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51.

Discuss Newton’s laws in the following is) A marble rolling across a smooth flat surface

Answer»

The "forever" PART is DIFFICULT to SWALLOW sometimes. But imagine that you have three ramps set up as SHOWN below. ALSO imagine that the ramps are infinitely long and infinitely smooth. You let a marble roll down the first ramp, which is set at a slight incline. The marble speeds up on its way down the ramp. Now, you give a gentle push to the marble going uphill on the second ramp. It slows down as it goes up. Finally, you push a marble on a ramp that represents the middle state between the first two -- in other words, a ramp that is perfectly horizontal. In this case, the marble will neither slow down nor speed up. In fact, it should keep rolling. Forever.

52.

What change in potential difference is produced by a force that moves a charge of +5x10-6C a distance of 3.50x10-2m in a direction opposite to the direction of an electric field whose intensityis 2.225x10²N/C?​

Answer»

EXPLANATION:

What change in potential difference is PRODUCED by a force that MOVES a CHARGE of +5x10-6C a distance of 3.50x10-2m in a direction opposite to the direction of an electric field whose intensity

is 2.225x10²N/C?

53.

The refractive index of a material is 1.4 if the velocity of light is 3x108m/s find the velocity in the material.​

Answer»

u1/u2=v2/v1

1/1.4=v2/3×10^8

v2=3×10^8/1.4

ans: 3×10^9/14

54.

The mass of earth is​

Answer»

Answer: 5.972 × 10^24 kg

Explanation:

We start by determining the mass of the Earth. ... Because we know the radius of the Earth, we can use the LAW of UNIVERSAL Gravitation to calculate the mass of the Earth in terms of the GRAVITATIONAL force on an object (its WEIGHT) at the Earth's SURFACE, using the radius of the Earth as the distance.

55.

Define Impulse in simple terms​

Answer»

EXPLANATION:

Impulse is the change of MOMENTUM of an OBJECT when the object is acted upon by a force for an INTERVAL of time. So, with impulse, you can calculate the change in momentum, or you can use impulse to calculate the average impact force of a collision. The FORMULA for impulse is: Impulse = Force * time = force * Delta t.

56.

Which of the following is kg.m/s(square)n/m(square)newtonpascal watt​

Answer»

ANSWER:

NEWTON......................

HOPE so.

57.

Define Momentum in simple terms. ​

Answer»

Explanation:

MOMENTUM, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of CHANGE of momentum is equal to the FORCE ACTING on the PARTICL

58.

9.8kg is equivalent to( plz tell N)​

Answer»

Answer:

98N

Explanation:

F = mg

m=9.8

G =10

F=9.8*10

F=98N

59.

Equivelent weight of 9.8kg is​

Answer»

9800 grams.

1kg=1000gm

9.8×1000

=9800

60.

Quantiity of motion present in a body is known as​

Answer»

Explanation:

The main quantity that MEASURES the motion of a body is MOMENTUM. An object's momentum increases with the object's MASS and with its velocity

hope it helps

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61.

Quantiity of motion present in a body is known asmo​

Answer»

ANSWER:

Answer is:- MOMENTUM.

62.

Read the scenario and solve these two problems.When traveling at top speed, a roller coaster train with a mass of 12,000 kg has a velocity of 30 m/s. The kinetic energy of the train at top speed isJ.Given this kinetic energy, what is the tallest hill this roller coaster train can reach the top of?The train can climb a hill that ism high.Pls help im timed!!!!!!!!!!!!:c

Answer»

Given:

When traveling at top speed, a roller COASTER train with a mass of 12,000 kg has a velocity of 30 m/s.

To FIND:

  • Max HEIGHT of the hill , it can climb ?

Calculation:

Kinetic Energy is a subtype of mechanical energy poses by the body by virtue of its motion.

\sf \therefore \: KE =  \dfrac{1}{2} m {v}^{2}

\sf \implies \: KE =  \dfrac{1}{2}  \times 12000 \times  {(30)}^{2}

\sf \implies \: KE =  6000 \times  {(30)}^{2}

\sf \implies \: KE =  6000 \times  900

\boxed{ \sf \implies \: KE =  54 \times  {10}^{5}  \: joule}

Now, while climbing the tallest hill, the whole kinetic energy will be converted to potential energy of the roller coaster.

\sf \implies \: KE =  54 \times  {10}^{5}   = PE

\sf \implies \: mgh =   54 \times  {10}^{5}

\sf \implies \: 12000 \times 10 \times h =   54 \times  {10}^{5}

\sf \implies \:1.2 \times  {10}^{5}  \times h =   54 \times  {10}^{5}

\sf \implies \:h =  \dfrac{54}{1.2}

\sf \implies \:h =  45 \: metres

So, height of tallest hill is 45 metres.

63.

Boat A and Boat B have the same mass. Boat A’s velocity is three times greater than that of Boat B. Compared to the kinetic energy of Boat B, the kinetic energy of Boat A is

Answer»

Answer:

THREE TIMES the kenetic energy of BOAT B

64.

Rachel tells her older cousin Alana, whom she does not visit often, that she plans to marry a divorced man. Alana has never met Rachel’s fiancé. “How can you marry that man?” asks Alana. “He hass been divorced. That means he has an argumentative streak. If he could not get it right the first time, how can you expect him to the second?”

Answer»

ANSWER:

FOLLOW me then I will follow U too

65.

