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Force on the table is given by

F =mg=40 x 980=39200 dynes

Zero dyne because in ques. they mentioned that it moving with const.velocity therefore acc. is zero so force = 0 dyne

80 dyne ( F=ma, so 40* 2= 80 dyne )

f= m * a =mv/t for one second is t

so f= 40*2 gm cm per second f= 40*10 gm cm person

ie 80

1/R=1/20+1/20R=10I=3/RI=3/10I=0.3amp

A proton,deutron,and alpha particle are infinity uniform magnetic field with same speed and perpendicular to magnetic field.which particle circulate in the field with more frequency and more radius??

how u got coefficient of dynamic viscosity formula

means value of that

tx

v'=4vhencev'=2*4=8m/s

(c) is a correct answer

(c) is a correct answer

The Maxwell right hand thumb rule indicates the direction of the magnetic field in a direction of current. If the thumb of the right hand points along the direction of current, then the remaining curled fingers of the same hand gives the direction of the magnetic field due to the current. When the position of the thumb will be upward, the curled fingers will be anti-clockwise and the magnetic field will be anti-clockwise too and vise versa.

Newton's ringsis a phenomenon in which an interference pattern is created by the reflection of light between two surfaces—a spherical surface and an adjacent touching flat surface. It is named for IsaacNewton, who first studied the effect in 1717.

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sir please solution dijiyega

(2) is the correct answer of this question

Option 2 is correct because acceleration is proportional to g / difference between the two masses.

Renewable resources are the resources which can be revived, through the natural process, over time. On the other hand, non-renewable resources are the natural resources which are not going to be replenished, shortly. Renewable resources do not become extinct easily, and so they are sustainable in nature.

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The formula for velocity is distance ÷ time taken. In symbols:

V=S÷t.

Where:

V = velocity

S = distance

t = time taken.

To solve your question:

You need to convert each unit to its standard form, so:

V = 45Km/hr = 12.5m/s

S = 1km = 1000m

t = ?

Solution

V = S÷t

12.5 = 1000÷t

Making t subject of formula:

t = 1000÷ 12.5

t = 80 seconds.

So it will take 80 seconds for a train moving at 12.5 meters every second to cross a kilometer long bridge.

However,

The question states the train is 100 meters long.

This means the last point on the train has an extra 100 meters to cover.

So it becomes:

t = 1100 ÷12.5

t = 88 seconds.

So the time it takes a train 100m long, moving at 12.5km/hr to cover 1km is 88 seconds or 1 minute, 28 seconds

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.

Yes, zero displacement. Can be the answer because when car moves from point A and comes to again point A the distance is equal to 30 meters and displacement 0

yes if the starting position and final po

yes if the initial position and final position of the object is same

a =acceleration u =initial velocity v =final velocity s =displacement t =time according to question u =0 m/sec t=5 sec s =87.5 m we will apply equation 2 s =ut +1/2 at ^2 87.5 =0×5 +1/2 a (5^2 )87.5 =1/2 a (25 )87.5 =a 12.587.5 /12.5 =a 7 =a so ,7 m /sec^2 is acceleration

Since the image touches the rod, one end of the rod must be at C of the mirror.Since the image is real and elongated, the other end of the rod must be between C and F of the mirror.The distance of this latter ( A) end from the optic center of the mirror is (R-f/3) = 2f-f/3= 5f/ 3(u –f)= 5f/ 3-f = 2f/3m = f/ (u-f) = 3/2 = 1.5

Magnification of the A end of the rod is 1.5 where as the magnification of the joint of image and rod is 1.

18 km/hr =18*5/18 m/s =5m/sso, 36km/hr =10m/sacceleration=change in velocity /time=1m/s^2s=ut+0.5at2=25+25/2=37.5m

1

The total volume remains the same before and after stretching.

Therefore A xl = A’ x l’

Here l’ = 2 l

A’ = A x l / l’ = A x l / 2 l = A/2

Percentage change in resistance

= Rf– Ri/ Rlx 100 = ? l’/A’ - l/A / l ? l/A x 100

= [ (l’/A’ X A/l) – 1 ] x 100 [(2 l/A/2 x A / l)-1 ] x 100

= 300%

Since the falling object is a ring the projection of length of the ring along right angle is equal toPR= 2R

emf=Blvemf=Blv=B2RV

and induced current in anti clock wise direction.

