Explore topic-wise InterviewSolutions in .

photo electric effect is a form of particle nature of light

a) uniform motionb) inertia. Tendency of a body to resist a change in it's state of motion or of rest.

Change in speed will be 0' because its given constant

also, there is change in Velocity, due to change in direction, after half revolution

so, ∆v = 15-(-15) = 30 m/s

option 2

in this question you have to use scale to emasure the distance for west direction add the horizontal distance and then multiply by 100 because we are given that 1cm = 100mfor south measure the vertical distance with scale and multipy by 100

that's not the answer that's a hint I need the answer

we can't get exact measurements from the pic that's why I gave hint to solve.and also it's more than hint

(A) 40/3 m

The answer is option (1)

The energy responsible for large energy production in sun is 'Nuclear energy' causing the transition of hydrogen to helium. Occurrence of Nuclear fusion reactions causes release of energy.

Theenergy responsible for large energy productioninsunis 'Nuclear energy' causing the transition of hydrogen to helium. Occurrence of Nuclear fusionreactionscauses release ofenergy.

hit like if you find it useful

V = 144*5/18 = 40m/sv = u+at => a = V-0/20 = 40/20 = 2 m/s²

using Newton's 2nd formula of motion

S = 1/2*(a)*(t)²S = 1/2*(2)*(20)² = 400m

option 2

Heat energyis the result of the movement of tiny particles called atoms, molecules or ions in solids, liquids and gases.Heat energycan be transferred from one object to another. Thetransferor flow due to the difference in temperature between the two objects is calledheat.

average speed =40+20/5+8=60/13 m/secas average speed =total distance/total time

Sound is a mechanical wave . It needs the vibration of molecules for propagation. Moon has no atmosphere like earth so there is no sound in moon

1)In air: Wind can increase or decrease the speed, and can even push sound waves sideways. Air density affects it.Temperature, pressure, humidity and gas mixture can each affect the density. In liquid: The speed of sound is affected by density and viscosity.

Please like the solution if it's helpful

Ans :- Alloyslike constantan and manganin areused to make standardresistance coils because: 1. They have a very high value of resistivity. ... The contact potential ofalloyswith copper is very small.

1. Brass it is alloy of copper and zinc.Brass is used in making utensils and scientific equipment.

2. Solder : it is an alloy of lead and tin.It is used in soldering wire together

sound cannot propagate through vaccum or empty space because vaccum has no melecules which cannot vibrate and carry sound waves

Given :mass of each ball = m kgvelocity= u m/sIn elastic collision :Change in momentum= mu-(-mu)=mu+mu=2muFor N balls change in momentum:Δp=N*2mu

Rate of change of momentum=Δp/t=N2mu/1 sec=N2mu

According to Netwon's Second LawF=Δp/t

F=N2mu

B..........................

Given, power of pump = 2kW =2000W

Time (t)= 60sec

Height (h) = 20m

g = 10m/s2

As you know, power =work done per unit time.

Work done = mgh = m ×10×20 =100m

Therefore, 2000W = 200m/60s

Therefore, m = 600kg

So, the pump can raise 600kg of water in one minute.

A type ofwavemotion in which the particles displacement ofwave isparallel to the direction ofwavepropagationiscalled alongitudinal wave. Itcan be producedin solid, liquid as well as gases.

It is a type of wave motion in which the particales displacement of wave is parallel to the direction of wave propagation is called

It is a type of wave motion in which the particles displacement of wave is parallel to the direction of wave propagation is called gasws

A type os wave motionin which the particles displacement of wave is paralllel

Yeh

It a wave in which the medium vibrates at right angles to the direction of its propagation.

1.Consider a stretched string and if given transverse disturbance on one end then the disturbance travels throughout the string.

2.Thereby giving rise to transverse waves.

3.The particles move up and down and the waves travel perpendicular to the oscillation of the particles.

4.Transverse wave speed determined by:

5.Mass per unit length- As mass gives rise to Kinetic energy.If no mass then no kinetic energy.Then there will be no velocity.

6.It is denoted by μ.

7.Tension-Tension is the key factor which makes the disturbance propagates along the string.

8.Because of tension the disturbance travels throughout the wave.

9.It is denoted by T.

Pottassium Permanganate (KMnO4) is prepared fromPyrolusite ore (MnO2). The finely powdered Pyrolusite ore(MnO2) is fused with an alkali metal hydroxide like KOH in the presence ofairor an oxidizing agent like KNO3 to give the dark green potassium Manganate (K2MnO4).

Biology is the natural science that studies life and living organisms, including their physical structure, chemical processes, molecular interactions, physiological mechanisms, development and evolution.

Root pressureis the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves.

Root pressure occurs in thexylemof somevascular plantswhen the soil moisture level is high either at night or whentranspirationis low during the day.

When transpiration is high, xylem sap is usually under tension, rather than under pressure, due totranspirational pull. At night in some plants, root pressure causesguttationor exudation of drops of xylem sap from the tips or edges of leaves.

The area under the sharp knife is less than the area under the blunt knife. Hence, the pressure exerted by the sharp knife is more than the pressure exerted by the blunt knife on an object. Therefore, when a same amount of force is applied on both the knives, the sharp knife penetrates deeper into the object than the blunt knife.

the sharp knife has less area than blunt knife (less area =more amount of force) and blunt knife has large area than sharp knife (large area= less amount of force)... so easy😉😉😉😉😉😉😉😉

A sharp knifecuts objectsbetterbecause due to its very thin edge, the force of our hand falls overa sharpsmall area of the object producing a large pressure. ... Ablunt knifehas a thicker edge and does not cut the object easily.

THE ROADS ON MOUNTAINS HAVE INWARD INCLINATION AT SHARP TURN BECAUSE When a vehicle moves along horizontal curved road on a mountain necessary centripetal force is supplied by the force of friction between the wheels of vehicle and surface of road.To increase the centripetal force the road should be made rough. Thus, due to lack of centripetal force vehicle tends to skid.When the roads on moutain have inward inclination at sharp turn, the horizontal component of the normal reaction provides the necessary centripetal force required for circular motion of vehicle.

Thus, to provide the necessary centripetal force at the curved road on at mountains have inward inclination at sharp turn.

hit like if you find it useful

Option A is correct.

10×5 = 50 mitar

As India is a developing country with large population,so the landholdings in India are generally small.

Axial vectors describe rotational motion, and act along the axis of rotation (according to right hand screw rule).Torque, Angular velocity, angular acceleration are axial vectors.Polar vectors describe translation motion and have starting point.The direction of polar vector remains unchanged irrespective of the coordinate system chosen.Displacement, force, etc are polar vectors

what is right hand screw rule we are applying for angular displacement, angular velocity, angular acceleration

In geometry,coaxialmeans that two or more three-dimensional linear forms share a common axis. ... Acoaxialcable, as a common example, is a three-dimensional linear structure.Coaxialcable isused asa transmission line for radio frequency signals. Its applications include feedlines connecting radio transmitters and receivers with their antennas, computer network (Internet) connections, digital audio (S/PDIF), and distributing cable television signals.

Due to severecoldwhenwaterfreezes,itsvolume increases and can burst the capillaries in plants.Waterin thefielddue toitsvery high specific heat capacitydoesnot allow thewaterin capillaries to freeze.