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The mass of the Moon is 7.35*1022 kg and the mass of the Earth is 6.00*1024 kg. The distance between the Moon and the Earth is 3.80*105 km. Since the radius of the Earth is 6378 km, the center of mass of the Earth-Moon system is inside the Earth.

(c) is correct option

The SI unit ofPowerbeing Watt has theDimensional formula M1L2T-3.

Dimensional formula of Angle = M0L0T0. We can also say Angle is dimensionless quantity.

One newtonis the force needed to accelerateonekilogram of mass at the rate ofonemetre per second squared in the direction of the applied force.

Using kinematics eq.v^2 =u^2 - 2as0 = (250 )^2 - 2*0.12*a0.24a=62500a= 62500/0.24nowF = ma= 20/1000 * 62500/0.24solve itF = 5208 NThe answer is Option b.

The input is applied between base and emitter, the output is taken between collector and emitter. Here emitter of the transistor is common to both input and output and hence the name Common Emitter Configuration. Input characteristics are obtained between the input current and input voltage at constant output voltage

kana haba ?you can help me ?please,

distance=speed ×time

The value of the gravitational constant, G, is constant throughout the Universe and is6.6740831313131 x10-11N m2/kg2.And since it is constant it would be the same anywhere in the Universe (including the Earth and the Moon).

TheMeghalaya Plateauthat is actually a spinoff from theDeccan Plateaufeatures hard ancient rocks that are primarily quartzytes. On the other hand, theDeccan Plateauhouses a lotofigneous rocks like metamorphic rocks and graphite that are more volcanic in nature. ... The wholeDeccan plateauslopes from west to east.

½ mv2= eV

m- mass of electrone - charge of electronv- velocityV -voltage

use this formula

Lets say, the force between the mass placed at the centre and the mass "m" at the corner A (say topleft) is F = Gm^2/(a/root[2])^2

So the other forces will be 2F, 3F and 4F towards B,C,D respectively (say B is top right) and so on.

So the resultant Force will be 2root(2)F in the downward direction (vertical)

which is 4root(2)Gm^2/a^2 (vertically downwards. {for this configuratoin of masses).

Put t= 0 in the expression I = 2sin(100πt+π/3)we get I = 2sin(π/3) = 2√3/2 = √3A.

option B

Concave mirrorsareusedin motor vehicle headlights to send out strong beams oflight. Instead of reflecting an image, they areusedto focus thelightfrom the bulb. Rays oflightfrom the bulb are reflected off theconcave mirror, creating a strong beam that shines on the road.

Ans :- Short Sightedness is also called as Myopia .Person having this eye defect can see the near by object clearly but finds difficulty in seeing far things .For myopia eye the image is formed in front of retina.Reasons for this eye defect :

1. Elongated eye ball2. Decrease in focal length of eye lens.

Correction :Concave lens is suggested to correct the eye defect.

The momentum of the cart must be the same, before and after the monkey jumps off. Mm = mass of monkey and Mt = mass of the trolley. (Mm + Mt) * V1 = Mt * V2 V2 = V1 * (Mm + Mt) / Mt V2 = 8 m/s * (20 kg + 40 kg) / 40 kg V2 = 12 m/s, so the answer is (d)

hey Rajit can u plz tell y it cannot be done with law of conservation of energy

renewable energy sources

Thank you

Power of accommodationis the ability of theeyelens to focus near and far objects clearly on the retina by adjusting its focal length.Power of accommodation of the eyeis limited. It implies the focal length of theeyelens cannot be reduced beyond certain minimum limit.

he is suffering from myopia or shortsighted ness.

Convex lens is also called as converging lens as it can converge the refracted rays at one point on principal axis called Focus .It's clear that child used spectacles having convex lens to burn paper as it focused Sunrays at a point.

(1)Child's father is suffer with hypermetropia where he can see far things clearly and finds difficulty in seeing near things Corrective measures used for eyedefect: Doctor suggest convex lens spectacles.

(2)Due to increased in focal length and decrease in eye ball

(3) and (4)

Water is a basic resource that guarantees the life of all living beings on the planet. However, its scarcity and pollution cause millions of people to have poor access to this much-needed asset. Although there are processes such as water treatment or desalination that facilitate its treatment, use and consumption in areas with quality or supply problems, it is first necessary to avoid its contamination.

