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ANSWER:

No.....................

ANSWER:

The OBJECT should be placed

Between POLE and FOCUS...

Answer:

EXPLANATION:

STANDARD sea-level pressure, by definition, equals 760 mm (29.92 inches) of MERCURY, 14.70 pounds per square inch, 1,013.25 × 103 dynes per square CENTIMETRE, 1,013.25 millibars, ONE standard atmosphere, or 101.325 kilopascals.

Answer:

Answers : (1)

Acc to ques, 2 seconds before it reaches the maximum height it makes an angle of 53 deg

=> Initial velocity of y-component will be (Uy)=Usin53

=> Initial velocity of x-component will be (Ux)=Ucos53

Therefore, Vy=Uy-gt

=>0=Usin53-20

=>U=25m/s

Now, At highest point the y-component velocity is 0, only x-comp velocity exists which remians constant throughout the projectile motion.

Hence, At highest point the OVERALL velocity of STONE will be equal to the x-component velocity

ie, Ucos53=25x3/5=15m/s ANSWER

Answer:

150° with the 1ST vector

Explanation:

the resultant of three VECTORS 1,2 and 3 units whose directions are those of the sides of an equilateral triangle at an angle of is(a) 30 with the 1st vector (b) 15 with the 1st vector (c) 100 with the 1st vector (d) 150 with the 1st vector

Taking AB as base of the triangle and draw the two sides each making an angle of 60 degree with AB at A and B respectively meeting at the point C. Assume vectors or forces of magnitude 1 ,2 and 3 act respectively along the side AB,  BC and CA.

Here THIRD vector is CA  not AC

AB = 1 i  ( along with x axis)

BC = -2Cos60°i + 2Sin60°j  = - 1 i  + √3 j

we extend CA further from point A

CA = - 3Cos60° - 3Sin60°j  = -3/2 i - 3√3 /2 j

Net resultant AB + BC + CA  = 1 i - 1 i  -3/2 i  + √3 j - 3√3 /2 j

= -3/2 i - √3/2 j

Magnitude =  √ (-3/2)² + (-√3/2)²  =  √ (9/4 + 3/4) = √3

Both are - ve so third quadrant

Cosθ = -3/2/ √3 = -√3/2  =>  θ = 210°  ( in 3rd Quadrant)

Angle between AB & Resultant = 360 - 210  = 150°

150° with the 1st vector

ANSWER:

Effects of Earth's magnetic field variation on high frequency wave propagation in the ionosphere. The ionosphere is an ANISOTROPIC, dispersive medium for the propagation of RADIO frequency ELECTROMAGNETIC WAVES due to the presence of the Earth's intrinsic magnetic field and free charges.

I hope my answer helps you.

Explanation:

Jap of or or only so rec in in the AFTERNOON to on all of so it should to in on em an in onbt am do am TRYING in on em em an to in on em all well to do so so do so do so do so to do GO ask so to the is an so to on all about since it's in in on the sch CUBE is do go to in such yes ex exam EVERY ten effect you in to guol

Answer:

Human Eye and Colourful World

The FAR point of a MYOPIC person is 80 cm in FRONT of the eye. What is the nature and POWER of the lens required to correct the PROBLEM? ... This defect can be corrected by using a convex lens of approperiate power.

Explanation:

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EXPLANATION:

This are SOURCE of ENERGY .

ANSWER:

i=p/v=360/220=1.63A and

R=v/I=220/1.63 =134.96

second CASE

i =p/v=840/220=3.81A

R=v/I =220/3.81=57.74ohn

Physics is a branch of SCIENCE that studies MATTER in motion and BEHAVIOUR through SPACE and TIME..

