Explore topic-wise InterviewSolutions in Current Affairs.

ong>Answer:

Relationship to Linear Thermal Expansion Coefficient

For isotropic material, and for SMALL expansions, the linear thermal expansion coefficient is ONE third the volumetric coefficient. To DERIVE the relationship, let's take a cube of steel that has sides of length L.

ong>Answer:

When WHITE light is passed through a GLASS prism it SPLITS into its spectrum of colours and this process of white light splitting into its CONSTITUENT colours is termed as dispersion.

violet, indigo, blue, green, yellow, orange and RED

ong>ANSWER:

Voltage READING in VOLTMETER is 150/11 V.

Ideally a voltmeter will have infinite resistance.

ong>Answer:

HOPE it HELPS

Explanation:

SANA po makatulong

ong>ANSWER:

for PREPARATION of soda water carbon dioxide is used.

EXPLANATION:

The plane MIRRORS and the parallel MIRROR is always EQUAL

Answer:

• ANGLE of incidence on the first mirror = 10°
• Angle of incidence on the SECOND mirror = 40°

Explanation:

P.F.A the solution below.

Solved with all the necessary steps. Hope you got the FULL answer.

Kindly mention your class below in the comment section.  

THANK You.

r to the attachment first for better understanding!

(1)

Net force acting on the vehicle,

DIVIDING (2) and (1) we get,

Now let's DIVIDE the numerator and denominator of the L.H.S by N cos θ,

We KNOW that,

Hence,

When there is no friction acting between the road and the tire the coefficient of friction (μ) will be ZERO.

Hence the maximum safety speed with which a vehicle can be safely driven along a curved banked road is,

(2)

On rearranging the above EQUATION we get,

From the above equation, we can conclude that the angle of banking doesn't depend upon the mass of the vehicle.

13 is the correct answer

EXPLANATION:

PUT the magnitude of all variable underoot with SQUARING

55mlVolume of 20 g of hydrogen at NTP = 240.55 ml.

Explanation:

MARK me brilliant plz

ong>Answer:

224

Explanation:

Volume of Hydrogen = 10 X 22.4lt.

224

please mark as BRAINLIEST

Question (a):-

Given:-

• Weight of person on the Moon is 110.84 N.

• Acceleration due to gravity of the moon is 1/6 of the earth.

• Value of ' g ' on the earth is 9.8 m/s².

To Find:-

• ' g ' on the moon.

• mass of person on moon.

• weight of person on the earth.

Solution:-

(1)   Here, We know that acceleration due to gravity of the moon is 1/6 of the earth.

And, Acceleration due to gravity of the earth is " 9.8 m/s² ".

So,

⇒  

⇒  1.63 m/s²    

Hence, Acceleration due to gravity on the moon is 1.63 m/s².

(2)  Relation between mass and weight:-

Weight = Mass × Acceleration due to gravity of that body

So, putting the respective value we get,

110.84 N = Mass × 1.63 m/s²

Mass =

Mass = 68 kg

Hence, Mass of the body on the moon is 68 kg.

(3) From above relation between mass and weight:-

We get,

Weight = 68 kg × 9.8 m/s²     [ Since mass is CONSTANT of any body on any planet ]

Weight = 666.4 N

Hence, Weight of the body on the earth is 666.4 N.

Question (b) Solution:-

Here, Let we drop a body of mass m from a distance of R from the CENTER of the Earth of mass M, then the force exerted by the earth on the body is given by law of gravitation as :-

               --------------------- (1)

Now, The force exerted to produce acceleration in the body due to which the body moves downwards is given by :-

So, Acceleration of the body =            --------------- (2)

Now, Putting the value of force F from equation (1) in the above relation, We get:-

        Acceleration,  

         or                    

Since, The acceleration produced by the earth is known as acceleration due to gravity and represented by the symbol g. So, by writing 'g' in place of 'a' in the above equation, we get :

Acceleration due to gravity,  

                            Where, G = gravitational constant

                                         M = mass of the earth

                                          R = Radius of the earth

Hence, That's how the value of g on the earth is related to the mass of the earth and it's radius.

4.54×10

14

m/s

Explanation:

I THINK you UNDERSTAND

a) QUININE

Explanation:

Quinine is an alkaloid DERIVED from the bark of the cinchona tree.

