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551.

Can a body which moves at constant speed have acceleration?

Answer»

EXPLANATION:

No when a BODY has CONSTANT speed acceleration is zero. ( Please MARK me BRANLIEST your well wisher).

552.

An object moves 6 km due west and then 8 km duemorth. Find the distance covered by the object and its displacement.​

Answer»

Solution :

Displacement -

Displacement is the shortest distance from the origin to the final point. According to the QUESTION, (refer the attachment) AC FORMS the shortest distance.

By Pythagoras THEOREM,

In ∆ ABC,

>> HYPOTENUSE = CA = y

>> Height = BC = 8 km

>> Base = BA = 6 km

\bigstar \: {\boxed{\sf{(Hypotenuse)^{2}  = (Base)^{2} + (Height)^{2}}}}

⇒ (y)² = (6)² + (8)²

⇒ y² = 36 + 64

⇒ y² = 100

⇒ y = √100

⇒ y = 10

CA = 10 km

Shortest distance = 10 km

Therefore, the displacement is 10 km.

\rule{300}{1.5}

Distance -

⇒ 8km + 6km

⇒ 14 km

Therefore, the distance covered is 14 km.

553.

Nobel Prize forPhysics (1983)2Nobel Prize forPhysics (1983)5 in India ​

Answer»

ANSWER:

AMARTYA SEN

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554.

10N Force act on a body at 45 degree its X and y components are

Answer»

Given:

Magnitude of force, F = 10 N

Angle with x axis, t = 45°

To FIND:

x and y components

Solution:

x COMPONENT of force = F cos t = 10× cos(45) = 5.25 N

y component of force = F SIN t = 10× sin(45) = 8.51 N

Answer:

F = (5.25 i + 8.51 j) N

555.

Mechanical theory was of head was introduced by

Answer»

ANSWER:

In an internal combustion engine, the cylinder head sits above the cylinders on top of the ... In a flathead or sidevalve engine, the mechanical PARTS of the VALVE train are all contained ... Modern, efficient engines thus tend TOWARDS the pent roof or hemi designs, where the valves are BROUGHT close into the center of the space.

Explanation:

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556.

Write down metre, kilometre, millimetre, nanometre in the descending order? A. m, km, mm, nm B. nm, m, km, mm C. km, m, mm, nm D. nm, km, m, mm

Answer»

ANSWER:

kilometre METRE millimetre nanometre

hence OPTION C is RIGHT

557.

What are the three types of lightning?​

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ANSWER:

There are three primary types of lightning which include: cloud-to-ground (the most commonly KNOWN TYPE), cloud-to-air, and cloud-to-cloud. With cloud-to-ground lightning, the RAPID discharge of lightning is a channel of negative charge that is attracted to the POSITIVELY charged ground.

558.

Fill in the blanks . If a force of 50 N is applied on an surface of 100 m², then the pressure isd. The unit of pressure ise. Magnetic force is a ---type of force.​

Answer»

Answer:

Answer: Force per unit AREA is defined as the PRESSURE. If 1 N of force is ACTING over an area of 1 m2

Explanation:

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559.

8. Find out the odd one from the given units? (metre, newton, kilogram, second ) option A. metre B. newton C. kilogram D. second

Answer»

ANSWER:

NEWTON

because it is NAMED after a scientists

hope it will HELP you

560.

Ozone+.....?.....=oxyzen​

Answer»

Answer:

Ozone ( O3 ) is a MOLECULE MADE up of three oxygen atoms. Oxygen ( O2 ) is made up of 2 oxygen atoms. Therefore , by removing one atom of oxygen we can convert ozone into oxygen.

Hope it helps :)

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561.

1) Who was the gomastha? What was his relationship with the Indian weaver?​

Answer»

Answer:

Gomasthas were Indian agents employed by the East India Company to sign agreements with LOCAL weavers and artisans to deliver GOODS to the Company. The relationship between gomasthas and Indian weavers got strained because gomasthas would FORCE these weavers to deliver their cloth to the Company at LOW prices.

Explanation:

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562.

Two vector F1 and F2 are right angle to each other the magnitude of resultant I is called

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EXPLANATION:

i HOPE it will HELPS you

563.

Least Count of a metre scale is..........................

