of technology is that it can create stronger, top down accountability of service providers in implementation-intensive services within existing public sector organisations. One notion is that electronic management information systems (EMIS) keep better track of inputs and those aspects of personnel that are ‘EMIS visible’ can lead to better services. A recent study examined attempts to increase attendance of Auxiliary Nurse Midwife (ANMs) at clinics in RAJASTHAN, which involved high-tech time clocks to monitor attendance. The study’s title says it all: Band-Aids on a Corpse . . . e-governance can be just as bad as any other governance when the real issue is people and their motivation.

ong>ANSWER:

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Explanation:

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ong>ANSWER:

lonic compound SOLUBLE is AIR PURIFIER

ong>Answer:

-0.5 m/s²

Explanation:

given,

v = 0 m/s  (since the car COMES to rest)

u = 10 m/s

t = 20 seconds

ACCELERATION = (v-u)/t

= (0-10)/20

= -1/2

acceleration = -0.5 m/s²

We know that, negative acceleration is also KNOWN as deceleration or retardation.

THEREFORE,

deceleration/retardation = 0.5 m/s²

ong>Answer:

ALCOHOL, MUSTARD OIL, honey

Explanation:

alcohol is a volatile LIQUID. Mustard oil EVAPORATION after reaching certain temperature. Honey is much denser.

ong>Explanation:

Looking at the PERIODIC table, the nonmetals are LOCATED on the right side of the table (except Hydrogen which is the first block on the top LEFT)....

ong>Answer:

1)Action of HEAT on copper sulphate crystals

Action of heat on copper sulphate crystalsThe crystals are converted to a powdery substance. The crystals lose their BLUE coloration on further heating. Steaming vapours are produced inside the tube which condense near the mouth of the tube to form a colourless liquid.

2)Action of heat on copper sulphate crystalsThe crystals are converted to a powdery substance. The crystals lose their blue coloration on further heating. Steaming vapours are produced inside the tube which condense near the mouth of the tube to form a colourless liquid.The blue coloured copper sulphate crystals turns white due to the loss of water MOLECULES . When copper sulphate is heated , it looses water molecules and hence it looses blue colour . On heating , FERROUS sulphate crystals lose water and anhydrous ferrous sulphate (FeSO4) is formed .

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Explanation:

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ong>ANSWER:

BUOYANT force is acting on submerged object

and DIRECTION is always VERTICALLY upward

ong>Answer:

CILIARY MUSCLE: A circular muscle that relaxes or tightens the zonules to enable the lens to change shape for focusing.

The zonules are fibers that hold the lens suspended in position and enable it to change shape during accommodation.

Ciliary body and the attached suspensory ligament change the shape (flattened or round) of the lens through RELAXATION and contraction of ciliary muscles and thereby the focal length to focus on the distant and near object. Contraction of ciliary muscles RELEASES the suspensory ligaments and allow the lens to become round (convex) while relaxation of these muscles makes the lens taut. Since ciliary muscles are involved in accommodation required for close vision, loss of their contraction would not cause loss of vision but would affect the close vision only. The amount of light entering retina is controlled by the iris.

Explanation:

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ong>EXPLANATION:

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there will be no change in acceleration

Explanation:

F= ma

a=F/m

if F and M are TRIPLED then a=3F/3m

which is EQUAL to F/m

therefore there is no change in acceleration

ong>Answer:

Which will fall faster and why? How will your observation be different if they are released SIMULTANEOUSLY in vacuum? When a bunch of feathers and a stone of the same MASS are released simultaneously in air, the feathers will fall after the stone falls due to air friction.

Here, m = 1200kg, a = -1.7m/s^2, F = ?

F = ma

F = 1200 (–1.7)

N = -2040 N

Negative sign indicates that FORCE is OPPOSING the motion of the vehicle.

FORCE will be 1/4 TIMES

ong>Answer:

A/q to me ( c) the correct answer 4 UR GIVEN QUESTIONS

A

Explanation:

this is RIGHT answer

(D) 56/26 Fe

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ong>Answer:

It is directly proportional to the length and inversely proportional to diameter. When the conductor is STRETCHED, the diameter DECREASES and the length increase increasing resistivity. So the resistivity will also triple.Feb 22, 2018

Explanation:

When the length becomes 2l, cross-sectional area reduces to A/2 because volume of the wire does not change. ... CHANGES RESISTANCE, R′=ρ(2l)(A/2)=4ρlA=4R.

ong>Explanation:

Given parameters

Time taken (t) = 5 sec

Initial velocity (U) =18 km/hour

u=18×100060×60s

u = 5 m/s

Final velocity (v) =36km/hour

v=36×100060×60s

v =10 m/s

We need to calculate acceleration and distance traveled

We KNOW that

acceleration a = (v – u)/t

Substituting the given values in the above equation we get,

a = (10 – 5)/5

a =5/5

a = 1 m/s2

We know that distance TRAVELLED is calculated by the formula

Distance travelled S = u t + (1/2) a × t2

Substituting the given values in the above equation we get,

S = 5 × 5 + (1/2) × 1 × 52

S = 25 + (1/2) × 25

S = 25 + 12.5

S = 37.5 m

Hence

acceleration a =1 m/s2

Distance travelled S =37.5 m

is the FORCE p = kx/2 ? I am not sure about this