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speed of the MAN, u = 4 km/hr = 10/9 m/s

speed of the train, v = 55/9 m/s

length of the train, b = X metre

length of the man, a = 0 metres

time TAKEN by the train to CROSS the man = (a+b)/(u-v) seconds

therefore,  (0+x)/[(10/9)+(55/9)] = 30

x/(45/9)= 30

x/5 = 30

x = 150

therefore the length of the train = 150 metres

The general expression forgravitational potential energy arises from the law of GRAVITY and is equal to the work done against gravity to bring a mass to a given POINT in SPACE. ... This is the form for thegravitational potential energy which is most USEFUL for CALCULATING the escape velocity from the earth'sgravity.

3600000J is UR ANSWER ..PLEASE mark THIA as brainliest

In ISOTHERMAL PROCESS,, change in temperature is zero. i.e. zero workdone

so to that we use first formula for answer INSTEAD of zero

By saying that when we do a work on any BODY some energy is used if R not gong to SAY its energy stored in the form of mgh than its gona disturb the conservation of energy and it is a consertive FORCE dependent like
ex. depend on initial and final point not depend on how u have tken a block up/down
-mgh/+mgh deponds on ur choice of axis

If light and heavy body have equal momentam then lighter body will have higher KINETIC ENERGY, since it's velocity have to make up for its lighter MASS.

Let , mass of lighter body = m , and velocity = v

Mass of heavy body = M, and velocity = V

Now since momentam is equal so ,

MV = mv

=> v = MV/m ( since M>m , so v > V)

Now KE(L) of lighter body = 1/2 m v^2 = 1/2 m ( MV/m) ^2

KE(H) of heavy mass = 1/2 MV^2

So KE (L) > KE(H)

As element GET hotter they have a HIGHER likelihood of their electrons being ABLE to escape. Due to increase intensity of the individual atom’s jiggling, called heat. Each element’s atomic configuration determines how MUCH jiggling (heat) is required to throw off the electrons that you see as light. The UNIQUE assembly of the element’s protons, neutrons, and electrons describe the characteristics of its behavior.

.....................................

Potential difference between M and N is 6 volts

Explanation:-
V =?
I = 1A

R = R1+R2+R3+R4
= 1+2+2+1
= 6 ohm
The equivalent resistance is 6 then,

V = IR
= 1A x 6 ohm
6 V

Hope it HELPS

WELL no.. Since he has SUPERNATURAL POWERS so he can lift ANYTHING

The Hamiltonian of a charged particle in a magnetic field is,



Here A is the vector potential. When a magnetic field is present, the kinetic momentum mv is no longer the conjugate variable to position. The conjugate variable to position is p = mv + qA. In this section, this Hamiltonian will be derived STARTING from Newton's law.

The force on a charged particle is,



The force is a function of both the position and the velocity of the particle. To describe the motion of the charged particle quantum mechanically, one needs to construct the Hamiltonian. However, to find the conjugate variable the Lagrangian needs to be constructed first. The force is related to the Lagrangian by the Euler-Lagrange equation,



When the Lagrangian is substituted into the Euler-Lagrange equation, the result is Newton's law for the force in question. The Lagrangian is constructed from the force 'by INSPECTION'. This means that we guess a Lagrangian and substitute it into the Euler-Lagrange equation. If the trial Lagrangian produces the correct form for Newton's law, that that is the Lagrangian we are seeking.

We assert that the APPROPRIATE Lagrangian is,



By substituting this Lagrangian into the Euler-Lagrange equations, we will show that it describes the motion of a particle of mass m and charge q in the presence of electric and magnetic fields described by the scalar potential V and vector potential A.

The Euler-Lagrange equation corresponding to the x coordinate is,



Here



and



Combing these results yields,



This is the x component of Newton's law,



where,



The y and Z components of Newton's law can similarly be determined from the Euler-Lagrange equations.