Answer»

Answer:

0.2 mm

The least count error is the error associated with the RESOLUTION of the instrument. If we use a metre scale for MEASUREMENT of length, it MAY have graduations at 1 mmdivision scale SPACING or interval. A Vernier scale on CALIPER may have a least count of 0.2 mm while a micrometer may have a least count of 0.01 mm.

564.

2. Sundial is used in ancient time to measure...........................? options A. height B. length C. weight D. time

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ANSWER:

D)TIME

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

565.

7.A tank is filled with water to the brim. The pressure of water is maximum ativ. same everywhere.1. centre,ii, bottomiii, top​

Answer»

A tank is FILLED with water to the brim. The PRESSURE of water is MAXIMUM at

ii, bottom

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566.

Describe some events that Show the presence of static elctricity / electrostatic electricity

Answer»

Answer:

SEARCH Results

Featured snippet from the web

Static electricity is the result of an IMBALANCE between negative and positive CHARGES in an object. These charges can build up on the surface of an object until they find a way to be released or discharged. ... The RUBBING of certain materials against one ANOTHER can transfer negative charges, or electrons.

Static electricity is an imbalance of electric charges within or on the surface of a material. The charge remains until it is able to move away by means of an electric current or electrical discharge. Wikipedia

Videos

567.

Which of the following is a strong acid? (a) Nitric acid (b) Citric acid (c) Acetic acid (d) Tartaric acid

Answer»

ANSWER :

Nitric acid

Explanation :

  • Strong Acids :

The acid that completely ionise in the aqueous solution is called a strong acid . The lesser the pH VALUE of an acid , strong will be its acidic character . A strong acid releases more \tt{H^+} when dissolved in water .

These acids are also called mineral acids as they are formed from the minerals from the earth . Some common examples of strong acids are : Hydrochloric acid (HCl ) , Sulphuric acid \tt H_2SO_4 , Nitric Acid \tt HNO_3 , etc .

  • Weak Acids :

The acids which do not ionise completely in aqueous solution and give less \tt H^+ IONS are called weak acids . These acids have high pH value and are mostly eatable .

These acids are naturally occurring acids . For EXAMPLE : Citric acid (in citrous fruits) , TARTARIC acid (in tamarind) , acidic acid (in vinegar) , formic acid (in ant sting) , etc.

568.

Heat transfer can takes place from colder bodies to hotter bodies True or False Please answer only true or false

Answer»

this STATEMENT is FALSE

569.

What is newton third law​

Answer»

ANSWER:

third law states that for every action (FORCE) in NATURE there is an equal and OPPOSITE reaction.

Explanation:

In other words, if object A EXERTS a force on object B, then object B also exerts an equal and opposite force on object A.

570.

X/5-x/6=4 the value of x is​

Answer»

ANSWER:

\frac{x}{5}  -  \frac{x}{6}  = 4

TAKE L.C.M

\frac{6x - 5x}{30} = 4

\frac{x}{30}  = 4

x = 30 \times 4

x = 120

571.

What is transparent screen ?​

Answer»

A see-through display is an ELECTRONIC display that allows the user to see what is shown on the glass SCREEN while STILL being able to see through it.

EXPLANATION:

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572.

if an object is moving with constant speed then its distance time graph will be a straight line along time axis along distance axis parallel to time axis inclined to time axis i want the correct answer

Answer»

Hi.

The answer is:

If an object is MOVING with constant speed then its DISTANCE TIME GRAPH will be  INCLINED to time axis.

573.

A particle is moving along the sides of an equilateral triangle of side 'a' starting from a verter in clock wise direction (1) Find the maximum possible displacement. (ii) Find the least pos sible displacement when the particle is on opposite side of starting vertex.​

Answer»

i) Max DISPLACEMENT is ALONG the side. = a

ii) Least displacement when PARTICLE is on OPPOSITE side = height of a EQUILATERAL triangle= \frac{a\sqrt{3} }2

574.

Which fuel does not leave residue. a) Coal b) Wood c) Kerosene oil d) Cow dung cakes

Answer»

ANSWER:

xxxxx cccahssm emebr rnr DBD

575.

Draw a labelled ray diagram to locate the image of an object placed 5 cm in front of a plane mirror?