☆ Hope this helps

ong>Answer:

your answer is here :

EXPLANATION:

There are 3 main factors that AFFECT air pressure are: Temperature, Altitude or elevation moisture water vapourr

ong>ANSWER:

All of the energy from the Sun that reaches the Earth arrives as solar RADIATION, part of a LARGE COLLECTION of energy called the electromagnetic radiation spectrum. Solar radiation includes VISIBLE light, ultraviolet light, infrared, radio waves, X-rays, and gamma rays. Radiation is one way to transfer heat.

Explanation:

please mark as brainliest

ong>ANSWER:

B is the answer = The SPEED of sound decreases with increases in HUMIDITY

ong>Answer:

equally with ELECTRIC and magnetic fields

Explanation:

The energy in an electromagnetic WAVE is tied up in the electric and magnetic fields. In general, the energy PER unit volume in an electric field is given by:

energy density in electric field=

2

1

ϵ

0

E

2

In a magnetic field, the energy per unit volume is:

energy density in magnetic field=

2μ

0

1B

2

An electromagnetic wave has both electric and magnetic fields, so the TOTAL energy density ASSOCIATED with an electromagnetic wave is:

u=

2

1

ϵ

0

E

2

+

2μ

0

1B

2

It turns out that for an electromagnetic wave, the energy associated with the electric field is equal to the energy associated with the magnetic field, so the energy density can be written in terms of just one or the other:

u=

2

1

ϵ

0

E

2

=

2μ

0

1B

2

This also implies that in an electromagnetic wave, E = cB.

OPTION B is correct answer

right HAND rule states that: to determine the direction of the MAGNETIC force on a positive moving CHARGE, point your right thumb in the direction of the velocity (v), your index finger in the direction of the magnetic field (B), and your middle finger will point in the direction of the the resulting magnetic force .

ong>Explanation:

Potential energy, stored energy that DEPENDS upon the RELATIVE position of various PARTS of a SYSTEM. A spring has more potential energy when it is compressed or stretched. A steel ball has more potential energy raised above the ground than it has after FALLING to Earth.

The upward force opposing gravity is the TENSION (T) in the string. For the SYSTEM to be in EQUILIBRIUM, T = Fg. The net force is 2Fg - 2T = 0, so there is no acceleration. The tension in the string is 2T or 2Fg.

ong>Answer:

H exhibits properties of both, ALKALI METALS like, 1 valence electron, ability to form halides etc. and those of halogens like non-metal, diatomic molecule, gaseous state etc. Hence it position is not fixed in the periodic table and called as a ROGUE element.

ong>Photosynthesis, the process by which green plants and CERTAIN other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and MINERALS into OXYGEN and energy-rich organic compounds.

Hope it is helpful for you!!

Alee !!

ye baar baar KYU kr te ho YRRR !!

any problem ??

ong>Answer:

no POSSIBLE SIMPLE possible but IMPOSSIBLE

ong>ANSWER:

zero resistance

An ideal ammeter has zero resistance. A “clamp-on” ammeter MEASURES current through a wire by MEASURING the strength of the magnetic field around it RATHER than by becoming part of the circuit, MAKING it an ideal ammeter.

ong>Answer:

3.) any two BODIES having some mass.

Explanation:

HOPE,this will HELP you.

ong>Answer:

Normally it is a common feeling that we are adding two bulbs in series and so their consumption should add up. But, when we make a series CONNECTION, both the bulbs do not get 250V because of voltage DROP for series connection.

Power varies in SQUARE of the available voltage across the terminals of the BULB. In practical life also when you add the bulbs in series you see the glow is diminished as voltage available at the terminals are much less than the supply voltage.

For the given PROBLEM calculate the resistance of the bulbs by R=V^2/W. Get the series current by I= 250/(R1+R2) and then calculate total power by W=I^2*(R1+R2).

ong>Answer:

UNIT CO efficient of coupling is (k)

Explanation:

From

ong>Answer:

Gametic isolation- During sexual REPRODUCTION, the female egg is fused with the male SPERM and together they create a zygote. If the sperm and egg are not compatible, this FERTILIZATION cannot occur and the zygote will not form. ... Other times, the sperm just cannot penetrate the egg because of its own chemical make up.

