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The STUDY of and KNOWLEDGE about the PHYSICAL world and NATURAL laws that CALLED s

Science.

Answer:

AMERICAN astronomer Edwin Hubble and others discovered in the 1920s that the Universe is expanding by showing that most galaxies are RECEDING from the Milky Way — and the farther away they are, the faster they are receding. The ROUGHLY CONSTANT ratio between SPEED and distance became known as the Hubble constant.

Answer:

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Explanation:

In the early and mid-1800s, how did the ECONOMIES of the NORTHERN and Southern states COMPARE?

Both the North and the South had highly agricultural economies.

Both the North and the South had highly agricultural economies.

The North was industrialized, while the South was more agricultural.

The North was industrialized, while the South was more agricultural.

Both the North and the South had highly industrialized economies

ANSWER:

I don't KNOW the answer

Answer:

• The Schwarzschild radius is a physical parameter that shows up in the Schwarzschild solution to Einstein's FIELD equations, corresponding to the radius defining the event horizon of a Schwarzschild black hole. It is a characteristic radius associated with every quantity of mass.
• Telepathy is the purported vicarious transmission of information from one person to another without using any known human sensory channels or physical interaction.
• Time travel is the concept of movement between certain points in time, analogous to movement between different points in space by an object or a person, typically with the use of a hypothetical device known as a time machine.
• A black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of GENERAL relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole.
• A wormhole is a speculative structure linking disparate points in spacetime, and is based on a special solution of the Einstein field equations. A wormhole can be visualized as a tunnel with two ends at separate points in spacetime.
• Octopuses are cephalopods, invertebrates that also INCLUDE SQUID and cuttlefish. They have bulbous heads, large eyes, and eight very useful arms.

EXPLANATION:

A scalar quantity is defined as the PHYSICAL quantity that has only magnitude, for example, mass and ELECTRIC charge. On the other hand, a vector quantity is defined as the physical quantity that has both magnitude as WELL as direction like force and WEIGHT.

Answer:

WEAK interaction,

also called weak FORCE or weak nuclear force, a fundamental force of NATURE that underlies some forms of radioactivity, governs the decay of unstable subatomic particles such as mesons, and initiates the nuclear fusion reaction that FUELS the Sun

Explanation:

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EXPLANATION:

focal length= 1/ power of lens

so F= 1/1.50

= 0.66m

it is CONVEX lens

because of its POSITIVE sign

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EXPLANATION:

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Answer:

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ANSWER:

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ANSWER:

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ANSWER:

The MEAN free path is the distance that a molecule travels between collisions. ... The criterion is: λ (N/V) π r2 ≈ 1, where R is the RADIUS of a molecule.

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ANSWER:

fgahakmavacevhakmbvagaffafstsgvwuhq FLAWLESSLY BEAUTIFUL beautiful GIRL in a LITTLE little while I

ANSWER:

V=emf/r+R

=2/0.1+0.9

=2/1

=2V

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ANSWER:

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ANSWER:

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Explanation:

cjqvdk ltvglrfblrblrblxbrx goyroydoysoydotsoysotsoysotdoydoydoysousoudoysoydpudludlydluflufpiSquare ROOT of 6.76 is ………………..fulfufludlydoydoydoydpydpukyurpudoydpudpudpudououdpudpur,pudpudpuf

Answer:

the blue COLOUR SOLUTION is COPPER SULPHATE solution or CuSO4

ANSWER:

can't UNDERSTAND why

can't understand why

Answer:

Light is a form of electromagnetic radiation with a WAVELENGTH which can be detected by the human EYE. It is a small part of the electromagnetic spectrum and radiation given off by stars like the sun. ... Light EXISTS in tiny energy PACKETS CALLED photons. Each wave has a wavelength or frequency.

Explanation:

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ASSUME that the core is of infinite permeability ( m -> ¥) and neglect the effects of FRINGING fields at the AIR gap and leakage flux. ( a) Calculate the reluctance of the core. ...

Eg .No.2. Consider the magnetic circuit of with the dimensions of PROBLEM 1.1.

EXPLANATION:

DEGREE Celsius is a UNIT of measurement of tomperature

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ANSWER:

ANSWER:

GALVANOMETER has FIXED RESISTANCE

ANSWER:

A thermodynamic system is a BODY of matter and/or radiation, confined in space by walls, with defined permeabilities, which SEPARATE it from its surroundings. The surroundings may include other thermodynamic systems, or PHYSICAL systems that are not thermodynamic systems.

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Answer:

There are several types of thermodynamic PROCESSES, including (a) isothermal, where the system's temperature is constant; (B) adiabatic, where no heat is EXCHANGED by the system; (c) isobaric, where the system's pressure is constant; and (d) isochoric, where the system's volume is constant.

Classical thermodynamics considers three main kinds of thermodynamic process: changes in a system, cycles in a system, and flow processes. A CHANGE in a system is defined by a passage from an initial to a final state of thermodynamic equilibrium.

ANSWER:

The constant

of oxygen as WELL as for HYDROGEN is 1.40. If the speed of SOUND in oxygen is hydrogen

★ Concept :-

Here the concept of Percentage increase in electric resistance has been used. We see that we are given a wire which is stretched. This means the volume of the wire won't be changing. From here we can take a relationship between the length, area and volume of wire. Then we can apply it in the formula of the ELECTRICAL RESISTIVITY and from there we can find the initial resistance. Then we can compute the change in Resistance by taking logarithm and find the answer.

