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ANSWER:

EXPLANATION:

SPEED up STREAM=2.2*150=330min

Speed=distance/time =330/55=6km/hr

Speed downstream=150/55=2.7km/hr.

Speed of stream =6-2.7=3.3km/hr.

ANSWER:

EXPLANATION:i can not UNDERSTAND the QUESTION

Answer:

man rows to a PLACE 48 KM distant and come back in 14 hours. He finds that he can row 4 km with the STREAM in the same time as 3 km against the stream. The rate of the stream is: A. 1 km/hr.

With same VELOCITY

If their heights are same .

It is a very IMP . POINT and just learn it now ...

My HOD physics teacher ALLEN TOLD me this

ANSWER:

I THINK B...........

ANSWER:

Hey dear...

here is your answer..! b

Please REFER to the Attachment..

The converse of the Pythagorean THEOREM is: If the square of the length of the longest side of a triangle is equal to the sum of the squares of the other two sides, then the triangle is a right triangle. That is, in ΔABC, if c2=a2+b2 then ∠C is a right triangle, ΔPQR being the right ANGLE.

Answer: Convex Lens. This is a lens in which both SURFACES are curved so that a beam of LIGHT PASSING through it is brought to a POINT or focus. A convex lens can be used to start a fire by directing the sun's rays to a point (your tinder) so it should only be used on bright, SUNNY days.

║ANSWER║

• The RATE at which something occurs over a particular period of time or in a given SAMPLE.

                                                        OR

• The rate PER second of a vibration constituting a WAVE, either in a material (as in sound waves), or in an electromagnetic FIELD (as in radio waves and light).

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Answer:

Thermal expansion is the tendency of matter to change its shape, area, and volume in response to a change in temperature. Temperature is a monotonic FUNCTION of the average MOLECULAR kinetic ENERGY of a substance. When a substance is heated, the kinetic energy of its molecules increases.

hope it help

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ANSWER:

ANSWER:

Hii Dear,

◆ ANSWER -

Rs = 0.02 Ω

● Explanation -

# Given -

Ig = 1 mA = 0.001 A

Rg = 20 Ω

I = 1 A

# Solution -

Shunt resistance added to convert galvanometer to ammeter is calculated by -

Rs = Ig.Rg / (I-Ig)

Rs = 0.001 × 20 / (1 - 0.001)

Rs = 0.02 Ω

Therefore, a shunt resistance of 0.02 Ω NEED to be connected parallel to the galvanometer to convert it into ammeter.

Hope this is HELPFUL...

EXPLANATION:

pls refer IMAGE also.

As shown in the figure, O is the centre of HEXAGON ABCDEF of each side 8 cm. As it is a REGULAR hexagon OAB, OBC, etc are equilateral triangles. :. OA = OB = OC = OD = OE = OF = 8 cm = 8 x 10-2 m.

The potential at O is.

REFER ANSWER below :

ANSWER:

COMPLETE the QUESTION .

Dear STUDENT,

# Complete question should be -

Q. A GALVANOMETER of resistance 20 ohm gives a full scale deflection when a current of 0.04A is passed through it. It is desired to convert it into an ammeter of full scale reading 20A. The only shunt availaible is 0.05 ohm resistance. The resistance that must be connected in series with the coil of galvanometer is?

◆ Answer -

X = 4.95 ohm

◆ Explanation -

# Given -

G = 20 ohm

S = 0.05 ohm

Ig = 0.04 A

I = 20 A

# Solution -

For galvanometer to be work as ammeter, its resistance should be -

G' = S(I-Ig)/Ig

G' = 0.05 × (20-0.04) / 0.04

G' = 5/4 × 19.96

G' = 24.95 ohm

Let X be extra resistance that must be added to series with galvanometer coil.

G' = G + X

X = G' - G

X = 24.95 - 20

X = 4.95 ohm

Therefore, resistance of 4.95 ohm is added to series with galvanometer coil.

Thanks dear...

when the loop is along the DIRECTION of MAGNETIC FIELD or area VECTOR is perpendicular to the magnetic field

ANSWER:

HEAT Energy=Power×Time

Power=Voltage×Current

Voltage=Current×Resistance

Voltage=5×10=50V

Power=50×5=250W

Energy=250×10(SUPPOSED)=2500J

ANSWER:

F = ma

80 = 50 a

a=80 / 50

a = 1.6

v = u+ at

0 = 20+ 1.6 t

t= 20 / 1.6

t= 12.5

TONGS are Class-3 Levers,they reduce the applied force and HENCE provide BETTER control and manipulation.In these,the effort and the LOAD are on the same side of the fulcrum,however,the effort is closer to the fulcrum so it demands more force to apply a lesser force.

Answer:

An x-ray BEAM CONSISTS of bundles of ENERGY known as photons.

I hope this answers your QUESTION!

ANSWER:

An object that revolves around a PLANET is called a satellite.

Explanation:

...

.

.

