Explore topic-wise InterviewSolutions in .

As, we know

Force= mass*acceleration

Where acceleration = velocity/time and dimensionally,

acc. =[LT-1]/[T]= [LT-2]

NOW,FORCE IS DIMENSIONALLY represented as

F= m*a= [M] * [LT-2]= [M¹L¹T-2]

In series connection current remains same and voltage divided according to the resistance of the appliance. When we put electric bulb and electric heater in series then it will divide the voltage which ultimately divided the power double.

Speed of the police van, Vp = 36 km/h = 10 m/sMuzzle speed of the bullet, Vb = 140 m/sSpeed of the thief's car, Vt = 108 km/h = 30 m/sSince the bullet is fired from a moving van, its resultant speed can be obtained as: = 140+10 = 150 m/sSince both the vehicles are moving in the same direction, the velocity with which the bullet hits the thiefs car can be obtained as:Vbt = Vb - Vt= 150 - 30 = 120 m/s

Displacement (s) = 4.05 m

g = -10 m/s² Final velocity (v) = 0 m/s

To find: Initial velocity (u) = ? ttotal (t) = ?

Formulae: v² = u² + 2gs, u + gt

ttotal = 2 × t

Solution: v² = u² + 2gs

0² = u² + 2 × (-10) × 4.05

0 = u² - 81

u² = 81

u = 9 m/s

v = u + gt

0 = 9 + (-10) × t

10 t = 9

t = 0.9 s

Time of ascent = Time of descent ttotal = 2t

= 2 × 0.9 = 1.8 s

The initial velocity was 9 m/s and total time taken to come down, is 1.8 s.

Weight of 12 balls = 58.5 × 12 = 702

one ball= 58.5g12 ball= 12×58.5=702g

f=maa=20/0.2a=100m/s²f=0.06*100=6N

tq

mass is 60gvelocity is 20 m/shung in air 0.2sso now accelerate a=20/0.2=100F=m*a=100*60=6N

They have patterns and designs so that there could be a proper contact between the road .if it is a flat or smooth.it will not run efficientlythese spikes or pattern gives a perfect friction between two surfaces

There are 2 types. Analog and Digital Signals.

no effect and in second A2 will not show reading

The fundamental units are the units of the fundamental quantities, as defined by the International System of Units. They are not dependent upon any other units, and all other units are derived from them. In the International System of Units, the fundamental units are:

The meter (symbol: m), used to measure length.

The kilogram (symbol: kg), used to measure mass.

The second (symbol: s), used to measure time.

The ampere (symbol: A), used to measure electric current.

The kelvin (symbol: K), used to measure temperature.

The mole (symbol: mol), used to measure amount of substance.

The candela (symbol: cd), used to measure light intensity.

The current in the forward bias is primarily due to major carriers but in reverse bias it is due to the minor carriers. As the fractional change in the reverse current due to the photoeffects is more easily measurable than in the forward bias current. So photodiodes are operated in the reverse bias

voltage divider bias is also called potential divider bias

I want how it works.and use of it?

please

Apotential divider bias, also known as voltage divider bias, is a method used for the dc biasing ofbipolar junction transistors(BJT) in a simple amplifier circuit. The circuit usually consists of biasing resistors in a voltage divider network whose values are determined through circuit analysis. Utilised in the field of electronic engineering, it forms an important part of small signal analysis for emitter-stabilised circuits.

Three laws devised by Johannes Kepler todefinethe mechanics ofplanetary motion. The first law states thatplanetsmove in an elliptical orbit, with the Sun being one focus of the ellipse. This law identifies that the distance between the Sun and Earthisconstantly changing as the Earth goes around its orbit.

Kepler's three laws ofplanetary motioncan be stated as follows: (1) Allplanetsmove about the Sun in elliptical orbits, having the Sun as one of the foci. (2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.

Kepler’s laws of planetary motion, inastronomyand classicalphysics, laws describing the motions of theplanetsin thesolar system. They were derived by the German astronomerJohannes Kepler, whose analysis of the observations of the 16th-century Danish astronomerTycho Braheenabled him to announce his first two laws in the year 1609 and a third law nearly a decade later, in 1618. Kepler himself never numbered these laws or specially distinguished them from his other discoveries.

Conservation of momentumis a fundamental law of physics which states that themomentumof a system is constant if there are no external forces acting on the system.Newton's cradleis a device that demonstratesconservation of momentumand energy using a series of swinging spheres. When one sphere at the end is lifted and released, it strikes the stationary spheres, transmitting a force through the stationary spheres that pushes the last sphere upward.

S.I. Unit stands for International standard unit. This International System ofUnits ( SI ) has sevenunits of measure as a basic set from which all other unitscan be derived.

Its importance are:

1. It is universally accepted and hence makes it easy for people from different parts of the country to discuss conveniently about calculations in business, physics, astronomy etc.

2. It has some basic and accepted prefixes which make it easy to represent large numbers easily. For example: 10¹²m = 1 Terameter = 1 TM

3. It helps us to check the dimensions of a formula and hence proof if it can exist or not.

d=100kmt=21hrsv=d/tv=100/21

d=120kmt=d/vt=120/(100/21)t=2520/100t=25.20hrs

ii)t=4hrsv=100/21 km/hrd=vtd=(100/21)*4d=400/21 km

Newton's first law of motion states that an object at rest remains at rest and an object in motion remains in motion with the same velocity unless acted upon by what we call an unbalanced force.

