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Answer:

80M

Explanation:

Velocity of the BALL = u=50m/s  (Given)

Time = t = 0 (Given)

Distance travelled from t = 0 to t = 8 - ?

a = -10

According to the SECOND equation of motion -

s = ut+1/2at²

Thus, SUBSTITUTING the value -

s = 50 × 0 + 1/2 × (-10) × 0

s = 0

Now, again,u=50m/s , a = -10, and  t=8sec

 s = ut+1/2at²

Thus, substituting the value -

s = 50 × 8 + 1/2 × -10 × 8²

s = 400-320

s = 80

Thus, the distance travelled from t = 0 to t = 8s is 80m.

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Answer:

In geometry, a POSITION VECTOR is also known as location vector or radius vector, is a Euclidean vector that represents the position of a point P in space in relation to an arbitrary reference origin O. Usually denoted x, r, or s, it corresponds to the straight LINE segment from O to P. In other words, it is the displacement or translation that MAPS the origin to P

Answer

FORMULA of ACCELERATION is v-u/t

40-10×5/18=30×5/18=15×5/9=75/9

Scalar QUANTITIES are those which have MAGNITUDE only..For EXAMPLE:Distance,CURRENT..

Vector quantities are those which have magnitude and direction both..For example:displacement,force..

ANSWER:

It is CALLED BOND FORMATION

a wave in which the MEDIUM vibrates at RIGHT ANGLES to the DIRECTION of its propagation.

Example : VIBRATIONS in strings

if you don't change the direction of motion of BODY then both magnitude of velocity and SPEED will be same for EXAMPLE to TAKE motion in a single PLANE

EXPLANATION:

the DIFFERENCE is that water is an incompressible FLUID -its density is almost CONSTANT as the PRESSURE changes while air is a compressible fluid its density changes with pressure

Answer:

16km

Explanation:

3 + 4 + 9 because there is no OVERLAP that's why it 3+4+9

2when a BALLL is THROWN UO its VELOCITY is ZERO

Answer:

1minute because train is also 100M LONG and speed IA 60km/h so1km 1 minute

Answer:

A is at a higher potential. The potential difference is -0.05 V. The COMPONENT of the electric field is 1.25 Vm⁻¹

Explanation:

Work done=10J

Charge(q)(W)=-200 C

Now, let potential at A be Vₐ and that at B be Vᵇ.

Now, Uₐ=(-200)Vₐ, Uᵇ=(-200)Vᵇ.

Work done=Difference in potential ENERGIES

(-200)Vᵇ-(-200)Vₐ=10

⇒ -200Vᵇ+200Vₐ=10

⇒ Vₐ-Vᵇ=10/200

⇒ Vₐ-Vᵇ=0.05

Since, Vₐ-Vᵇ>0

Hence, Vₐ>Vᵇ.

P.D.=Vᵇ-Vₐ= -0.05 V

Component of ELECTRICAL field E= -dV/dR

= -(-0.05)/0.04

= 1.25 Vm⁻¹

Liquid:-

• It takes the shape of the container in which it is put.
• It is a fluid.
• It is COMPRESSIBLE to some extent.
• It has spaces between its particles.
• Its particles move constantly.
• It is not very rigid.
• It has a definite volume.
• It CHANGES to GAS when HEATED.

Answer:

for example if you complete a MOTION in a circular PATH then you displacement will be ZERO at the position where is START but your DISTANCE will be the circumference of that circle.

ANSWER:

FREQUENCY = 1/time PERIOD

Answer:

When you travel in a STRAIGHT line from A to B then MAGNITUDE of displacement is EQUAL to DISTANCE

HEYA MATE !

COVALENT bond --> When TWO or more elements share it's ELECTRONS to stable themselves is called a covalent bond.

IONIC bond--> When elements either lose or gain electrons to stable each other is said to be an ionic bond.

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Life☯️Love❤️Peace☮️

a). It acts as insulator to avoid the CURRENT to FLOW when touched.

b) It ALSO used as insulator to make ourself not to touch hot part.

d)they are used because they are light, decorative MATERIALS easily FORMED.

a) FACTORS on which the MAGNETIC field PRODUCED by a CURRENT carrying conductor depends on are:

The strength of the current.

ANSWER:

what is a Neutron STAR:

when a giant star has it's ore collapsed the neutron star is formed. As they are the collapsed logically these stars are very small in SIZE. the neutron stars are very very hot in their temperature and hence are white in color.

Scientifically how are Neutron stars formed:

When the cores of the star COLLAPSE, the protons and electrons melt into each other. this helps in the formation of NEUTRONS. hence, the star is named as neutron star.

ANSWER:

the answer is NUL VECTOR

Answer:

Plastics have NUMEROUS properties that make them superior to other materials in many applications.

Plastics generally have resistance to corrosion and chemicals, low electrical and thermal conductivity, HIGH strength-to-weight ratio, colors available in a wide variety and transparent, resistance to shock, GOOD durability, low cost, are easy to MANUFACTURE, RESISTANT to water and have low toxicity.