Answer:

45kmph

Explanation:

(54kmph+36kmph)/2

Answer:

Explanation:

VELOCITY= 

DISPLACEMENT(or)Distance= 5km = 5000 m

Time= 20MIN = 0.333 hr = 20×60=1200 sec

A )     velocity(km/min)=5km/ 20min =0.25 km/min

B )    velocity(m/s)= 5000m/1200s =4.1667 m/s

C )    velocity(m/min)= 5000 m/ 20 min = 250m/min

D )   velocity(km/hr)= 5km/0.333 hr =15 km/hr

dmore

Explanation:

if the velocity of an object UNDERGOES equal changes in equal interval of time then its ACCELERATION is said to be uniform.

acceleration of body moving with uniform velocity is ZERO.

Amplitude and frequency modulation are the two techniques used to modulate a signal in order to have LONG distance as well as PROPER transmission. The MAJOR DIFFERENCE between amplitude modulation and frequency modulation lies in the method of modulating the signal. In amplitude modulation, variation in amplitude of CARRIER signal according to the message signal is noticed. However, in frequency modulation, the frequency of the carrier signal is changed according to the message signal.

In amplitude modulation, simply the amplitude of the carrier is modulated thus its frequency and phase shows no change. Whereas, in frequency modulation, only the frequency of the carrier is modulated hence here amplitude and phase act as constant factors.

ANSWER:

Potential difference V = 125 - 25 = 100V

W= ?

q = 1mC

V= W/q

W = V×q

W = 100×1×10^-6

W= 10^-4J

ANSWER:

VELOCITY, ACCELERATION, DIPLACEMENT , FORCE.

ANSWER:

An isobaric expansion of a gas REQUIRES heat transfer to keep the pressure constant. An isochoric process is one in which the VOLUME is held constant, meaning that the WORK done by the system will be zero. The only change will be that a gas gains internal ENERGY.

ANSWER:

The larger surface area of their ears helps to keep African elephants cool in the blazing African sun. Asian elephants have LESS to worry about heat-wise, as they TEND to live in cool JUNGLE areas, so their ears are SMALLER. ... The African Elephant (Loxodonta africana) lives in some 37 countries in sub-Saharan Africa.

ANSWER:

MICHEAL Faraday ,THOMAS DAVENPORT , WILLIAM

it will FLOAT...... HOPE you LIKE it MATE

Answer:

75 MILLILITRES .........

Explanation:

NPN Transistor

Definition: The transistor in which one p-type material is placed between two n-type materials is known as NPN transistor. The NPN transistor amplifies the weak signal enter into the BASE and PRODUCES strong amplify signals at the collector end. In NPN transistor, the direction of MOVEMENT of an electron is from the emitter to collector region due to which the current CONSTITUTES in the transistor. Such type of transistor is mostly used in the circuit because their majority charge CARRIERS are electrons which have high mobility as compared to holes.

Answer:

80ohm

Explanation:

Because the SIZE is HALF

Answer:

Sheep GET their energy, PROTEIN, VITAMINS and minerals from the pasture or through SUPPLEMENTAL feed. A limited supply of NUTRIENTS in the sheep's diet can lead to: weight loss.

Answer:

Then, divide the sum by two. This will give you the average speed for the ENTIRE trip. So, if BEN traveled 40 MPH for 2 hours, then 60 mph for another 2 hours, his average speed is 50 mph.

ANSWER:

Circuits A and B are different configurations of the same circuit elements. Assume the battery is IDEAL (no internal resistance). Restart. Pick an animation to show the VOLTAGE and current on the meters (voltage is given in volts and current is given in milliamperes).

Use circuits A and B to determine the internal resistance of the ammeter and the voltmeter that are used in both circuits. You can vary the resistor in circuits A and B (and see the resistor value).

Once you determine which circuit you will use to find the resistance of the ammeter, you should keep in mind the ideal resistance of an ammeter (ideally 0 and pick your variable resistance APPROPRIATELY (e.g., if a small resistance is in series with a very large resistor, the voltage drop across the big one will not be measurably different than the voltage drop across both of them, etc.). The same is true for your determination of the resistance of a voltmeter.