104 DEGREES FAHRENHEIT =

40 degrees celsius

104 degrees fahrenheit =

313.15 kelvins

ong>The amount of work done to MOVE an object in a closed vertical CIRCLE on the surface of the earth is zero because the displacement of the object is zero.

• Work done by a FORCE in displacing a body by a small DISTANCE is given by:

• When the displacement of the body is zero the product of force and displacement becomes zero and work done by force also becomes zero.
• As the object moves in a closed vertical circle the initial position of the object is the same as the FINAL position. And the displacement of the particle is zero.
• The force by the gravitational pull of the earth is and the displacement is 0 then the work done is given by:                        

A person in a superfast rocket will measure time to be moving SLOWER and the lengths of objects to be shorter COMPARED with a person traveling at a much slower speed. That's because SPACE and time are relative — they depend on an observer's speed. But the speed of light is more fundamental than either.

ong>Answer:

The SUITABLE focal LENGTH of the convex lens used as magnifying lens to read “Hallmark 916'' WRITTEN on ornaments is : A. 12 cm.

ong>Answer:

In silver PLATING, the object to be plated (e.g., a spoon) is made from the cathode of an electrolytic cell. The anode is a bar of silver metal, and the ELECTROLYTE (the LIQUID in between the electrodes) is a solution of silver cyanide, AgCN, in WATER.

To add or subtract two VECTORS, add or subtract the corresponding COMPONENTS. LET →u=⟨u1,u2⟩ and →v=⟨v1,v2⟩ be two vectors. The sum of two or more vectors is CALLED the resultant. The resultant of two vectors can be found using either the parallelogram method or the triangle method .

I do not have dear

vdjskwjs

PLEASE MARK as brainilist please

ong>ANSWER:

c) is FALSE and a) B) and d) are true

Explanation:

100% correct answer.bcs

In conclusion, plane mirrors produce images with a number of distinguishable characteristics. Images FORMED by plane mirrors are VIRTUAL, upright, left-right reversed, the same distance from the mirror as the object's distance, and the same size as the object.

ong>Answer: In physics, electromagnetic radiation (EM radiation or EMR) refers to the WAVES (or their QUANTA, photons) of the electromagnetic field, propagating (radiating) through space, carrying electromagnetic radiant energy. It includes radio waves, microwaves, infrared, (visible) light, ultraviolet, X-rays, and gamma rays.

Explanation: Electromagnetic radiation is an electric and magnetic disturbance traveling through space at the speed of light (2.998 × 108 m/s). It contains neither mass nor charge but travels in packets of radiant energy CALLED photons, or quanta. Examples of EM radiation include radio waves and microwaves, as well as infrared, ultraviolet, gamma, and x-rays. Some sources of EM radiation include sources in the cosmos (e.g., the sun and stars), radioactive elements, and manufactured devices. EM exhibits a dual WAVE and particle nature.

Electromagnetic radiation travels in a waveform at a constant speed.

Thankyou

ong>Answer:

FORCE :125 NEWTON in the direction of the force

ong>ANSWER:

Newton's first law states that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted UPON by a force. This postulate is known as the law of inertia.

Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass.

Newton's third law: If an object A exerts a force on object B, then object B must exert a force of EQUAL magnitude and opposite direction back on object A. ... We SOMETIMES refer to this law loosely as action-reaction, where the force exerted is the action and the force experienced as a consequence is the reaction.

with an INDUCTANCE of 0.25 H across 220 V,

50 Hz AC Supply. Find the CURRENT through

the circuit and the POWER factor

I=2.2 A, pf = 0.875 (lag)

I = 2.75 A, pf = 0.875 (lag)

| = 2.75 A, pf = 0.1875 (lag)

| = 2.75 A, pf = 0.1875 (lead)

ong>Answer:

agar HELP HO to like FOLLOW and BRILLIANT karna

ong>ANSWER:

xxn

dmd

Explanation:

NZN GOOD night good night

ong>Answer:

In pendulum a compound pendulum has an extended mass, like a swinging BAR, and is free to oscillate about a HORIZONTAL axis. A special reversible compound pendulum called KATER’s pendulum is designed to measure the VALUE of g, the acceleration of gravity.

Explanation:

Mark me as brainliest.