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We have,
u (INITIAL velocity)=0
a (acceleration)=5m/s²
t (TIME)=2sec

As you KNOW a=(v-u)/t
we have been given a,
so 5=(v-0)/2

10=v-0
v=10m/s

So final velocity (v) = 10m/s

Hope it helps.
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The TIME PERIOD= 20/10s=2s

Here is ur answer ji
ELECTRIC FIELD intensity is the strength of an electric field at any PT.
It is EQUAL to the electric force per unit charge PLACED at that pt. The unit measurement is volts per meter or Newtons per coulomb.
Hope it helps you out ji
Thanku ji

We have,
U = 18km/h (5m/s)
t=2sec
v=0

So,
RETARDATION = (v-u)/t

(0-5)/2
-5/2
retardation = -2.5m/s²

Thanks!

It means that the ELECTRICAL POWER and the POTENTIAL DIFFERENCE of the ELECTRIC iron are 750 W and 220 V respectively.

Which of the FOLLOWING? WRITE CLEARLY what you WANT to write

Hello FRIEND your ANSWER!!
I think OPTION D All of these
is correct.

Here is UR ANSWER JI
Option C
Evaporation and melting
Hope it HELPS you out ji
Thanku ji

A metre scale can measure up to accuracy of 1 mm which is EQUAL to 0.1 cm .
you can INCREASE its accuracy by increasing the number of divisions in it .



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For EXAMINE experiment
for MAKING torch
for making SOLAR panels
for ELECTRICAL USERS

The condensation point will be 17.8 degree C QND other will be 290 C

We KNOW that FORCE =MASS*gravity
75=2.5*gravity
30 is the GRAVITATIONAL FIELD

>> 2Hours
A•----------------------------------•B
<< 3Hours

So,
You KNOW that average speed is :

Total Distance
____________

Total TIME Taken

So,

200+200/3+2

400/5
= 80km/h


Thanks!

WILD ANIMALS; Elephant,tiger,lion,deer,giraffe,ZEBRA,kangaroo,BEAR,panda,rhinocerous.

If it COVERS 11km in 500 revolution
then it covers 11km/500 in ONE revolution

11km/500

= 0.022 km

= 0.022 × 1000

= 22 m

so perimeter of the bicycle wheel is 22m

perimeter of the circle = 2πr

22 = 2×22/7×r

22 = 44/7 × r

22×7/44 = r

7/2 = r

3.5 m = r

so the redius of the circle is = r = 3.5 metre

area of bicycle wheel

= πr²

= 22/7×(3.5)²

= 22/7×12.25

= 22×1.75

= 38.5 m²

so àrea of bicycle wheel is 38.5 square metre

Electric charge Electric charge ...× 10−19 COULOMB. In the centimetre–gram–second system there are two units of electric charge: the electrostatic unit of charge, esu, or statcoulomb; and the ELECTROMAGNETIC unit of charge, EMU, or abcoulomb. ONE coulomb of electric charge equals about 3,000,000,000 esu, or one-tenth emu.

Here we can apply work-energy THEOREM. There are 30 steps .Each STEP has 20cm height. So total height is 6m.So work by boy =mgh=40*6*10=2400J. Similarly work by girl =1800J. Power of boy=2400/4=600J/min. Similarly work by boy=1800/3=600J/min .So both have same power .If I am WRONG ,I am sorry. (Here I used g=10m/s)

Hello friend..!!!

in the above question , we should calculate the height attained by the ball ,

we know H = ut - 1/2gt²

u = ?? 

t = 6 sec 

h = ??

we know that ,

v = u + at  ( but here v = -u before reaching the ground )

-u = u + at 

-2u = at  ( a = g = 9.8 and t = 6 )

u = ( 9.8 x 6 ) / 2 

u = 29 . 4 m / s -----------------------( 1 ) 

we know,

H = ut - 1/2 gt²

H = (29.4)(3) - 1/2(9.8)(3X 3 )

here i considered t = 3 sec because , the question asked is for max height so if the TOTAL time taken for the journey is 6 sec then half of it is 3 sec.

H = 44.11 m

_______________________________________________

hope it helps...!!

Hey friend!
The answer:-

No ,
If the air is removed from the vessel the person STANDING even closely cannot hear the sound .

●REASON ●
Because sound cannot travel through VACUUM it NEEDS a medium to travel. since all the air is removed from the vessel it becomes vacuum inside and hence the person cannot hear the sound of the alarm bell.


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HERE IS THE ANSWER;

◆ The level of water will increase as per the volume of the stone.

◆ You can assume this by taking a glass FULL of water & mark the water level.

◆After this, DROP some small stones on it & OBSERVE the water level. You will notice that the water level will increase as per the volume of stones immersed.


HOPE IT HELPS

Moment of a force about an axis. The moment of a force about an axis p is defined as the PROJECTION OB on p of the moment (see Fig. 3.5). Figure 3.5: Momentof the force F about the axis p. DENOTING the UNIT vector of p, the moment MP of force about an axis p can be expressed as scalar product (dot product)

There is a BIG DIFFERENCE

Use the GRADUATED cylinder to indirectlydetermine the volume of a drop ofwater. MAKE sure the PIPET is in a vertical position. (KEEP in mind that 10 mL graduated cylinders do not give reliable measurements unless thevolume is greater than 1 mL.)

Inertia was best explained by Sir Isaac Newton in his first LAW of MOTION. Basically, the law states that an object at REST stays at rest and an object continues its state of motion until an external force acts on it. He has given some PROPERTIES related to motion
I HOPE IT IS HELPFUL FOR you
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14.70 POUND PER SQUARE INCH

Here first you have to define what is the contact area in between the two objects.

Case 1.
if the contact area is same in both of the cylinders then the PRESSURE will not CHANGE and it will remain same in case of both of the cylinders.

Case 2.
Is the surface area of the object is more than the surface area of the smaller cylinder then when the object will be placed on LARGER cylinder the contact area will increase.

assuming that the contact area is same as that of surface area of the cylinder.

Pressure = (F/A)
A1 = πr² = 16π
A2 = πr² = 64π
A3 = πr² = 4π
(P1/P2) = (1/4)
(P1/P3) = (4/1)

so the new pressure will become 4 times of the initial pressure in case of 8 CM RADIUS cylinder.

and it will become one fourth in case of 2 cm radius cylinder.

★ Ello ★

OHM' s law :-

Ohm's law is given by George Simon Ohm.
according to this law:-

the relation between electric current and potential difference is known as Ohm's law.

Ohm's law is valid only if temperature of conductor is constant or remains the same.

according to this law ;-

the electric current flowing in a conductor is directly proportional to the potential difference across the END of conductor.

here is a proof of Ohm's Law

1 ) electric current is directly proportional to potential difference

I directly proportional to V

and ,

V is directly proportional to I ( current )

V =I R

here R ( resistance ) is the proportionality. and.

V / I = R




Ohm's law can be started as the ratio of potential difference across the end of conductor overflowing current through its remain constant If temperature and other physical condition of conductor remains constant.






1 Ω is defined as:-
if the potential difference of 1 volt across the end of conductor makes a current of 1 AMPERE PASSES through conductor.





hope it helps you dear !!

thanks !!

Heya

1. If you are icse board student do not use coloured pens inside project.
2. Use HD+ pics and WRITE about pic downside.
3. Describe about how newtion get these ideas .
4. Use EXAMPLE to demostrate it.
5. Do not forget to give mathematical EXPRESSION and derivation of formulae.


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In a flute the sound is produced by the vibration of AIR present in the flute.
You can SAY air column PRODUCES sound in a flute.