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EXPLANATION:

a= F/m

or,a= 15/5=3 m/s^2

t=v-u/a=3/3=1 SECOND

ANSWER:

MAGNETISM will be MAGNITUDE

Answer:

Derive an EXPRESSION for the COMBINATION of three resistors connected in parallel. between two common POINTS so that each of them provides a separate path for current, then they are said to be connected in parallel. As shown in the figure, consider three resistors R1, R2, R3 connected in parallel.

Answer:

According to The Law of Conservation of MOMENTUM" When two or more BODIES act upon one another, their total momentum REMAINS constant provided no external force acts on it". ACTIVITY : Let us make a balloon Rocket. Apparatus REQUIRED : Balloon, Thread, straw and double tape.

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Explanation:

all the diagram SHOWING the ray diagram of CONCAVE is SHOWN in the ATTACHMENT.

ANSWER:

Mass. Mass is a property of a physical object that quantifies the amount of matter it contains. Unlike weight, the mass of something stays the same REGARDLESS of LOCATION.

ANSWER:

Liquids take on the shape of their container. The liquid state of MATTER is an intermediate PHASE between solid and gas. Like the particles of a solid, particles in a liquid are SUBJECT to intermolecular attraction; HOWEVER, liquid particles have more space between them, so they are not fixed in position.

ANSWER:

The electrical resistance of a circuit component or device is defined as the ratio of the voltage applied to the electric current whichflows through it. That is R=V/I.

The electrical resistance of a wire would be expected to be greater for a longer wire, less for a wire of larger cross sectional area (that is square of the RADIUS), and would be expected to depend upon the material out of which the wire is made.

The resistance of a wire can be expressed as R=

A

ρL

where,

rho is the resistivity of the wire,

L is the LENGTH of the wire,

A is the area of cross section of the wire, that is, square of the radius.

In this case, two wires of the same material and same length have radii R1 and R2 respectively are taken. So, the resistance will differ only in the square of the radius.

Hence, the ratio of the resistance would be r

1

2

:r

2

2

and 1:1.

ANSWER:

Solar FURNACES have Concave mirror

Explanation:

In a solar FURNACE , light from the SUN FALLS parallel on the mirror . Thus , Concave mirror is used to converge the parallel rays of light at a point . This helps to increase the temperature of the furnace .

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EXPLANATION:

a BODY at REST MAY have ENERGY

Answer:

EXPLANATION:

can U  ask the QUESTION PROPERLY

Answer:

A projectile MOVES in a parabolic PATH without air resistance. ... Since the highest point is the point where the VERTICAL velocity is zero (it is the point where the vertical velocity component switches its sign), the projectile flies parallel to the GROUND at this INSTANCE of time.

Answer:

here length=14.5

3 significant figures. breadth=4.2

2 significant figure

therefore, Area=14.5×4.2cm^2

=60.90cm^2

the answers should be rounded off two significient figure

therefore,. the digit to be dropped in the answer 60.90 is 9( CIRCLED) which is greater than 5. so the PRECEDING ZERO is RAISED by 1 .

hence the answer is. = 61cm^2

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S.I unit of ACCELERATION is m/s^2.(metre PER SECOND SQUARE)

S.I unit of speed is m/s(metre per second)

Answer:

Bees motion is random motion.

They react to colors, odors and tastes hence their MOVEMENT DEPENDS more on the type or PLACE where they can find food thus making their motion an irregular one.

There are different types of motion which show a certain pattern of movement like a movement of ROTATION is ROTARY movement similarly linear and oscillatory are other types of motion but unlike these bees don’t have any pattern in their motion hence their motion is random motion.

ANSWER:

Don,t KNOW SRY BroNext TIME OK

ANSWER:

the si unit of POWER equivalent to the joul PER SECOND

ANSWER:

i THINK INCREASE..........................

Answer:

The medium for propagation of sound should be:

ELASTIC so that particles come back to the original position.

Should have INERTIA so that particles can STORE mechanical energy.

Medium should be FRICTIONLESS so that there is no loss of energy.