By definition, the conjugate variable to the position x is,



The mvx component of the conjugate variable is called the kinetic momentum and the qAx component of the conjugate is called the field momentum. The notation can be confusing here. The variable px is the conjugate variable to the x-coordinate, not the kinetic momentum.

A Legendre transformation is used to obtain the Hamiltonian from the Lagrangian,



Using the EXPRESSION for the Lagrangian from above,







Thus the Hamiltonian for a charged particle in an electric and magnetic field is,



The quantity p is the conjugate variable to position. It includes a kinetic momentum term and a field momentum term. So far, this derivation has been entirely classical. (Hamilton died long before anyone thought about quantum mechanics.) To make the transition to quantum mechanics we replace p by . The Schrödinger equation for a charged particle in a magnetic field is,



One PLATE of the capacitor holds a positive charge Q, while the other holds a negative charge -Q. The charge Q on the plates is PROPORTIONAL to THEPOTENTIAL difference V ACROSS the twoplates. The capacitance C is the proportional constant, Q = CV, C = Q/V. ... The SI unit of capacitance is Coulomb/Volt = Farad (F).

Answer:

The formula for aluminum oxide is Al2O3.

Explanation:

The correct answer is Al2O3.

Let US see how we got the answer; Look at the electronic arrangement of AL and O ATOMS.

Al ( Z= 13) has 13 electrons with following electronic configuration. 1s22s22p63s23p1

It loses three electron in its 3s and 3p subshell to achieve stability and forms ION Al3+.

Al3+ = 1s22s22p6

O ( Z=8) on the other hand has eight electrons and wants to gain two electrons to achieve stable noble gas configuration.Oxygen atom on gaining two electrons forms negative oxide ion, O2− ion.

O ( Z=7) = 1s22s22p4

O2− = 1s22s22p6

Three Oxygen atoms gains two electrons each ( total of six) from two Al atoms, each Al atom loses three electrons (total of six) to three oxygen atom , in this PROCESS each Al atom becomes Al3+ ion and Oxygen atom after gaining two electrons becomes O2− ion.

Because they all have there own SPECIFIC WORK .not only a SINGLE ORGANELLES do all work

if i convert 42 km/h to m/s it will 11.66m/s

and FULL detance will 3500 m

so if u have to reach that destance by 8km/h it will take 26.28 hour.

so it will able to SAVE

21.28 HOURS AVERAGE

A SIMPLE pendulum have max KE & least or 0 PE at its MEAN position,as at that point velocity is maximum . PLEASE mark as brainliest and FOLLOW me

In physics, resonance is a phenomenon in which a VIBRATING system or external force drives another system to oscillate with GREATER amplitude at a limited range of frequencies.


example is like

best models of resonance in a musical instrument is a resonance tube (a hollow cylindrical tube) partially filled with water and forced into VIBRATION by a tuning fork. The tuning fork is the OBJECT that forced the air inside of the resonance tube into resonance. As the tines of the tuning fork vibrate at their own natural frequency, they created sound waves that impinge upon the opening of the resonance tube. These impinging sound waves produced by the tuning fork force air inside of the resonance tube to vibrate at the same frequency. Yet, in the absence of resonance, the sound of these vibrations is not loud enough to discern. Resonance only occurs when the first object is vibrating at the natural frequency of the second object. So if the frequency at which the tuning fork vibrates is not identical to one of the natural frequencies of the air column inside the resonance tube, resonance will not occur and the two objects will not sound out together with a loud sound. But the location of the water level can be altered by raising and LOWERING a reservoir of water, thus decreasing or increasing the length of the air column.

The distance of the FOCUS F of from pole P of mirror is called FOCAL LENGTH that is focal length f=PF

The magnetic field does no work, so the kinetic energy and speed of a charged particle in a magnetic fieldremain CONSTANT. The magnetic force, ACTING PERPENDICULAR to the velocity of the particle, will cause CIRCULAR motion.