Example :

A ball rolling down a hill will continue to roll unless friction or another force stops it.

direction can be found out just by differentiation of the locus

y² = 2x=> 2ydy/dx = 2 or dy/dx = 1/y

so, at point (2,2) , the value of tan∅ is 1/(2) or ∅ = tan.inv(0.5)

option B.

option 2 is the correct answer

Plz like my answer and accepted as best Plz

the answer is 0.33 i hope you help you

1. it is dynamic as the backward and forward reaction continues at same rate after attaining equilibrium

2.there is no effect of catalyst on eqilibrium as it makes the rate of both backward and forward reaction fast simultaneoustly

Thechargecarrier in most metals is the negatively charged electron (see electron scattering).Mobilityis formally defined as the value of the drift velocity per unit of electric field strength; thus, the faster the particle moves at a given electric field strength, the larger themobility.

A convex lens gives a magnified image of an object when it is placed between the radius of curvature and focal length. Also magnification is more for convex lenses having shorter focal length.

Therefore, for reading small letters, a convex lens of focal length 5 cm should be used.

Birds have a ring if cartilage called hyaline in their wind pipes.

The definitions may refer to thevoltagebetween two conductors of a system, or between any conductor and ground. In electric power transmissionengineering,high voltageis usually considered anyvoltageover approximately 35,000 volts.

Weight may also refer to mass1. Endomorph.2. Mesomorph.3. Ectomorph.

Since kinetic energy is increasing , ans K.E = 1/2*(M)V² SO , velocity will also be increasing.. it meas the the body is accelerating

from graph K.E ∞ t => V² ∞ t or v² = k.t or v = √(kt)so differentiating it for acceleration dv/dt = a = (1/2)√k.(1/√t)

a ∞ 1/√t so acceleration will be decreasing with time.. and hence force will also decrease.

so force will be inversly proportions to velocity.

option B.

by evaporation method

by evaporation metod because the rays of sunlight get evaporate the water and salt remain left

Force is a strength or energy as an attribute of physical action or movement.

ᴘᴜʟʟ ᴏʀ ᴘᴜsʜ ᴏғ ᴀ ʙᴏᴅʏ ɪs ᴄᴀʟʟᴇᴅ ғᴏʀᴄᴇ

Inphysics, aforceis any interaction that, when unopposed, will change themotionof anobject. A force can cause an object withmassto change itsvelocity(which includes to begin moving from astate of rest)

Any external influence which can cause a change in the state of rest or that of uniform motion of body exampl :- push pull etc

pull or push of the body is know as force

if you are satisfied with my answer so please accept me as best please 😫

Push or Pull on a body

In physics, a force is any interaction that, when unopposed, will change the motion of an object. A force can cause an object with mass to change its velocity, i.e., to accelerate. Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity.

Force, in mechanics, any action that tends to maintain or alter the motion of a body or to distort it. The concept of force is commonly explained in terms of Isaac Newton’s three laws of motion set forth in his Principia Mathematica (1687). ..

In science, force is the push or pull on an object with mass that causes it to change velocity (to acceleration). Force represents as a vector ,which means it has both magnitude and direction.

push and pull of any thing is called Force

push and pull of any thing is called force

force is a pull or push oa an object

a force is a pull and push of an object

force is a pull or push oa an object

Push or pull of any body is called force

A force is a push or pull upon an object resulting from the object's interaction with another object. Whenever there is an interaction between two objects, there is a force upon each of the objects.Formula for force is F = ma m is massa is acceleration

Frictionis theforceresisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other. There are several types offriction: Dryfrictionis aforcethat opposes the relative lateral motion of two solid surfaces in contact.

Thisforceis staticfriction force, which is theforceexerted on the surface by another when there is no motion between the two surfaces. Staticfriction forceacts in response to aforcetrying to cause a stationary object to start moving.

Impulse is a quantity that is closely related to momentum. When an object has a momentum, and a force is applied for an amount of time, the momentum can change to a new value. The impulse momentum theorem states that the impulse is equal to this change in momentum.

This is Newton's Second Law in play: Force applied equals rate of change of momentum.

Your confusion stems from the mistaken assumption that the force applied by your hand in both cases is the same. The invariant in both situations is your hand's momentum. In the case of the hard wall, the momentum drops to zero almost instantaneously when compared to the stopping time of the muddy ground.

Another reason you might experience less force when punching softer materials is that the reaction force is distributed over the surface of your fist rather than concentrated on your knuckles.

Force can be defined as a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object.

force can be defined as a push or pull acting on an object results in interaction with another object

Oilismore densethan alcohol, but lessdensethanwater..

so, the order of density will give the order of buoyant force..

glycerol < oil < water.... order of increasing buoyant force.

1)-liquid2)-gas3)-solid4)-dry ice5)-wax

LiquidGasSolidDry IceWax

liquids do not have a definite ________ , but they have