So,R will be with higher potential 2RBv

Hence d is the correct answer

F = 5N

a = 8m/s²m = F/a = 5/8 kg

a2 = 24 m/s²m2 = 5/24 kg

m+m2 = 5/8 + 5/24 = (15+5)/24 = 20/24 = 5/6 kgacceleration of mass tied together = F/(m+m2) = 5/(5/6) = (5×6)/5 =6 m/s²

Suppose an object of mass, m is moving along a straight line with an initial velocity, u.It is uniformly accelerated to velocity, v in time, t by the application of a constant force, Fthroughout the time, t. The initial and final momentum of the object will be,p1 = mu and p2 = mv respectively. The change in momentum ∝ p2 – p1The change in momentum∝ mv – muThe change in momentum∝ m × (v – u).The rate of change of momentum ∝ m × (v −u)/tOr, the applied force,F ∝m × (v −u)/tF = km (v - u)/t

F = kma Here a [a = (v – u)/t ] is the acceleration, which is the rate of change of velocity. The quantity, k is a constant of proportionality.The SI units of mass and acceleration are kg and m s-2 respectively. The unit of force is so chosen that the value of the constant, k becomes one. For this, one unit of force isdefined as the amount that produces an acceleration of 1 m s-2 in an object of 1 kg mass.That is, 1 unit of force = k × (1 kg) × (1 m s-2).Thus, the value of k becomes 1. and F = ma which is the mathematical expression on the Newton's second law of motion.

A metalloid is a chemical element that exhibits some properties of metals and some of nonmetals. ... Definition for metalloids: elements with properties intermediate between metals and nonmetals. Boron, silicon, germanium, arsenic, antimony, tellurium, and polonium are metalloids

Difference between metals and non-metals

The metals are generally present in the solid form at room temperature except mercury which is liquid at room temperature. Whereas non-metals may be solid, liquid and gaseous at room temperature.

Metals are good conductors of heat and electricity but non-metals are poor conductors of heat and electricity.

Metals are ductile in nature i.e. it can be drawn into thin wires. But non-metals are not ductile.

Metals are malleable but non-metals are not malleable. Malleable means the property through which metals can be hammered into thin sheets.

Metals are lustrous i.e. having shinning appearance but non-metals are dull in appearance.

Metals contain 1 to 3 electrons in their outermost shell whereas non-metals contain 4 to 8 electrons in their outermost shell.

Metal loses electrons to form electropositive ions but non-metals accept electrons to form electronegative ions.

Metals have low ionization enthalpy and non-metals have high ionization enthalpy.

Metals react with oxygen to form basic oxides whereas non-metals usually react with oxygen to form acidic oxides.

Metals are good reducing agent as it loses electrons easily from its valance shell. But non-metals are good oxidizing agent as it accepts electrons in its outermost shell.

Metals are sonorous in nature i.e. produces sound when hit by an object. but non-metals does not produces any sound.

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Least count = 200-100/10= 100/10= 10 for ameeterand for Voltmeterits2-1/10= 0.1nowb) resistance= v/i= 2.4/250*10^-3= 9.6 ohm

Least count = 200-100/10= 100/10 = 10 for ameterand 2-1/10= 0.1 for voltmeter

Noble metals like gold or platinum will not react with sodium hydroxide. Their oxidization potentials are simply to high to sustain the reaction.

V1=80V BECAUSE V=RI V= 240÷30= 80 JUST AS V2AND V3ALSO WE CAN FIND

Is= 100<0so230/115*25= 50<30

the given circuit is a wheat stone bridge as 10/20 = 20/40

so remove the middle resistance of 60Ω ( because they are in between equipotential points

so, 10 and 20 are in series , adding up to 30Ω

and 20 and 40 are in series , adding up to 60Ω

now this 30Ω and 60Ω are in parallel...

the equivalent resistance is = 30*60/(30+60) = 20Ω

option C

20free

The options could have missed the right answer.

Flywheel is aHeavy wheel attachedto a rotatingshaftto smooth out delivery of power from amotorto a machine. The inertia of the flywheel opposes and moderates fluctuations in the speed of theengineand stores the excess energy for intermittent use.

Heavy wheel attachedto a rotatingshaftto smooth out delivery of power from a motor to a machine. The inertia of the flywheel opposes and moderates fluctuations in the speed of theengineand stores the excess energy for intermittent use.

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