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ANSWER:

REFER this.............

EXPLANATION:

.

Answer:

The electrons are particles which contain a unit NEGATIVE charge in them as protons contain unit POSITIVE charge in them. When they come enough CLOSE to each other attraction FORCE occur between them. ... therefore electron in atom rotate around nucleus.

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Answer:

I think He needs to know MATHS and Physics

Explanation:

Because Maths And physics he cannot do this.

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Answer:

16/1000=4/250=2/125 Kg

Explanation:

16 amu=16g

Then convert 16 g to Kg by dividing it by 1000.

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Answer:

If the LIGHT TRAVELS in a STRAIGHT LINE is callled a RECTILINEAR propagation of light.

Answer:

c is CORRECT

Explanation:

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Type of energy POSSESSED by the following:

[1] Stretched SLINKY- Potential energy

[2] A speeding car- Kinetic energy

[3] Flowing water- Kinetic energy

[4] Stretched rubber BAND- Potential energy.

Explanation:

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ANSWER:

Centimetre-gram-second(C.G.S) SYSTEM.

Density of the WOODEN block=0.8g/cm³

Volume =60cm³

Density=MASS/Volume

Thus----

Mass=Density×Volume

=>0.8×60

=>48g

Thus,mass of the block is 48g.

Liquids and gas are called fluids. The substances which have the ability to FLOW are called fluids. These fluids also exert force of friction on objects in MOTION through them. FLUID friction is friction that acts on objects that are MOVING through a fluid.

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Answer:

2:

Sliding friction is the force that ACTS against two surfaces that are rubbing together. Rolling friction is less than sliding friction as the rolling of ONE body over another REQUIRES a smaller area of SURFACE contact than sliding.

3:

she stops the car to save the child that means that she cares for the child and would have

felt guilty if the car had hurt the child.......

she didn't want the child to get any kind of hurt...

a:When we apply brakes, friction will be produced between tires and brakes . When we apply brakes, the friction between the surface of the road and the tyre of the vehicle is increased and hence the vehicle stops.

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a. CONVEX mirror.

b. concave mirror

C. convex mirror

d. convex mirror

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Answer:

Plane mirror just draw an INVERTED image and CONVEX form the image behind the mirror

Explanation:

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Explanation:

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ANSWER:

the molecular vibration increase

Explanation:

this is because when the temperature is raised they GAIN more ENERGY as a result the motion of the molecules increase. Hence, vibration INCREASES

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Answer:

Density bottles are mainly USED to determine the density of liquids of moderate viscosity. They are not volumetric instruments, however, they are calibrated 'to contain' as in the case of volumetric flasks. Determine the weight of the dry and empty density bottle. Fill the density bottle with LIQUID, AVOIDING bubbles.

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ANSWER:

WORK =FORCE ×displacement

displacement=work÷ force

=120 ÷40= 3M

ANSWER


And we shall FIND that (even in the potentially MUNDANE discussion of METERS, kilograms, and seconds) a profound SIMPLICITY of nature appears—all physical quantities can be expressed as COMBINATIONS of only four fundamental physical quantities: length, mass, time, and electric current

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Answer:

The tumbler which is in contact with the tray also starts moving along with the tray but the water PLACED in the tumbler remains in rest DUE to inertia of rest ,HENCE the water SPILLS out of the tumbler.

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ANSWER: 1.True 2.True 3.True 4.True 5.False

EXPLANATION:

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ANSWER:

REFRACTION OF LIGHT

Explanation:

Refraction is RESPONSIBLE for IMAGE formation by lenses and the eye.

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Answer:

A force of 100N acts on a body of mass 2kg for 10s. What is the change in MOMENTUM of a body?

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A force of 100 N acts on a body of mass 2 kg for 10 s. What is the change in momentum of the body?

According to Newton's Second Law of Motion, “ The rate of change of momentum of a body is directly proportional to the applied force and takes place in the direction of the force.

By choosing ONE unit of force to be a force which produces an ACCELERATION of one unit in a body of mass one unit, the constsnt of proportionality becomes 1, and the above law gives the equation,

F = ( m v - m u)/ t,

where, F = appled force, u = initial velocity, v= final velocity, t = time for which the force acts on the body of mass m, changing its momentum from m u to m v.

Accordingly,

m v - m u = change in momentum= F × t

In the present case force F = 100 N, and it acts on the body for 10 s, therefore

Change in momentum of the body= 100 N ×10 s= 1000 Ns.

Answer:

Step-by-step EXPLANATION:

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Hi,

Here is your answer

Given:

Displacement=2m

Force=50N

To FIND:

Work

Solution:

Work is given by the equation

Work=Force×Displacement

Work=50×2

Work=100J

Notes:

1. Work is a VECTOR quantity

2. The unit of work is Joule(J) or Nm

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Answer:

Yes , velocity is a vector quantity.

