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student-name Salini MUKHERJEE asked in Physics

a satellite is orbiting the earth with speed v0.To make the satellite escape,what should be the minimum % increase in its velocity?

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student-name Neha Sarin answered this

409 helpful votes in Physics, Class XII-Science

we know that

orbital velocity

vo= √(g.r)

escape velocity

ve = √(2g.r)

thus, the increase in velocity WOULD be

dv = ve - vo = √(2g.r) - √(g.r)

or

dv = (√2 - √1).√(g.r)

so,

dv = 0.414√(g.r)

now,

the percentage increse would be

% dv = [(ve - vo) / vo ] x 100

= (dv / vo) x 100

or

= [0.414√(g.r) / √(g.r)] x 100

so, we get

% dv = 0.414 x 100 = 41.4%

Heyy here is ur ans...

Pa = thrust/area

Area = 2cm^2 = 2/100×100m

Pa = 45/2/100×100

Pa = 45 × 100 × 100 / 2

Pa = 50 × 100 × 45

Pa = 5000 × 45

Pa = 225000pascals..

hope it helps u....THANKS...!!!

Here is UR ANSWER... FRIEND

Hey!!

here is your ANSWER ✍✍✍

Kinetic energy is the energy an object has because of its motion.

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Hola User__________________

Here is Your Answer..!!!
___________________________

⭐Actually welcome to the concept of the MODERN PHYSICS..

⭐Basically According to the Bohrs Model of atom ...

⭐The second Postulate states that...

⭐The Angular momentum of the ELECTRON In nth orbit is given as the n times integral MULTIPLE of the nh/2pi


⭐Thus we can say that...

⭐L = nh/2 pi

⭐thus this implies ..

⭐mvr = nh/2 pi

____________________________

Hope it HELPS u...l☺

Both optical pumping and electric pumping ate methods for population inversion.

# Optical pumping:
In this, the population inversion is achieved by means of light energy DELIVERED from APPROPRIATE pumping source such as gaseous discharge or flash TUBES. For example, in ruby laser, xenon flash tube is used.

# Electric pumping-
This type of pumping accomplished by means of intense electrical discharge in the MEDIUM and is particularly suited to gas media like He-Ne laser and CO2 laser. The electric discharge coverts the gas into a plasma where ACTIVE centers collide inelastically with free electrons and population inversion is achieved.

Hope i cleared your doubts...

In 20 the correct OPTION is D as for work DONE over an inclined PLANE the FORMULA is MG(sin theeta + mewcos theeta)

I THINK you are ANSWER is

C

Metal tools are HEATED to expend the opening where the handle is inserted . once heated, the handle is inserted and the metal CONTRACTS to MAKE a tight FIT keeps the head from FLYING off and punching through the windshield.

Answer:

Known Terms:-

KWh = KILOWATT hour

W =  Watt

Given:-

Power consumed by four device = 500 W = = 0.5 kW

Time taken to consume the devices = 10 hours

To FIND:-

Energy consumed.

Formula to be used:-

Power = Energy/Time

Solution:-

Power = Energy/Time

Energy = Power × Time

Putting all the values, we get

Energy = 0.5 × 10

Energy = 5 kWh

Energy consumed by four devices

= 4 × 5

= 20 KWh or (20 units)

HENCE, Energy in kWh consumed in 10 hrs by four devices is 20 KWh

little addition to the above answer. gravitation ACCELERATION is GRAVITATIONAL force and WEIGHT are all the same.mass is constant for an object . the other THREE factors varies from place to place. mass the odd one out

Answer is 5 times

Because we have to CHANGE direction the NUMBER of CORNERS in it

We know, RELATION between polarising ANGLE and CRITICAL angle.
e.g.,

Where i is angle of polarisation and C is the critical and of the TRANSPARENT crystal.

so, tani = 1/sin30° = 1/(1/2) = 2
i = tan^-1(2)

hence, angle of polarisation is tan^-1(2)

The SUBJECTIVE PROPERTY of SOUND related to its frequency is. The subjective property of sound related to its frequency is Pitch. Pitch is that characteristic of sound by which an acute or a shrill note can be distinguished from a grave or a FLAT note.

Magnetic bearing: using magnetic compass readings to navigate from beginning to end points on the Earth’s SURFACE. magnetic compass readings show the user where the magnetic poles are in relation to their own location at a certain time and show that using minutes and seconds of arc. but the North and South Magnetic poles on a map are not located at the VERTICAL axes.

“True bearing” refers to the geometric lines which also define loci on the surface of the earth and are thought of as “true” because they never move like the Magnetic Poles and because the North and South Geographical poles are PRECISELY opposite “points” on the SPHERICAL Earth.

hope its helpfull BRAINLIEST please

its TRUE TWO BALLS hanging from a PENDULUM of the same length go back to POSITION 0.8

Hey there....


I am here to answer you .

check out the pic and get your answer with an APPROPRIATE solution my dear...

hope it will be HELPFUL for you...

GLAD to help you...

I am in CLASS 11th..
and that's a question of class 12TH..pls mark as brainliest.

Work, in physics, MEASURE of energy TRANSFER that occurs when an object is moved over a DISTANCE by an external force at least part of which is applied in the DIRECTION of the displacement.

⭐⭐Hey mate!⭐⭐

✍️__________________________________________________________

Near the orbit at

H~0

Orbital velocity = V√Gme/Re

Hence,

V1/V2 = √r2/r1

It there R from EARTH is also EQUAL..

Then,

Then

V1 =V2

Hope it will help you...

#PHOENIX

Hi

Energy : Energy is the capacity for doing WORK .

