Explore topic-wise InterviewSolutions in .

4cm behind the mirror

4cm behind the mirror

Origin vector is ( 1i+1j) and F = 5√3i + 5j

so, T = F×r = (5√3i+5j)×(i+j) = (5√3 - 5)k = 5(√3-1)k N-m

option 3

option B

Angular acceleration, also called rotational acceleration, is a quantitative expression of the change in angular velocity that a spinning object undergoes per unit time. It is a vector quantity, consisting of a magnitude component and either of two defined directions

Angular velocity is the rate of velocity at which an object or a particle is rotating around a specific point.

Angular Dispersion: D &Dispersive Power: w. The capacity of the material of a prism, to disperse a given beam of light into of its constituent colors, is measured by the two quantities D & w; which aredefinedas. D = It is the difference between the angles of minimum deviations for a pair.

Dispersive power. : thepowerof a transparent medium to separate different colors of light by refraction as measured by the difference in refractivity for two specified widely differing wavelengths divided by the refractivity at some specified intermediate wavelength.

Any other detail provided?

no

V=IR. SO. I=V/RSO I1=V1/R1 ANDI2=V2/R2AND. I3=V3/R3 AND PUT THE VALUE OF I1,I2,I3,V1,V2,V3,R1,R2,R3 AND YOU FIND THE VALUE OF I1,I2,I3

The electric field is strongest near the pointed tip of an electrical conductor, and sotrees oftenmake forgreattargets forlightning strikes.. Standingout ina fieldfarfromtrees may also pose risks too.Inthis case,you arethetallestobject around and maybea target forlightningstrikes.

tall trees attract the lightning force more.

c is the right answer

Linear momentumisdefinedas the product of a system's mass multiplied by itsvelocity.Momentump is a vector having the same direction as the velocity v. TheSI unitformomentumis kgm/s.

1. A conservative force is a force with the property that the total work done in moving a particle between two points is independent of the taken path.

2. The center of mass is a position defined relative to an object or system of objects. It is the average position of all the parts of the system, weighted according to their masses.

Ans :- There are many reasons for it but some reasons are important which i want to share with you all:- 1. As you know, the demand of energy is increasing day by day due to increase population and growing use of machine and industrial in order to improve our living standard.

2. the fossil fuels are the non-renewable source of energy and formed million year ago . and it it the fact that fossil fuels are the limited source and it will finish after some years. hence, we have to need to harness of non-conventional source of energy.

PLEASE LIKE THE ANSWER

the answer is 3/4 m rsquare omega

its a true statement

Momentum = mass * velocity.

Total momentum of a system is always conserved. During a collision, momentum lost by one body is gained by another body. During a collision , assume F1 and F 2 be the forces acting on the two bodies. Assuming that only one collision takes place and assuming it to be an isolated system , F1= -F2 (Newtons 3rd law).

But the collision time is the same for both the bodies, t1 = t2.

Momentum of body 1 = F1*t1 and body 2 = F2*t2

F1*t1 = F1*t2 = -F2*t2 ,

Impulse = F * t , thus Impulse 1 = - Impulse 2

Impulse = change in momentum (by second law of Newton) , thus , m1 * v1 = - m2 * v2 , thus this implies momentum gained by one body = momentum lost by another body.

Hooke's law is a law of physics that states that the force needed to extend or compress a spring by some distance x scales linearly with respect to that distance. That is, where k is a constant factor characteristic of the spring: its stiffness, and x is small compared to the total possible deformation of the spring.

According to Bohr’s model, the electron revolves revolve in stationary orbits where the angular momentum of electron is an integral multiple of h/2π.

mvr = nh/2π ------------------(1)

Here, h is Planck's constant.

Now, when an electron jumps from an orbit of higher energy E2 to an orbit of lower energy E1, it emits a photon. The energy of the photon is E2-E1. The relation between wavelength of the emitted radiation and energy of photon is given by the Einstein - Planck equation.

E2-E1= hν = hc/λ -------------(2)

For an electron of hydrogen moving with a constant speed v along a circle of radius R with the center at the nucleus, the force acting on the electron according to Coulomb’s law is:

F = e2/4πε0R2

The acceleration of the electron is given by v2/r. If m is the mass of the electron, then according to Newton’s law:

e2/4πε0r2 = mv2/R ---------(3)

mv = [(1/4πε0) (me2/R)]1/2 ------(4)

From equation (1) and (4) we get,

{[(1/4πε0) (me2/R)]1/2}2 x R2 = n2h2/22π2

R = (4πε0)n2h2 / 4π2me2

For nth orbit,

Rn = ε0n2h2 / πme2

1. They are inexhaustible and renewable.

2. They are obtained at low cost and can be used to meet the ever growing demands of population.

3. If we use non conventional energy sources we can save resources for our future generation. We should move towards sustainable development.

4. As we know conventional sources of energy can't be renewed that's why we should not use it in large amount.

Hydroelectric Energy.Solar Energy.Wind Energy.Biomass Energy.Geothermal Energy.

Thnx

Thezeroth law of thermodynamicsstates that if twothermodynamic systems are each in thermal equilibrium with a third, then they are in thermal equilibrium with each other. Accordingly, thermal equilibrium between systems is a transitive relation.

sorry samajh nhi aayaplease aur easily explain krdo

1 doubt hai kya thermal equlibrium main equally heat transfer hogi?

thermal equilibrium. The condition under which two substances in physical contact with each other exchange no heat energy. Two substances inthermal equilibriumare said to be at the same temperature

Thezeroth law of thermodynamicsstates that if twothermodynamic systemseach are inthermal equilibriumwith a third one, then they are in thermal equilibrium with each other. Accordingly, thermal equilibrium between systems is atransitive relation.

Two systems are said to be in the relation of thermal equilibrium if they are linked by a wall permeable only to heat and they do not change over time. As a convenience of language, systems are sometimes also said to be in a relation of thermal equilibrium if they are not linked so as to be able to transfer heat to each other, but would still not do so (even) if they were connected by a wall permeable only to heat.

Please hit the like button if this helped you

Zeroth law of thermodynamics: “If two systems are in thermal equilibrium with a third system then they must be in thermal equilibrium with each other” is called the Zeroth law of thermodynamics. It forms the basis of concept of temperature.

option 4

X=(1*2+3*-6)/(1+3) = (2-18)/4 =-4i

Y=(1*5+3*4)/(1+3) = (5+12)/4 =4.25j

Z=(1*13+3*-2)/(1+3) = (13-6)/4 =1.75k

C.M.= -4i + 4.25j + 1.75k

Ohm's lawstates that the current through a conductor between two points is directly proportional to the voltage across the two points at constant temperature.

I=V/RAt constant temperatureCurrent is proportional to voltage and invesly proportion to Resistance.