Answer:

C. generation of a current in a COIL due to RELATIVE MOTION between the coil and the magnet

Explanation:

this law is given by Faraday's

I THINK this is helpful to you

DECOMPOSITION REACTION while DIGESTING FOOD MATERIALS

EXPLANATION:

nsbsb

d

d

d

s

s

s

s

s

s

s

s

s

s

s

s

s

s

s

s

s

s

Explanation:

2 and pie are DIMENSIONLESS. therefore √l/G should match the dimensions of 'T'. 'g' has dimension 'LT^-2' therefore √l/g will have dimensions √L/LT^-2 = √T^2 which is EQUAL to T. as dimension of LHS is equal to dimension of RHS, HENCE proved.

Explanation:

SPEED is simply defined as the rate at which an OBJECT covers a given DISTANCE in a particular period of time. Mathematically, it is represented as speed (s) = distance (d)/time (t)

say, for EXAMPLE, if an object travelled 100 meters in 10 seconds then its speed would be

s = 100/10 = 10 m/s

unit of speed is ms -1

Answer:

1.Making an observation,

2.Asking a scientific question,

3.Formulating a valid HYPOTHESIS,

4.Testing that hypothesis,

5.Analyzing the data,

6.Drawing conclusions,

7.Then COMMUNICATING the RESULTS to the scientific community.

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Answer:

Trains have HUGE masses and rails are narrow. Therefore if they are directly put on earth, they will sink down due to the EXTREME pressure it would exert on earth when run over by the train. So they are laid on wooden or iron SLEEPERS of large area so that pressure on earth is reduced.

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Answer:

it has very high RESISTANCE

Explanation:

a VOLTMETER is connected in parallel because it has very high resistance. if it is connected in series CIRCUIT it will not allow any current and VOLTAGE to pass

ANSWER: UNIFORM MOTION

ANSWER: 10 m/s and 0m/s

Answer:

The mean wind speed (10si) is not EQUAL to the speed of the mean wind COMPONENTS.

The mean wind speed for the MONTH is produced by CALCULATING the wind speed at each individual TIME within the month and then averaging over the month.

Example

Consider a wind of 10ms-1 that is westward for half of the month and eastward for the other half. The mean wind speed is 10ms-1, but the mean of the U wind (and V wind) component is zero. The speed of the mean components is also zero.

Answer:

DAIRY & oil REFINING industrial this PROCESS centrifugal separator is used

Explanation:

The force FIELD of the electric Current is the ELECTROMAGNETIC field. In fact the prime force field if the universe is the electromagnetic force and the electricity and magnetism are it's manifestation

So LIKE there is no separate 'some' and 'one'in someone there is no separate existence if electric and magnetism in electromagnetic fields.

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ANSWER:

DIMENSION is CL to the POWER -2

Answer:

Your answer is below

Explanation:

(a) 30KG

(B)Always 30kg

Because the MASS on moon will BECOME 1/7 of the mass as compared to over EARTH of object.

ANSWER:

NEWTON gravitational constant has DIMENSION of the length

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THANK YOU

When we see the SUN at sunrise or sunset, when it is low in the SKY, it may appear yellow, orange, or red. But that is only because its short-wavelength colors (green, blue, VIOLET) are scattered out by the Earth's atmosphere, much like small waves are DISPERSED by big rocks along the shore.

EXPLANATION:

plasma: fluid part of the blood

RBC: red blood cells contains a red pigment called haemoglobin which helps in carrying oxygen and makes the blood appear red.

WBC: WHITE blood cells FIGHTS against the germs that may ENTER our body.

platelets: helps in blood clotting.

1. Average speed = Total distance / Total time TAKEN

= S1 + S2/t1 + t2

S1 = 10km

= 10*1000 = 10000m

S2 = 10km

= 10000m

t1 = 20min

=20*60 = 1200sec

t2 = 30 min

= 30*60 = 1800sec

Average speed = 10000 + 10000/1200 + 1800

=20000/3000

= 6.67m/s

2.

we can use the formula 2xy/x + y

so,

2 x 20 x 30/ 20 + 30

12000 / 50

= 240 km/hr

MOTION can be VISUALISED with the HELP of vector

please MAKE my answer as BRAIN list...

Answer: in accelerated motion, as we know that the DIRECTION of the body is changing at every POINT and if direction changes the velocity also changes. so to keep a CONSTANT velocity, the BOY has to ACCELERATE constantly which he is doing.

Answer:

A perfectly ELASTIC COLLISION is DEFINED as one in which there is no LOSS of kinetic energy in the collision. ...

ANSWER:

Buses and Trucks have double WHEELS on the rear SIDE as the both MEANS of transport carry heavy WEIGHT and to balance the extreme weight they have double wheels on the rear side.

ANSWER:

CORRECT answer of this QUESTION is 88 METRE.

Answer:

Explanation:

Taking d to be the WIDTH of the RIVER and also the the shortest distance COVERED by the swimmer.

If the swimmer makes an angle θ with the upstream, then angle (90-θ) will be normal to the stream.

Thus, shortest time TAKEN will be the own distance i.e t=d/v.

If speed of the river is v.

Thus, making an angle (90-θ) will be cos(90-θ)  and so speed will be VCOS(90-θ).

The shortest distance to cover the river in time will be

t1 = d/vcos(90-θ)

t1= d/vsin(θ).

The ratio will be  t/t1

              =(d/v)/(d/vsin(θ))

              = sinθ.