Answer»

ANSWER:

hiii

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576.

Helllllllllllloooooooooooo​

Answer»

ANSWER:

Hiiiiiiiiiiiiiiiiiiiiiiiii DEAR...

577.

Green plants make their own food. Humans cook their own food. Then why humans are not known as producers?Explain​

Answer»

ANSWER:

humans cook FOOD that are raw PLANTS and plant wont take any thing from you to cook its own ..

THATS why they are producers because they are self reliable .

578.

A car of mass 2000kg is moving with a velocity of 72kmph. It is stopped by applying brakes in 20 seconds. find the force of brakes applied by brakes on the wheel is: a: 2000 N b: 1000 N c: (-2000 N) d: (-1000 N)

Answer»

ANSWER:

ddooooooooooooooooooooo

579.

What will be displacement travelled by a man running around a Circular field of radius 28 m in 10 seconds, if his speed is 8.8 m/s (uniform). Take π=22/7.

Answer»

ANSWER:

DF. KK ITCH BEST is so no to

580.

4. What ways do you suggest to reduce5. What conditions are needed for static friction to come into6. Give examples of practical application of static friction. (A7. Give examples showing the existence of sliding friction. (A8. Explain how can you measure frictional force? (AS)9. Explain how does lubrication reduces friction? (AS)10. What kinds of friction do you know? (AS)11. Explain why sliding friction is less than static friction? (A12. Give examples of how is friction responsible for energy wareduce energy wastages by friction. (AS)13. Seetha is observing a moving bus with the luggage on it​

Answer»

Answer:

9.How does lubricant REDUCES friction

Explanation:

Lubricant SEPRATES the surface of the bodies in contact.Therefore, reduces the PERCENTAGE of INTERLOCKING in between the surfaces.In this way it helps in REDUCING firction

Hope it helps

581.

If a ball projected vertically upward 8 meters then find the work done by gravity​

Answer»

[tex]     Body{ background-color: black; font-family: cursive; } .glow{ font-size: 80px; color: #fff; text-align: center; -webkit-animation: glow 1s ease-in-out infinite alternate; -moz-animation: glow 1s ease-in-out infinite alternate; animation: glow 1s ease-in-out infinite alternate; } @-webkit-keyframes glow{ from{ text-shadow: <klux>0</klux> 0 10px #fff, 0 0 20px #fff, 0 0 30px #e60073, 0 0 40px #e60073, 0 0 50px #e60073, 0 0 60px #e60073, 0 0 70px #e60073; } }    HELLO[/tex]

The equation is given as v

2

−u

2

=2as.

where,

v = FINAL velocity,

u = initial velocity,

a = acceleration due to gravity, 10m/s

2

,

s = h = HEIGHT traveled.

Therefore, we can find u with above info. In this CASE, v = 0 at the top of the path.

0−u

2

=2×10×5=10m/s.

Hence, the initial velocity of the ball was 10 m/s.

582.

To increase the temperature of a 5 kg body from 240 K to 260 K, 35000 J heat is consumer. The specific heat capacity of the material of the body is;​

Answer»

ANSWER:

SHAKA LAKA BOOM boom ....;"$$$$

583.

Make a list of few more examples ofthe situations where we need to reducefriction for efficient functioning of tools​

Answer»

ANSWER:

The HANDLE of doors

Explanation:

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584.

when the lens of a projector for powerpoint presentation is half covered , what happens to the image on the screen?

Answer»

ANSWER:

Half of the PRESENTATION gets COVERED on the screen

585.

What are the factors that continuously at upon the molecules involved in evaporation ​

Answer»

ANSWER:

..#@Ñ$W£R....

Factors That Affect the Rate of Evaporation

Factors That Affect the Rate of Evaporationtemperature of the LIQUID. A cup of hot water will EVAPORATE more quickly than a cup of cold water.

Factors That Affect the Rate of Evaporationtemperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.exposed SURFACE area of the liquid. ...

Factors That Affect the Rate of Evaporationtemperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.exposed surface area of the liquid. ...presence or absence of other substances in the liquid. ...

Factors That Affect the Rate of Evaporationtemperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.exposed surface area of the liquid. ...presence or absence of other substances in the liquid. ...air movement. ...

