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That BOY is MAD . of he had to do EXERCISE then he should TAKE CYLE

The INDEX of REFRACTION of WATER is about 1.33 , so the SPEED of LIGHT in water is (c/1.33) = 2.25E8 m/s.

The fractional error is the value of the error divided by the value of the quantity: X / X. The fractional error MULTIPLIED by 100 is the percentage error. Everything is this SECTION ASSUMES that the error is "small" compared to the value itself, i.e. that the fractional error is much less than one.

72km/hr= 20m/s
v=u+at
=20+2×2
=24

By PYTHAGORAS FORMULA, displacement=√(10^2+10^2)=10√2

Electrical Power (PP) as we know is the product of voltage and current (VIVI).

But is it the product of instantaneous voltage and current or average voltage and current or to make it even worse is it the product of RMS voltage and current.

Lets get to the basic definitions of Power.

Instantaneous Power (PiPi) = Vi∗IiVi∗Ii ;

This information is very fundamental,because the concept of Average and RMS is derived from this basic idea by us to explain certain behavior that happen in electric circuits. The very interesting part here is, the devices that we work with (be it a resistor, or a battery) doesn't know what is the average or RMS values it carry. In very strict sense we could say that the circuit elements only responds to instantaneous values of voltage and current, but on the whole the system (or that element in particular) may exhibit certain behavior, that could only be explained using mathematical tools like average and RMS.

Average Power

Lets start to analyse it,by taking the definition of Average Power(PAPA)

The concept of Average power is observed almost everywhere in Electrical Engineering;The applications of P_avg are MANY, to list a few includes:

Energy meter reading (Energy is an integration function of PaPa)Regenerative breaking (as in line com-mutated Inverter, the DIRECTION of power flow depends of the sign of PaPa)Direction of flow of power in Electrical Power system and Load-frequency control.Heating of LoadsCharging of Battery

To be frank this is the most important (may be only) Power we deal with.

P_avg = {Integral over 0 to T of (P_inst)} / T (Sorry about the Math expression!)

Lets take 3 cases to explain this concept

Case 1: AC Supply - where both V_inst and I_inst are assumed to be pure sinusoidal, with phase shifts corresponding to the type of load it is connected to (Lead or Lag) (Note only RMS values exists here and Avg values are zero)

Here after performing the mathematical derivations(as per definitions of P_a)

Pa=VR∗IR∗Cos(phi)Pa=VR∗IR∗Cos(phi)

where phi is the angle between V_inst and I_inst, VRVR and IRIR are the RMS values of V and I respectively.

Case 2: An Output from a Single Phase Diode rectifier circuit - where there exists both Average and RMS values of V and I

Here let me take 2 examples of power consumption,

Heating of Resistor loadCharging of a Cell

What’s interesting here, is the expression for PaPa takes different forms for both examples.

In a resistor, Power is consumed as heat(this is the physical behavior we observe).

Here Pa=VR∗IRPa=VR∗IR (remember UPF Load!).

why RMS values,recalls us to the definition of RMS Current (it is that value of of a waveform that produces the same amount of heating in a resistor as done by a DC current of same magnitude for the same amount of time)

In a Cell, Power is consumed in chargingthe cell (this is the physical behavior we observe)

This is where the definition of Average current comes to help (it is that value of a waveform that produces the same amount of charge as that of a DC current of same magnitude for a specified time)

So Pa=Va∗IaPa=Va∗Ia

Case 3: DC - where RMS values = Avg Values = DC Steady State Values

Here Pa=Va∗IaPa=Va∗Ia (Also called DC Power)

Now that’s the expression of P_avg, a physical behavior we observe in electrical circuits.P_avg is also referred as Real Power or Active Power.

That’s all about of Average Power in a nut shell.

RMS power is only having a mathematical expression which is the Root Mean Square of Pi(=Vi∗Ii)Pi(=Vi∗Ii),and has no physical significance (as far as I know!)

And AC Power in general refers to Complex Power VI(∗)VI(∗) [V X I’s Conjugate], which is a general expression that includes both Average (or Active) and REACTIVE Power.

As Real {Complex Power} = P_a; and Im {Complex power} = Reactive Power.

I hope this answer can give you an overview of Electrical Power in general.

Because it has low CAPACITY to detect TEMPERATURE and can't GIVE the exact value of body temperature that's why laboratory thermometer is not USED in measuring body temperature of HUMANS

You can USE ELECTRIC CIRCUIT WORKING

When you throw a STONE vertically upward your INITIAL velocity is zero and both the distance and displacement are equal but when the stone comes down its FINAL velocity will also be zero because the distance the ball had travelled is equal to the displacement of that stone that's why the final velocity will ALWAYS remains zero .

