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Given old AREA of crossection = a
old length= l
now wire stretched length become 2l and rho be resistivity of material
since
New volume = old volume
new area of crossection * new length = old area of crossection * old length
=> new area of crossection = a*l/2l
= a/2
old RESISTANCE (r) = rho l/a
new resistance = rho 2l/(a/2)
= 4 rho *l/a
= 4r
thus new resistance become 4 TIMES of old resistance

the answer is in the attachment hope it HELPS you it was quite a simple question because he owe you need to understand the basic concepts of series and parallel combination and MAKE USE of that knowledge for making the equation and then you can solve equation as USUAL

When the workdone PER unit is ONE then it is one VOLT.
Means,

when 1j of workdone in 1sec then 1 volt of p.d.wil be there.

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The wire is USED in fuse is LEAD and in bulb it is made up of tungsten.
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64km/hr=64000/3600=17.7m/sec
total DISTANCE =200+150=350meter
time =350/17.7=19.6sec=20sec APPROX

Hey,
50cm is the right answer !!!!
don't GET confused!!! what you tick in your options is the EXACT answer!!!!
I referred it !!!!
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I am solving 6th one:

The DISTANCE which is given to us during the first part = 10 km
The speed given to us during the first part = 30kmph

Now you can FIND out the time taken for it by dividing distance by speed.

T1= 10/30 = 1/3 hr
Similarily T2 can be found out by divinding 40 by 50
T2= 40/50= 4/5 hr

Now what is average speed it is the ratio of total DISTSNCE travelled to total time taken.

Putting the values=50/ 1/3+4/5
50/17/15
50*15/17 = 44.11kmph

I am attaching the SOLUTION also.

Given :-

When a horizontal force P acts on a cart of mass 20 kg,it moves with a uniform velocity on a horizontal FLOOR. When a force of 1.2P acts on the cart, it moves with an acceleration of 0.05 metre per second square. Find the value of P.

Solution :-

• SINCE in the first case the body moves with a uniform velocity , the resultant force on it in the horizontal DIRECTION must be zero .

H + force of friction = 0

or , force of friction = -H.

• In the second case , the net horizontal force is ( 1.5 H - H ) = 0.5H.

Applying Newton's second law ,

→ F = ma

→ 0.5 H = 50 kg × 0.1 m/s²

→ H = ( 50 kg × 0.1 m/s² ) / 0.5 = 10 N .

Thank You !

I didn't understand what you are SAYING?

literally the speed of ball will continuously decrease due to gravitational force which is continuously acting on the object. At a POINT of time the speed of ball BECOMES zero due to the gravitational force but later it falls back because now the gravitational force is SUPPORTING the motion of the ball & the speed of the continuously increase until it hit the ground

The dwarf planet Pluto has five moons down to a detection LIMIT of about 1 KM in diameter. In order of distance from Pluto, they are Charon, Styx, Nix, Kerberos, and HYDRA.[1]Charon, the largest of the five moons, is mutually tidally locked with Pluto, and is massive enough that Pluto–Charon is sometimes CONSIDERED a double dwarf planet.

It is FORCE and and AREA

ANSWER:

FERROELECTRIC ekmekanchya EDDINGTON echchuk

Explanation:

gunank afjal MANDU teeing LESH

Heya !!

PULL Or PUSH On an OBJECT is Called Force.

Pressure is Just Amount of Force PREPENDICULAR on object. ☺

One COMPLETE to and FRO MOVEMENT of the HAND of the PENDULUM.

We KNOW time=distance/speed
there FORE t=820/80=10.25hr :)

A STONE is THROWN into the AIR at an angle.And MOVING PARTICLES.

Hey mate here is ur answer

brake pads are used in automobiles to INCREASE fricition . MOREOVER the brakes stops the wheel but FRICTION stops the car.

if my answer satisfies u then u can MARK it as BRAINLIEST

I HOPE you KNOW how to calculate the PRESSURE by formulae i.e.

Pressure = Force/Area
P= 340/2.5 = 136 PASCALS

Hey MATE!!!
Here's your answer.

Yes. It is possible for the object to move with a constant speed along a straight line as the VALUE of the opposing force is not experienced by the object.

HOPE this will HELP you
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To LEARN about plotical.........

1 watt hour is energy CONSUMED when 1 watt of POWER is used for 1 hour the commercial unit of electric energy is KILOWATT hour COMMONLY KNOWN as unit
1kwh= 1000wattX3600sec

A neutral body has no charge
either no EXISTENCE of charge or cancellation of charge
it can be charged by friction CONDUCTION and INDUCTION

1joule=1x(1kg/gm)¹x(1m/1cm)²x(1s/1s)⁻²

=1x(1000g/gm)X(100cm/1cm)²x(1s/1s)⁻²

=10⁷ 
THEREFORE n1(joule)=n2(ERG)
∴1 Joule=10⁷erg
:.10 joules =10 power 8 erg

Hey here is your answer ☺️.


Potential of hydrogen or power of hydrogen is written as a formula of PH..



I HOPE IT WILL HELP YOU ☺️

Thnx for ASKING UR QUESTION ✌️✌️

Hii dear
here ur answer✌

▪☆☆☆☆☆•▪

▪
>>>Quantum PHYSICS is usually just INTIMIDATING from the get GO. It is kind of weird and can seem counter-intuitive, even for the physicists who deal with it every day

▪But it’s not incomprehensible. If you are reading something about quantum physics there are really six key concepts about it that you should KEEP in mind. Do that and you’ll find quantum physics a lot easier to understand....

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_______________________

By the process of INDUCTION ,... When we charge a metal SPHERE negatively by bringing a positively CHARGED rod near its left surface, the electrons get ATTRACTED towards the left side and positive charges on right side.

Above all not on CHARGE

The CENTRE of SPHERICAL mirror KNOW as pole , the centre of HOLLOW sphere of glass from which the mirror is formed known as centre of curvature , the PERPENDICULAR to spherical mirror know as principal axis from focus

For further INFORMATION ASK me

Our eyes are designed to detect a SMALL portion of the electromagnetic spectrum. This PART of the spectrum is CALLED the VISIBLE light region. The visible light region ranges in wavelengths from about 380 or 400 nm to 700 or 780 nm depending on which source is USED .

Lateral inversionmeans ..when in the REFLECTED image RIGHT APPEARS left and left appears right

It is the the RATIO of VELOCITIES and HENCE it has no UNIT...

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