Factors That Affect the Rate of Evaporationtemperature of the liquid. A cup of hot water will evaporate more quickly than a cup of cold water.exposed surface area of the liquid. ...presence or absence of other substances in the liquid. ...air movement. ...CONCENTRATION of the evaporating substance in the air.

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586.

Explain in detail..... please...please do in copy and upload in brainy..I will very great full to him / her...........​​

Answer»

ANSWER:

Car

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587.

Explian free fall in simple words

Answer»

ANSWER:

it is any motion of a BODY where GRAVITY is the only FORCE acting UPON it

588.

Sound travels fastest in______________.

Answer»

ANSWER:

TRAVELS FASTEST in SOLID

589.

Sound is a form of energy which produces a sensation of________________. a. light b. hearing c. feeling d. taste

Answer»

Answer:

hearing

Explanation:

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590.

Solve please......explain in detail......​

Answer»

ANSWER:

Ct7zfugpuctixitcpjjfi y

591.

Please say answers from this choose the best​

Answer»

From which ? I GUESS you FORGOT to PUT the ATTACHMENT

592.

Metalloids possess the properties of 1.metals2.non-metals3.both metals and non-metals4.none of these​

Answer»

ANSWER:

Both METALS and NON metal

Explanation:

\huge\color{green}hope \: helps

593.

5113 ka 25 percent kitna hoga?​

Answer»

ANSWER:

594.

Explain the following term with the help of diagram given : free fall (Skill)A(u==0)LOD190B(V.)hton(h-s)patOM V tomtoSponsoNOUOU SIONB(V)Ground levelty​

Answer»

ANSWER:

PLEASE MARK me as BRAINLEST

595.

Q5] (A) - State properties of free fall (Understanding)​

Answer»

ANSWER:

There are two IMPORTANT motion characteristics that are true of free-falling objects:-

  • There are two important motion characteristics that are true of free-falling objects:Free-falling objects do not encounter air resistance.

  • All free-falling objects (on Earth) accelerate downwards at a rate of 9.8 m/s/s (OFTEN approximated as 10 m/s/s for back-of-the-envelope calculations)

Explanation:

HOPE IT HELP YOU ✌

596.

Define focal length :-)

Answer»

Answer:

FOCAL length is the DISTANCE between the POLE and PRINCIPAL focus of a mirror.

Explanation:

HOPE IT HELPS YOU

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597.

GROUP AWorkAccelerationGROUP Bw1А20BJ2сm/s?S7172D(Understanding)(B) State true or false , explain if false :Work and energy are vector quantities0 TO​

Answer»

EXPLANATION:

SORRY, I can't UNDERSTAND the QUESTION

598.

Numirical 1. if a room has length of 10 m and breadth of 8 m . calculate the carpet area needed for it .answer is 80 I need all solution​

Answer»

Area = l×b

= 10 × 8

= 80

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599.

Why the football , basketball and volleyball are designed differently ?

Answer»

Basketball and VOLLEYBALL have three differences. The first difference is the courts. There is a net in middle of a volleyball COURT, but there is nothing blocking a basketball court. And volleyball players have to stay on their own side. But basketball players can run up and down the entire court freely.

Basketball and volleyball have three differences. The first difference is the courts. There is a net in middle of a volleyball court, but there is nothing blocking a basketball court. And volleyball players have to stay on their own side. But basketball players can run up and down the entire court freely. The second difference is the size of the ball and how hard it is. Volleyballs are made of leather. Basketballs are made of SYNTHETIC rubber and have a LOT of dents all over the surface.

Basketball and volleyball have three differences. The first difference is the courts. There is a net in middle of a volleyball court, but there is nothing blocking a basketball court. And volleyball players have to stay on their own side. But basketball players can run up and down the entire court freely. The second difference is the size of the ball and how hard it is. Volleyballs are made of leather. Basketballs are made of synthetic rubber and have a lot of dents all over the surface. The third difference is the rules. Volleyball players must not DROP the ball. If they do, they will lose the point. Basketball players dribble the ball and shoot it at the hoop

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600.

Dark colours are good absorbers of heat explain​

Answer»

ANSWER:

well dark COLOURS are good absorbers of heat bcoz they are gud absirbers of LIGHT well an object appears dark only when it ABSORBS all the light falling on it