Let's do it !!

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★ Formula Used :-

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★ Solution :-

Given,

» Resistivity of the material = ρ

This will be same for both cases even when the area of cross section has been increased.

» Initial length of the wire = l

» Initial area of cross section of the wire = A

» Diamter of the wire = d

» RADIUS of the wire = r = ½ × d

» Volume of the wire = V

» Length = l = V/A (since volume remains same on stretching)

Then,

» Area of cross-section = πr² = π × ¼ × r²

• Let the Intial Resistance of wire be R.

By applying values here, we get

Now here we see that the change is small or LARGE, we shall apply differentiation and logarithm first.

• ∆R is the change in electrical resistance.

• ∆D is the change in cross sectional area

From this we get,

• Here the factor is achieved from logarithmic function.

Multiplying both sides by 100, we get

This will give ∆R % that is percentage increase in electrical resistance . Now applying the value, we get

(since we don't INCLUDE -ve sign in calculation of percentage)

This is the required answer.

_______________________________

★ More to know :-

where,

• ϵ｡ is the permittivity of free space.

• q and it's denotions are two charges.

• r is the distance between two charges.

• F is the force between two charges. This can be either attractive or repulsive on the basis of charges.

Friction is a force that resists the RELATIVE motion between two OBJECTS or MATERIALS. The CAUSES of the resistive force of friction are: Molecular Adhesion. Surface Roughness.

ANSWER:

It is the UNBALANCED FORCE ACTING on an OBJECT...

Answer:

A TERMINAL is the POINT at which a conductor from a component, device or network COMES to an end. Terminal may also refer to an electrical connector at this endpoint, ACTING as the reusable interface to a conductor and creating a point where external CIRCUITS can be connected

Answer:

The reaction between the ACID and BASE is NEUTRALIZATION reaction.

Acid+Base-> salt+water

example:

HCl+NaOH->NaCl+H2O

Explanation:

The force is directly proportional to the product of their masses and inversely proportional to the SQUARE of the DISTANCE between them. In equation FORM, this is F=GmMr2 F = G mM r 2 , where F is the magnitude of the gravitational force. G is the gravitational constant, given by G = 6.673 × 10−11 N·m2/kg2.

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Law of conservation of energy states that the energy of a system is always constant. In other WORDS, we can say that energy can neither be created nor destroyed. ... Mechanical energy (E) is the sum of the potential energy (U) and the kinetic energy (K) of the FREELY FALLING body. Therefore, E=K+U=constant.

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ANSWER:

where is the GIVEN table BRO

ANSWER:

WEIGHT = 40kgf or 400N

Explanation:

W = mg

W = 40KG * f

W =40kgf

Or we can substitute G= 10ms^-2

W = mg

W = 40kg * 10ms^-2

W = 400N

Methane hydrate is often CALLED “fiery ice.” Methane hydrate looks LIKE an ice, and starts BURNING when an open flame is brought close to it; hence the name. Only water is left after COMBUSTION. It is a STRANGE substance.

GiveN :-

• To draw the V - I graph of Ohmic conductor .

SolutioN :-

We need to draw the V-I graph for an Ohmic conductor . As we know that According to Ohm's Law under same teemerature and other conditions , Potential difference applied across the end of the conductor is directly proportional to the CURRENT flowing through it . That is ,

This implies when we increase the potential difference the current flowing also INCREASES. The constant here is R which is the resistance . That is ,

This implies that Current is directly proportional to the Voltage . Hence the graph is a straight line passing through the origin O , as the graph SHOWN below or may refer to attachment .

G R A P H :-

Also note that the ratio of V:I remains constant which is the resistance of the conductor . That is ,

Answer:

In a book called On the REVOLUTIONS of the HEAVENLY Bodies (that was PUBLISHED as Copernicus lay on his deathbed), Copernicus proposed that the Sun, not the EARTH, was the center of the SOLAR System. Such a model is called a heliocentric system.

Explanation:

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Newton's LAW are very IMPORTANT because they tie into almost everything we see in everyday life. ... Newton's LAWS speak very generally all forces, but to use them for any specific PROBLEM, you have to actually know all the forces involved, like gravity, friction, and TENSION.

Answer:

What is the equation of continuity? Liquids must maintain their volume as they flow in a pipe since they are nearly incompressible. This MEANS that the volume of LIQUID that flows into a pipe in a given amount of TIME must equal the volume of liquid that flows out of a pipe in the same amount of time.

Explanation:

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Motors convert electric energy to MECHANICAL WORK. The OPPOSITE is done by generators that convert mechanical work to electrical energy.

EXPLANATION:

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Explanation:

50 km/hr (31 MPH) DESCRIBES the speed at which a car is traveling ALONG a road, while 50 km/hr west describes the velocity at which it is traveling.

ANSWER:

STEP by step EXPLANATION:

Answer:

Humans can detect sounds in a frequency RANGE from about 20 Hz to 20 kHz. (Human INFANTS can actually hear FREQUENCIES slightly higher than 20 kHz, but LOSE some high-frequency sensitivity as they mature; the upper LIMIT in average adults is often closer to 15–17 kHz.)

Explanation:

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ANSWER:

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Answer:

7.5 m/s is the AVERAGE SPEED of OBJECT