Answer:

6.25x10^18

Charge (Q) = 1 C  (Given)

Electron (e) = 1.6× 10^-19  (Given)

Number of electron (n) = We need to find

Now, 1C/s= 1 ampere.

Suppose n ELECTRONS MAKE 1C. Then,

=  ne /s= 1 ampere

Solving by unitary METHOD, where - Q = ne

Therefore, n=1(ampere)/(1.6x10^-19)C

= 0.625x10^19/s

= 6.25x10^18

Thus, 6.25x10^18 electrons per second should pass through a conductor in 1 second to CONSTITUTE 1 ampere of current.

Explanation:

the image of an object formed by a mirror is real inverted and 8 magicians is one if the image is at a distance of 40 CM from the mirror and the and where is the object placed where WOULD the image with if the object is moved 27 to word the mirror state the REASON and also DRAW ray diagram for the new position of the object or to just leave your the new position of the object to clean your answer is the very slowly and reason state distance of 40 and 80 CM PLEASE go and mirror in the real image and

Answer:

Two point charges 20 micro coulomb and 80 micro coulomb are 10 cm APART at point A and B. The distance between O and A is (10-x) cm and the distance between O and B is x cm. Hence, The electric field will be ZERO at 6.67 cm distance from 80 micro coulomb..

Explanation:

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Explanation:

Area = 0.01 mm² = 1×10^-2 mm² = 1×10^-5

= 1×10^-5 m²

FORCE = 20 N

We know that,

Pressure = Force / Area

==> 20 / 1 × 10^-5m

==> 20×10^5 Pascal

Thus, the Pressure acting on the GIVEN area is 20 × 10^5 Pa

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ANSWER:

Hope it helps u!!

Explanation:

Equilibrium is defined as a state of balance or a stable SITUATION where opposing forces cancel each other out and where no changes are occurring. An example of equilibrium is in economics when supply and DEMAND are equal. An example of equilibrium is when you are calm and STEADY.

Answer:

The mass of a MOVING tennis BALL is less than that of a CRICKET ball moving at the same velocity. Thus the tennis ball has less MOMENTUM than the cricket ball, because of which it is easier to stop a tennis ball than a cricket ball moving with the same velocity.

m=1000kgv=16m/s⟹628=r(2π)⟹r=400

∴Centripetal force=rmv2=400(1000)(16)(16)=640N

ORDER of MAGNITUDE = 11

Explanation:

given intial velocity (u) = 0 ( at REST )

final velocity (v ) = 10 m/s

acceleration (a) = 0.1 m/s^2

using THIRD eq. of motion i.e. v^2 -u^2 = 2×a×s

100 - 0 = 2 ×0.1 × s

s = 500 m

THEREFORE displacement is 500 m

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Answer:

Explanation:

We know that, Speed = Distance / Time

So, time taken to travel first 150 km, T1 = Distance / Speed = 150 / 30 = 5 h

Time taken to travel next 60 km, t2 = Distance / Speed = 60 / 40 = 1.5 h

Total distance TRAVELLED = 210 km

Total time taken = t1 + t2 = 5 + 1.5 = 6.5 h

So, average speed = Total distance / Total time = 210 / 6.5 = 32.308 km/

ANSWER:

HOURS , minutes, and seconds

Explanation:

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ANSWER:

◆ Answer -

(d) |AB| = 8.5 m

● Explaination -

Let i, j & k be unit vectors along X-axis, Y-axis & Z-axis.

A = i + 2j - 3K

B = 3i + 4J + 5k

Displacement of the man is calculated by -

AB = B - A

AB = (3i + 4j + 5k) - ( i + 2j - 3k)

AB = 2i + 2j + 8k

Magnitude of displacement is calculated by -

|AB| = √(2² + 2² + 8²)

|AB| = √(4 + 4 + 64)

|AB| = √(72)

|AB| = 2√18

|AB| = 8.48 m

From the options, 8.5 m is the most appropriate.

Explanation:

given power of electric heater = 1200 W= 1.2 KW

energy = power × time

= 1.2 × 20

= 24 kw / HR

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Answer:

ACCELERATION

EXPLANATION:

SLOPE of displacement TIME graph

H BICH me to do it for the FOLLOWING

ANSWER:

When deep SEA fishes are brought to the surface of the sea, their BODIES burst. This is because the BLOOD in their bodies flows at very.