Constructors INITIALIZE values to object members after storage is allocated to the object. class A { into X; public: A(); //CONSTRUCTOR }; While DEFINING a constructor you must remember that the name of constructor will be same as the name of the class, and constructors NEVER have return type.

Becomes of high speed of his hand ... when his hand COME near the piles the momentum of his hand becomes zero and KARATE player is able to break the PILE.

The VALUE of G on MARS is 3.8m/ s^2
plz MARK as BRAINLIEST

HOLA CHICO

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The current is said to be ONE AMPERE if one COULOMB of CHARGE flows through the circuit one second

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HOPE U UNDERSTAND ☺☺☺

FORCE = mass × Acceleration

Acceleration = CHANGE in speed ÷ change in time

Change in speed is : 2.6 - 15 = - 12.4m/s

t = 0.15

a = 12.4/0.15 = - 82.67m/s²

The negative sign indicates that car DECELERATES.

F = 1500 × 82.67 = 24005 N

When a BODY HITS ANOTHER body with HIGH speed the other body exrts the same force. so if the speed is higher larger force is exerted by the body. hence the accident is worse than low speed.

1. Inertia
2. MOMENTUM or QUALITATIVE DEFINITION of force.
3. every action has an equal and opposit reaction

The measure of a fluid's resistance to FLOW is called viscosity. THEVISCOSITY index is a measure of CHANGE inviscosity with fluctuations in temperature.

ANSWER:No, it doesn't move in constant speed

Explanation: the object can move in straight LINE, as it is possible on plane surface but it will change speed as it will slow down DUE to FRICTIONAL force. It is only possible if the net force is zero.

When Force of 130N is applied the KINETIC friction acts in opposite SIDE of the applied force.

So object will EXPERIENCE the resultant force of these.

So resultant force is mass TIMES acceleration=10x10=100.

130 - kinetic friction=100
=>kinetic friction=30N

36.The periodic table which is based on classification of element on the BASIS of electronic configuration is called MODERN periodic table.

On the basis of electronic configuration, the elements are classified into four blocks:

s- BLOCK elements- divided into TWO groups

p- block element- divided into six groups

d- block element- divided into ten groups

f- block element- divided into two series called lanthanide and actinides.

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The rate of CHANGE of DISPLACEMENT with TIME is called velocity.

Because ARCHER can't shoot insalid and in LIQUID arrow will not move in SPED

Hey Guys,

TWO main types of LUBRICANTS :- 1) WOOL GREASE , 2) Whale Oil .


Thanks.

Mass is the QUANTITY of matter present in OBJECT
SI unit is kg kilogram
weight is the FORCE of attraction b/w earth and object SI unit is N newton

T= 2π√l/g

T^2= 4 π2 l/g
T^2=L/ LT^-2
T^2= T^2
T = T

Diffusion is the movement of molecules from a region of high concentration to a region of low concentration.

The following factors affect diffusion.

1.) Temperature — High TEMPERATURES increase the KINETIC energy of the diffusing molecules hence the diffusion rate increases.

2.) The DENSITY of the molecules — High density increase collision rate hence the rate of diffusion.

3.) The medium of diffusion — A medium with larger molecules will REDUCE collision rate and hence there will be a lower diffusion rate.

4.) Concentration gradient — The HIGHER the concentration gradient, the higher the diffusion rate.

Here_Is_Your_Answer.
Plz_Mark_It_As_Brainliest_Answer.
And_Drop_A_♥.

So that it does not BLAST as it can blast on OVERHEATING

Rule of REFRACTION of LIGHT
1. Incident ray, refracted ray nd normal at the point of INCIDENCE, all lie in same plane.
2. The ratio of sin of incidence angle nd sine of refraction angle is constant for any two medium nd same colour of light. This is also called snell's law.

Sin i / sin r = constant

i is incidece angle nd r is refraction angle. This constant is called refractive index of second medium with respect to first medium.

I hope it helps you

This MEANS |a+b|=|a-b| means if we SQUARE both SIDE THEB a2+b2+2abcostheta =a2+b2-2abcotheta or 4abcostheta=0 or costheta=0or theta=90 DEGREE

DENSITY of cotton is less than that of WOOD. So, 1 kg of cotton will occupy more space than 1 kg wood , and hence displace more VOLUME of AIR.

The woman with flat shoes will feel more comfortable while walking on a SANDY beach...

REASON

the reason is simply pressure as given in above diagram.......high HEELS have LESS area in contact with the sandy ground therefore they will exert more force and will sink more into sand whereas sandals have more area in contact with the ground hence less force and they will leave very little impact on sand......

hope it HELPS U........

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