PLZ follow me

I hope this is HELPFUL to you

ANSWER:

PLEASE FOLLOW me and THANKS my ANSWERS

Answer:

A breeze blowing TOWARDS the land from the sea, ESPECIALLY during the DAY owing to the RELATIVE warmth of the land.

Explanation:

Heat is the TRANSFER of kinetic energy between molecules. If the VELOCITY is more, the kinetic energy will be more so that the heat is more. Since TEMPERATURE is the measure of heat, the temperature increases as the velocity increases.

hope it HELPS

ANSWER: 494

Explanation:

SEE PIC

ANSWER:

a) 3:1 is the ATMOSPHERE PRESSURE

Answer:

Energy:-

capacity of doing WORK

Work:-

activity involving a PHYSICAL or metal effort to achieve something

Power:-

rate of doing work per UNIT TIME

Answer:

3. 120 ohm

Explanation:

Taking left PARALLEL arrangement,

R1 = 30×60/(30+60) = 1800/90 = 20

Now , since total is 50 ohm then R2 should be equal to (50-20)=30 ohm

30 = 40 × X/(40+X)

120 + 3X = 4X

X = 120 ohm

ANSWER:

Explanation:

(w= angular VELOCITY)

F= m w^2 r

F slip= m w^2 40. --> EQN(1)

F slip= m (2w)^2 R2

F slip=4m w^2 R2 --> eqn(2)

solving 1 and 2

m w^2 40 = 4 m w^2 R2

so R2 = 10 cm

ANSWER:

Two angles are ADJACENT when they have a COMMON side and a common vertex (corner point) and don't OVERLAP.

Explanation:

Track CHANGES is a way for Microsoft Word to KEEP track of the changes you make to a document. You can then choose to accept or REJECT those changes.

Explanation:

A circular coil having 100 turns radius 10 cm CARRIES a current of 5a. It is SUSPENDED vertically in a uniform horizontal magnetic FIELD of 0.5 t the field LINES making an angle of 60degree with the plane of the coil calculated the magnitude of the torque that must be app33on it to prevent it from the TURNING

EXPLANATION:

The 500 μC CHARGE is at the same distance from all the corners of the square. The opposite corners, say A and C, will have the same potential VA = VC

Hope this helps you

ANSWER:

SPEED = 0.05 m/sec., VELOCITY = 0.05 m/sec.

Explanation:

Answer:

Here is your answer

Explanation:

The policy of annexation and EXPANSION of BRITISH empire in India ended. British promised to respect the dignity and rights of the NATIVE PRINCES

EXPLANATION:

USE the FORMULA ∆x × ∆m∆V=nh/4π

Hope this HELPS you

ANSWER:

-20 m/s²

Explanation:

USE equation of motion

a = (v² - u²) / (2S)

= (0² - 20²) / (2 × 10)

= -400 / 20 m/s²

= -20 m/s²

Negative SIGN indicates that it's retardation.

Explanation:

The policy of annexation and expansion of BRITISH empire in India ended. British promised to RESPECT the DIGNITY and rights of the Native PRINCES.

ANSWER:

v=u+at

So the VELOCITY will be FOUR TIMES.

Answer:

100/15 SEC

Explanation:

v=u+at

0=30+at. (108km/h=30m/sec)

at=-30

now

s=ut+1/2at²

100=30t+1/2at²

100=t(30+1/2at)

100=t(30+1/2(-30))

100=t(30-15)=t(15)

t=100/15 sec

Answer:

30 m/s

Explanation:

When the CAR is moving on a level circular ROAD then, centripetal force is supplied by frictional force

mv²/r = μmg

v = √(μrg)

v = √(0.3 × 300 m × 10 m/s²)

= √(900 m²/s²)

= 30 m/s

This is the maximum speed the car can travel, ALSO called safe.

Explanation:

Here is the answer

As in Ideal transformer, there is no losses. HENCE, the CORE of the transformer is FREE from the losses. .

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EXPLANATION:

ANS. in FOURTH ENERGY LEVEL -3.4eV

i) when the diameter is doubled,

resistance decreases.

ii) when the length of the wire is doubled,

resistance increases.

Answer:

e

Explanation:

GRAVITY is a force which tries to pull two objects toward each other. Anything which has mass ALSO has a gravitational pull. The more massive an object is, the stronger its gravitational pull is. EARTH's gravity is what keeps you on the ground and what causes objects to fall.

Gravitation is the attractive force existing between any two objects that have mass. The force of gravitation pulls objects together. Gravity is the gravitational force that occurs between the earth and other bodies. Gravity is the force acting to pull objects toward the earth.

The rechargeable BATTERY provides

potential DIFFERENCE of 330V and can

store up to 64MJ. It TAKES 8 hours for

the battery to receive a full charge.

Answer:

v=30m/s

Explanation:

formula

distance = SPEED×time

distance travell by BUS in 50sec

with speed 10m/s

=50×10=500m/s

now TOTAL distance to be overcome by the SCOOTERIST = 500m + 1000m=1500m

speed REQUIRED =distance/time= 1500/50= 30m/s

Answer:

32