Motion of a Charged Particle in a Magnetic 

V = 5m/s

h = 100m

t = ?

t =√(2h/g)

t = √(2×100/10)

t = √20

t = 2√5

t = 4.47

chromium plating often referred to simply as chrome, is a technique of electroplating a thin layer of chromium onto a metal object. The chromed layer can be decorative, PROVIDE corrosionresistance, EASE CLEANING procedures, or increase surface hardness. Sometimes, a less EXPENSIVE imitator of chrome may be used for aesthetic purposes.

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▶️

❣️Hope it HELPS ❣️

Thats the answer in the pic HOPE U all will
UNDERSTAND it. pls mark me as a BRAINLIST

A=v-u/t
=8-2/10
=6/10
a= .6ms-2
i HOPE it HELPS you ....PLEASE MARK as BRAINLIST

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♦️Heya friend♦️
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The heart is a muscular ORGAN that pumps blood continuously throughout the body. It is comprised of four chambers — the right and left atrium and the right and left ventricle.

The chambers of the heart work together by alternately contracting and relaxing to pump blood throughout the heart. To accomplish this, the heart uses an ELECTRICAL system to trigger a HEARTBEAT. Essentially, the electrical system is the power SOURCE that makes all the heart's functions possible.
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Blood vessels lead in and out of the chambers, which receive and distribute blood throughout the body. The four chambers are connected by four valves — the tricuspid, pulmonic, mitral and aortic valves. These valves work like one-way doors, allowing blood to flow in only one direction.
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The world depends on a great deal of its energy in the FORM of fossil fuels. Examples of fuels include gasoline, coal and alcohol. Most of the fuels come from non-renewable sources; once used, they are gone forever. Each day, people bathe, COOK, clean, do LAUNDRY and drive using various types of fuels. A quick review of DIFFERENT fuels reveals the important roles they play in daily life.

HOPE HELPFULLY

ANSWER:

VOLUME of WATER is more

1000 joules especially as a MEASURE of the energyvalue of foods is CALLED KILO JOULE

Every1 has a DIFFERENT ANS for this

I not UNDERSTAND the QUESTION

HEY MATE!

WE CAN NOT SEE A SUBATOMIC PARTICLE LIKE ELECTRON AS THEY ARE MUCH SMALLER THAN THE ATOM.

It's their PSYCHOLOGY

The gradient of a distance-time GRAPH REPRESENTS the speed of an object. The VELOCITY of an object is its speed in a particular DIRECTION. The slope on a velocity-time graph represents the ACCELERATION of an object. The distance travelled is equal to the area under a velocity-time graph.

Angular momentum



In PHYSICS, angular momentum is the rotational equivalent of LINEAR momentum. It is an IMPORTANT quantity in physics because it is a conserved quantity—the TOTAL angular momentum of a system remains constant unless acted on by an external torque.

May or may be not.
When size of BODY is very small compared to the size of earth then centreof mass and CENTRE of GRAVITY are same point or coincide.
But when the size of objects is COMPARABLE to size of earth then centre of mass and centre of gravity may not coincide

I don't THINK so



is there any GOD

Is there any GOD


what do you THINK

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➡ reflective INDEX of MEDIUM is DEFINED as the ratio of the speed of light in vaccum to the speed of light in that medium

➡ N = c/v

since c can never be less than v, hence,n can never be less than 1

✨ HOPE IT HELPS U ✨

# ⭐⭐ RAJPUTANA⭐⭐

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1Contour lines must CLOSE, not necessarily in the LIMITS of the plan.

2The horizontal distance between any TWO contour lines indicates the amount of SLOPE and varies inversely on the amount of slope.

3Widely spaced contour indicates flat surface.

4Closely spaced contour indicates steep slope ground

5 Equally spaced contour indicates uniform slope

6Irregular contours indicate UNEVEN surface.

Errors In Chain SURVEYING. Chain survey is the simplest method of surveying. It is the exercise of PHYSICALLY MEASURING horizontal distances. In this method the lengths of lines marked on the field are measured, while the details are measured by OFFSETS and ties from these lines.

A CONCAVE mirror.
A WHITE screen.
A DISTANT object.
A METER SCALE.