Explanation:

Vector quantities are quantities which have both magnitude and direction. And , the magnitude is showed by a NUMBER and UNIT . Velocity has unit m/s^-1 or m/s and acts in a PARTICULAR direction.

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ANSWER:

COMPLETE your QUESTION.... ..........

ANSWER:

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ANSWER:

• A device used to MEASURE DISTANCE is Odometer.

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Yes, zero displacement is POSSIBLE if an object has moved through a distance.

Suppose a ball STARTS moving from POINT A and it returns back at same point A, then the distance will be EQUAL to 20 meters while displacement will be zero.

ANSWER:

SENIOR SECONDARY RECRUITS (SSR)

Answer:

distance-300. Mts.

displacement-0

Explanation:

distance= total covered path

so when the athlete RUN around a track 3 times then it means that total distance will be 3*distance in ONE round

=3*100

=300 mts.

Now, displacement is the shortest path

We know that when a body starts from a point which is its initial point and then returns BACK to it i.e. to its final point then it's displacement is said to be 0

therefore, displacement done is this case is also 0 as the athlete comes back to his initial POSITION after 3 ROUNDS..

5. Because of the more the surface area the less,s the pressure and the less the surface area the more the pressure. We will NEED more pressure to cut and PIERCE OBJECTS that is why the tools meant for cutting and PIERCING have SHARP edges.

25,/@@"'652--':('"!'"(,6425*'$$"=653-$(#"=652*$(",656'""953'""

Answer:

579.3 approximately

Explanation:

s=960km/hr

=960÷5/18

=3456m/s

time=1hr50min=6600 seconds

distance=speed× time

distance= 3456×6600

distance=22809600 metres

distance=579.364 kilometers

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Answer:

Given, MASS M = 252 g

Volume V = 30 cm3

(i) Density d = M/V = 252/30 cm3

= 8.4 g cm-3

(ii) SINCE, M = 252 g = 0.252 kg

V = 30 cm3 = 30 × 10 -6  m3

Density d = 0.252 kg/(30 × 10 -6 m3 ) = 0.252 kg/30 × (1/1000000) m3

= (0.252 × 1000000 kg)/30 m3 = (25200/3) kg m-3

= 8400 kg m-3

ANSWER:

Explanation:

When the SURFACE AREA is more the resistance of air is also more.

The mass of YHE crushed ball of paper US the same as the one which is not.

Since the area if the paper not crushed is more, so the resistance of air will be more over it than the crushed ball.

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Answer:

140 km/h

Explanation:

We Know that Va/VB = Va - Vb ( Va= VELOCITY of A and Vb= Velocity of B)

So here Va = 70km/h

And Vb= -70km/h (as it is GOING in opposite direction)

So Putting VALUES in formula..

Va/Vb = 70 - (-70)

= 140 km/h

Answer:

11 G of CARBON DIOXIDE will be FORMED

Answer:

The density of brass is 8.4 g/cm^3. What do you mean by this statement?

ANS]The density of Brass is 8.4 g/cm^3. This statement means that every 1 cm^3 of Brass has a mass of 8.4 g. It is because density equals mass per UNIT volume.

Also explain how the volume will change with respecr to temperature incase of water.​

Ans] We know that intermolecular force in molecules of LIQUID and gas is weak. Because of this reason when we increase the temperature the molecules start moving vigorously. This vigorous movement causes presence of less no. of molecules in per unit volume because of which Density decreases on INCREASING temperature in case of liquids and gases. But on COOLING them the molecules the molecules come closer and more molecules are present in per unit volume thereby increasing density. Thus, we can say that Density is inversely proportional to Temperature.

Answer:

1.22  gcm−3

0.814  gcm−3

1.39  gcm−3

0.765  gcm−3

✬ Acceleration = 0.5 m/s² ✬

✬ Distance = 175 m ✬

Explanation:

Given:

• Uniform VELOCITY of BUS is 54 km/h.
• FINAL velocity of bus is 72 km/h.
• Time taken to REACH final velocity 10 seconds.

To Find:

• Acceleration of bus is m/s ?
• Distance covered by bus ?

Formula to be used:

• v = u + at ( For acceleration )
• s = ut + 1/2at² ( For distance )

Solution: First changing the uniform and final velocity into meter/second. To change multiply by 5/18.

➟ Uniform velocity (u) = 54(5/18)

➟ u = 15 m/s

➟ Final velocity (v) = 72(5/18)

➟ v = 20 m/s.

Now,PUT the values on formula

v = u + at

20 = 15 + a(10)

20 – 15 = 10a

5 = 10a

5/10 = a

0.5 m/s² = a

Hence, Acceleration of the bus is 0.5 m/s².

Now, for Distance use the second formula

s = ut + 1/2at²

s = 15 10 + 1/2 0.5 10²

s = 150 + 0.5/2 100

s = 150 + 0.5(50)

s = 150 + 25

s = 175 m

Hence, the distance covered by bus is 175 m.

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ANSWER:

No.............................

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