The different froms of energy are as FOLLOWS :


POTENTIAL energy

Kinetic energy

Thermal energy

ELECTRICAL energy

Chemical energy

Nuclear energy


Energy can neither be created nor be destroyed. it can only change into ONE form to another form.

(1) 5 In, it's UR ANSWER ? I HOPE it

If the red LIGHT REPLACED by blue light then the DIFFRACTION band becomes NARROWER and CROWDED together because the diffraction band depends on the wavelength. Blue light has less wavelength than red light. Therefore, it becomes narrower and crowded together

HEY MATE!

ELEMENT-CARBON

ALLPTROPE A-DIAMOND

ALLOTROPE B-GRAPHITE

THE REASON FOR THE DIFFERENT PROPERTIES IS DUE TO STRUCTURAL AND MOLECULAR DIFFERENCE BETWEEN THEM.

I HOPE IT HELPS YOU!

Metaphysics is a major branch of philosophy. It ISSUES existence and therefore the nature of things that exist. Altogether it's a theory of reality. metaphysics is that the a part of philosophy that discusses what exists: the classes of being. philosophy is that branch of philosophy that studies queries of being, becoming, existence, reality and therefore the nature of 'entities', 'objects' and different 'things'. The word "metaphysics" comes from 2 Greek words that, together, virtually mean "after physics". Areas of metaphysical studies EMBODY metaphysics, cosmology, and often, philosophy. Metaphysical - Longer definition: philosophy could be a form of philosophy or study that uses broad ideas to assist outline reality and our understanding of it.

Outline of a metaphysical conception of CONTEMPORARY science is conferred during which a BASIC distinction is drawn between scientific principles, laws and theories. On this read, metaphysics principles, instead of e.g. empirical knowledge, represent the core of science. the foremost basic of those principles area unit 3 in variety, being, a lot of significantly

(A) The principle of the uniformity of nature,

(B) The principle of the permanence of substance, and

(C) The principle of relation.

These 3 principles set basic constraints on the methodology of each empirical and theoretical science. The uniformity principle is central to the empirical side of science, suggesting a technique consisting within the decide to discover empirical laws, whereas the relation principle is central to the theoretical side of science, suggesting the postulation of scientific theories capable of indicating the causative basis of the laws. and therefore the permanence principle functions thus on type a bridge between the theories and therefore the laws. By distinctive between principles, laws and theories during this means, a dimension is interplanetary to the analysis of contemporary science that permits for a a lot of realistic account of its nature.

Refraction of light is the phenomena by which a single mono chromatic source of light IMAGE AREA which is deviated by another medium BUILD it PASSES through it this is easily seen when will look through the one side of a glass at a pencil on the other side


to do an experiment to observe refraction we use a laser and soap SOLUTION replace the breaker containing soap solution honest and with a white background behind a2b than sign the laser lights directly at the soap solution and observe it from the side against the white background


we will be able to observe the refraction of light to when we look at the given set up however play question must be taken that one does not directly look into the laser as it will damage the eye and its sensory Nerve cells

Newton 's law UNIVERSAL gravitation STATES that every. Lost in the universe ATTRACT every other point mass with the force that is directly PROPORTIONAL to the product of their masses and INVERSELY proportional to the square of the distance between them

I road SURFACE or pavement is that DURABLE surface MATERIAL let down on an area INTENDED to sustain vehicular or foot TRAFFIC such as a road or walkway

The most IMPORTANT purpose of the political MAP is to show territorial borders :the purpose of the physical is the show features of GEOGRAPHY such as mountain SOIL type or land use including infrastructure such as Road, rail road and BUILDING

Other LAWS of NEWTON can be derived from Newton's second law. Hence it is called REAL law of Newton

For eg…

2nd law is…F=ma

And 1ST law is …initial velocity=final velocity

Assume that force acting on body is zero

F=ma

so…0= ma

0/m = a

0=a

0= (v-u)/t

0/t = v-u

0= v-u

U=v

Thus ….we PROVED that 1st law can be derived from 2nd law of Newton

The DURATION of PERSISTENCE of vision is 1/30 TH part of a SECOND

Hello mate

Here is your answer,

Heat does not rise. Heat goes to cold. Hot AIR rises.This type of heat is called radiant heat, which is the process in which energy is emitted, as PARTICLES or waves, by one BODY and transmitted through an intervening medium or space, then ABSORBED by another body.

The PART of YHE MIRROR is FOCUS.....

HIII

ICHTHYOPHOBIA :-------

IT IS THE FEAR FROM TOUCHING,EATING FISH.


HOPE THIS HELPS YOU
PLEASE MARK AS BRAINLIEST

The WAVELENGTH of the MATTER WAVE is INDEPENDENT of (C) momentum.

Thanks...!

No it is not NECESSARY. because ENERGY of some PHOTONS are LOW that they cannot eject electron

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Let t be the final TEMPERATURE.

➧ Then HEAT Liberated by water
➾ m X c x Δt           

➾ [200 x 10-3  x 4.2 x 103 x (50 – t)]

➾ (42,000 – 840t) 


➧ Heat absorbed by ice to change into water at 0oC
➾ 40 x 10 x 336 x 103 
➾ 13,440 J.


➧ Heat absorbed by water to change its temperature from 0oC to toC
➾ (40 x 10-3 x 4.2x 103 x t)
➾ 168t

➧ Total heat absorbed by water
➾ (13,440 + 168t) J

➧ According to the principle of calorimetry,

➧ Heat given = Heat taken

♦ 42000 – 840t
➾ 13440 + 168t

♦ 42000 – 13440
➾ 168t + 840t

♦ 1008t = 28560

t = 28560 / 1008
➾ 28.33oC ...✔

__________
Thanks...✊

Because it CONTAINS more DISSOLVED SALT