What are the main consequences of water pollution? Firstly, the disappearance of biodiversity and aquatic ecosystems. Also, humans are harmed by the alteration in the food chain and by contracting illnesses when drinking or using contaminated water. As you can see, water pollution has a great impact in the environment. For all this, we must ensure water availability, its sustainable management and sanitation for all, as reflected in the sixth of the Sustainable Development Goals adopted by the United Nations in the 2030 Agenda.

Humans are the main cause of water pollution, which is triggered in many ways: by the dumping of industrial waste; due to temperature rise, that cause the alteration of water by reducing the oxygen in its composition; Or due to deforestation, which causes sediments and bacteria to appear under the soil and therefore contaminate groundwater. In the same way, the pesticides used in agricultural fields filter through underground channels and reach the consumption networks; And also as a result of accidental spillage of oil.

https://www.activesustainability.com/water/causes-consequences-water-pollution/index.htmlHumans are the main cause of water pollution, which is triggered in many ways: by the dumping of industrial waste; due to temperature rise, that cause the alteration of water by reducing the oxygen in its composition; Or due to deforestation, which causes sediments and bacteria to appear under the soil and therefore contaminate groundwater. In the same way, the pesticides used in agricultural fields filter through underground channels and reach the consumption networks; And also as a result of accidental spillage of oil.

https://www.activesustainability.com/water/causes-consequences-water-pollution/index.htmlHumans are the main cause of water pollution, which is triggered in many ways: by the dumping of industrial waste; due to temperature rise, that cause the alteration of water by reducing the oxygen in its composition; Or due to deforestation, which causes sediments and bacteria to appear under the soil and therefore contaminate groundwater. In the same way, the pesticides used in agricultural fields filter through underground channels and reach the consumption networks; And also as a result of accidental spillage of oil.

https://www.activesustainability.com/water/causes-consequences-water-pollution/index.htmlHumans are the main cause of water pollution, which is triggered in many ways: by the dumping of industrial waste; due to temperature rise, that cause the alteration of water by reducing the oxygen in its composition; Or due to deforestation, which causes sediments and bacteria to appear under the soil and therefore contaminate groundwater. In the same way, the pesticides used in agricultural fields filter through underground channels and reach the consumption networks; And also as a result of accidental spillage of oil.

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Invest in noise friendly flooringTurn off the electronic or reduce the volumePlant trees.Trees have been established to be effective in reducing noise levels within urban settings, around major highways, and even at the places we stay. Therefore, numerousplants and treesin an area mean less noise pollution. In addition to that, trees have various aesthetic advantages and improve air quality.

Have a dedicated quiet space.Having a dedicated quite space can pay off whenever we want to escape the noises that make us uncomfortable and reduce the quality of life. Quite spaces can guarantee as much as 100% soundproof areas.Replacement of old automobiles with new ones.

Creating awareness and education on the consequences of noise pollution.The creation of awareness on noise pollution and its effects on both humans andwildlifecan generate positive outcomes on efforts to reduce noise pollution. Perhaps if most people could be aware that noise pollution can lead to hearing loss and mental stress, then majority will invest in ways to reduce noise pollution.

(b) Virtual, behind the mirror and of the same size as the object

The image formed by a plane mirror is virtual, behind the mirror and of the same size because it cannot be projected on a screen.

Gauss's law in electrostatics statesthat the total electric flux through a closed surface is equal to the net electric charge enclosed by the surface divided by permittivity.

N/m²= 0.1dyn/cm²

hence, using unitary method-

value of g at earth surface 9.8 m/s^-2gat surface of earth = (G*M /R^2 ) whereGis universal gravitational constant and M is mass of the earth and R is radius of the earth or (simply the distance of a object from the centre of earth ) ..ifgshould behalfthat experienced at the surface then R becomes √2 times R .Nov 4, 2018

hence P is directly proportional to masshence it will become double.

A denser liquid excerts more pressure. this is call osmotic pressure

The atmospheric pressure increases with altitude.

The two streams of protons are both positively charged and hence they repel each other because like charges repel each other and opposite charges attract each other.

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The Coulomb's law of force between two electrically charged particles : q₁ , q₂ = electric charges on the two particles. r = distance between two particles = 0.1 m the particles are assumed to be point sized. Force F = 18 N

q₁ + q₂ = 9 μ C --- (1)

1st option is correct