Answer:

Yes, SOMETIMES it is CAPABLE, DEPENDING UPON the wavelength and AMPLITUDE

ANSWER:

hopefully it is GOING to HELP u.any doubts ASK me

Answer:

Electromagnetism is a branch of physical science that DESCRIBES the interactions of electricity and magnetism, both as SEPARATE phenomena and as a singular electromagnetic force. Amagnetic field is CREATED by a moving ELECTRIC current and a MAGNETIC field can induce movement of charges (electric current).

ANSWER:

by the HELP of the equivation

speed-- distance/time

Answer:

because maximum wollen clothes are THICK and DARK in COLOUR

Explanation:

as we know that dark colour and thick clothes absorb SUN

Hello dear!

Planets are very close to the earth as compared to the stars.They also ACT as EXTENDED source of light.The total variation in the amount of light entering our EYES from all the INDIVIDUAL point sized sources will average out to ZERO,which nullify the twinkling effect of each other.So, the planets do not twinkle.

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ANSWER:

Atmospheric pressure doesn't just HELP with DRINKING any liquid with a STRAW, it's essential. When you suck on a straw stuck into liquid, it lowers the pressure in the straw. That makes atmospheric pressure higher than the pressure in the straw, which forces the liquid to go up into the straw, and into your MOUTH.

ANSWER:

➡️at CENTRE of curvature

Explanation:

➡️The object should be placed on centre of curvature so that the SIZE of image is equal to the size of the object.

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Req= 10×25/(10+25)

=50/7

Using V=iReq

V=2.1×50/7= 15 volt

Now at 5 ohm

V=iR

i=v/R=15/25=0.6

Current at 5 ohm RESISTANCE is 0.6 ampere

ANSWER:

a) 0.25km/min

b)4.16m/s

c)250m/min

d)15km/h

ANSWER:

At MAXIMUM HEIGHT VELOCITY is 0

WE KNOW THAT,

A=V-U/T

SO,

60-20 /6/60MINS.

40/1/10 MINS.

40*10

400M/S^2

ANSWER:

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Answer:

The examples of CONCAVE mirrors are the mirrors used in automobile head lights, reflecting telescopes, torch lights, etc.

The examples of convex mirrors are the mirrors used as REAR side mirrors of VEHICLES, optical INSTRUMENTS, calling bell, etc.

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Helps you ALOT

Because they are INVERSELY PROPORTIONAL to each other

Answer:

the bransc of MECHANICS CONCERNED with the motion of OBJECTS WITHOUT reference to the force which cause the motion.

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The gold leaf electroscope

Intro⤵

This is an instrument for detecting and MEASURING static ELECTRICITY or voltage. A metal disc is connected to a NARROW metal plate and a THIN piece of gold leaf is fixed to the plate. The whole of this part of the electroscope is insulated from the body of the instrument.

Summery⤵

The gold leaf electroscope has been used by physicists for hundreds of years. It indicates the presence and nature of a charge through the application of charge to a metal top plate connected through a stem to TWO pieces of gold leaf. The movement of one piece of gold leaf away from the other shows that the electroscope is charged.

Hence,⤵

It detect the presence of charge and test the kind of charge.

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ANSWER:

gdjddv HI jdgdhdjdjdldkgsjdhff

ANSWER:

there is no DIFFERENCE what do

Answer:

the

Explanation:

Conductance is the property of an object, WHEREAS conductivity is the property of a material. ... Conductance is a mass dependent property, while conductivity is an INHERENT or intrinsic property and does not depend on mass. Conductance of equal mass will VARY depending upon its shape and SIZE ALSO.

1240 have no UNIT........

Answer:

For minimum resistance , : Parellel

1/5 + 1/ 10 = 1/R

3/10 = 1/R

10 / 3 = R

3.333 = R

Now , for maximum resistance : Series

5 + 10 = R

15 = R

Now TOTAL CURRENT when connected to series,

V = I / R

6 = I / 3.33

6* 10/3 = I

20 Ampere = I

Now, total current when connected in parallel ,

V = I/R

6= I / 15

6*15 = I

90 Ampere = I

Explanation:

Hope It will help u