Explanation:

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Answer: Hope this helps you

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Explanation:

The Coulomb's LAW of FORCE between two electrically charged particles :

        q₁ , q₂ = electric charges on the two particles.

          r = distance between two particles = 0.1 m

     the particles are assumed to be point sized.

        Force F = 18 N 

       q₁ + q₂ = 9 μ C    --- (1)

 Solve the two equations to GET the values of charges.

    q₁ (9 - q₁) = 20

    q₁² - 9 q₁ + 20 = 0

      (q₁ - 5) (q₁ - 4) = 0

      q₁ = 5 μ C  or  4 μ C

      q₂  = 4 μ C  or  5 μ C

GIVEN :

▪ Two IDENTICAL RESISTORS of resistances 3Ω and 6Ω are connected in PARALLEL.

▪ Applied voltage = 4V

To Find :

▪ Current FLOW through 3Ω resistor.

Concept :

→ We know that, Potential difference across all resistors remains same in parallel connection.

→ As per ohm's law, current flow through a conductor is directly proportional to the applied pd. (At constant temp.)

Mathematically,

✴ V = IR

where,

V denotes applied voltage

I denotes current

R denotes resistance

Calculation :

➡ V = I × R

➡ 4 = I × 3

➡ I = 4/3

➡ I = 1.33A

SINCE the acceleration of both the BLOCKS is same, i.e, G , for covering the same DISTANCE they will take the same time

EXPLANATION:

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Answer:

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Explanation:

CHROMATOGRAPHY (LITERALLY translated means "color writing") is one way in which mixtures can be separated. The isopropyl alcohol will move up the chalk by surface tension, similar to how water is absorbed into a NAPKIN. As the alcohol MOVES up the chalk, it picks up the ink pigment as it travels.

ANSWER:

Why do you not GET as MUCH torque when force is APPLIED closer to the axis of rotation? ... EVERYBODY says, the lower the torque, the higher the speed. But if the torque is high, then that means the engine is putting on more pressure, making the wheels rotate faster.

Explanation:

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The RESISTANCE of ammeter will be 1/499 G.

Explanation:

For ammeter:

0.0002 l x G = 0.9981 x rg

rg = 0.002 / 0.998 G

That is

rg = 0.002004

   = 1/499 G

Hence the resistance of ammeter will be 1/499 G.

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Answer:

They can be USED for wiping sweat , EMPTYING the CONTENTS of your blocked ... It's preferable to use tissues over handkerchiefs, which can be UNSANITARY and can MAKE you ...

Answer:

the electric CURRENT in one part of a circuit is MEASURED with an ammeter, which gives a reading in AMPERE.

ANSWER:

Explanation:

( ΔV/V)*100 = 2(ΔR/R)*100  +  ΔH/H

VOLUME = 2*2 + 3 = 7%

CURVED SURFACE AREA = 2(ΔR/R)*100 = 2*2 = 4%

Answer:

The total heat rewired is the SUM of the heat in rising the temperature of the water to 100 degrees from 25 degrees and LATENT heat as there is a phase CHANGE from liquid to valor at 100 degrees.

Q=mC(t2-t1) + mL

C=Specific heat of water

m= mass of water

L= Latent heat

t2-t1= temperature change

Q= 2.5 × 4.814 (100–25) + 2.5*334 = 1737.63

Resistance per UNIT length is “the ratio of SPECIFIC resistance or resistivity to the AREA of cross- section of a given conducting material”. ... Therefore, Resistance per unit length is the ratio of specific resistance or resistivity to the area of cross-section of given conductor in Ohm per METER.

ANSWER:

X= Y/4

Explanation:

just APPLY the principle of WHEATSTONE bridge.

Explanation:

In PHYSICS, binding energy is the minimum energy REQUIRED to either separate an electron from an atom or to separate the protons and neutrons of an atomic NUCLEUS. It is equal to the mass defect less the quantity of energy or mass RELEASED when a bound SYSTEM is created