7. The mass of an electron is 9.11 x10 kg convert it into:1 Gram ii) milli gram iii) centigram iv) micro gra​

Answer»

ANSWER:

GRAM............. . .....

66.

Read the scenario, then answer the questions.A 2 kg ball is thrown upward with a velocity of 15 m/s. What is the kinetic energy of the ball as it is being thrown?JWhat is the potential energy of the ball when it gets to its maximum height just before falling back to the ground?J

Answer»

ANSWER:

HEEHHEHEHEHEHEHEHHEHE BOIIIIIIII

67.

Which state(s) of matter have no definite shape or volume?liquids and solidsliquids and gassesgassessolids

Answer»

ANSWER:

GASSES

Explanation:

GASES have no definite SHAPE or VOLUME

68.

A crane lifts a cargo box 10 m off the ground. If the crane lifts the cargo box twice as high, the potential energy will increase by

Answer»

Answer:

2 TIMES...............

69.

Paragraph on food of Sikkim for project​

Answer»

Answer:

Rice is a staple food, and fermented foods traditionally constitute a significant portion of the CUISINE. NEPALESE cuisine is popular, as SIKKIM is the only state of INDIA with an ETHNIC Nepali majority. Many restaurants in Sikkim serve various types of Nepalese cuisine, such as the Newa and Thakali cuisines.

i hope this helps you

HAVE A GREAT DAY!!

70.

What happens to the total mass of a substance undergoing a physical change?It stays the same.It doubles.It triples.It is reduced.

Answer»

ANSWER:

It STAYS The Same

I HOPE IT HELPED

71.

I like Mexican And Indian guys.arts

Answer»

EXPLANATION:

OOO IM from NEPAL STRANGER

72.

A bullet of mass M = 1 kg, moving with a horizontal velocity of 8 m/s, hits and sticks to a block B of mass 4M= 4 kg which is initially at rest.Find the speed of the 4M block after collision.

Answer»

Answer:

1.6 m/s

Explanation:

Given:

Mass of the bullet = 1 kg

Velocity of the bullet = 8 m/s

Mass of the BLOCK = 4 kg

To FIND:

Speed of the COMBINED block and bullet after collision

Method to find:

First, we need to find out the total momentum of the carriages before the collision.

p = m * v  (Momentum = Mass * Velocity)

Momentum of the bullet:

p = 1 * 8

⇒ p = 8 kg m/s

Momentum of Block B:

p = 4 * 0 (Since it was at rest)

p = 0 kg m/s

Total momentum of the bullet and the block:

8 + 0 = 8 kg m/s

By applying the LAW of conservation of momentum, we can state that the sum of momentum of the 2 bodies before collision will be equal to the sum of momentum of the 2 bodies after the collision.

Now, we need to find the total mass of the bodies after the collision:

4 + 1 = 5 kg

Since they are 2 non-elastic bodies, their final velocity will be the same.

To find the final velocity,

p = m * v

⇒ 8 = 5 * v

⇒ v = 8/5 = 1.6 m/s

Hence, the speed of the 4M block after collision will be 1.6 m/s.

73.

Follow ure true friend or brother..Ishu005​

Answer»

EXPLANATION:

YA sure✌️

take care

be HAPPY

74.

A particle of mass m moves with constant speed von a circular path of radius r as shown in figure. Theaverage force on it during its motion from A to B lsA-3.0€B13mv221trmv2(2)r213mv2(3)tr313mv2(4)4tr​

Answer»

Answer:

Themagnitudeofavgforce

F

av

isgivenby

F

av

=

Δt

Δp

v

f

=vcosθ

i

+vsinθ(−

j

)

v

i

=v

j

Δp

=

p

f

p

i

=m

v

f

−m

v

i

=mvcosθ

i

+(−mvsinθ−mv)

j

=

2

mv

3

i

2

3mv

j

Δp

=mv

4

3

+

4

9

=mv

3

Δt=(

v

2πr

)

3

2

F

av

=

(

v

2πr

)

3

2

mv

3

=

3

3

r

mv

2

75.

Position time graph of a body of mass 5 kg isgiven in the diagram. The impulse on body att = 3 s, isx(m)18-12-6-1 2 3 4 5t(s)(1) 30 kg m s -1(3) 6î kg m s-1(2) -30 kg m s -1(4) -6 kg m s -1​

Answer»

Answer:

Impulse = final MOMENTUM - initial momentum

MOVEMENTUM = m*v

Impulse = 5*0 - 5*6 = -30i

76.

Give definition of Gravity❣️Follow Me For Beautiful and easy QUESTIONS.​

Answer»

Explanation:

Gravity, or gravitation, is a natural PHENOMENON by which all things with MASS or energy—including planets, stars, GALAXIES, and even light—are brought toward one another. On Earth, gravity GIVES weight to physical OBJECTS, and the Moon's gravity causes the ocean tides.

77.

What transportation technology was first invented for roller skates?

Answer»

Required answer:-

JAMES Plimpton invented the roller skates with 4 WHEELS. He was a great man.

Brainliest .. !! ❤⚡

78.

Two vectors can be added by simple arithmetical method when they are at an angle of

Answer»

Answer:

0 or pi

Explanation:

As 0 or pi angle will give then same or OPPOSITE DIRECTION which ALLOW us to deal with magnitude only

79.

Enjoy the spam.........✌️joke translated to English​

Answer»

ANSWER:

OKAY THANKU SOOO MUCH..........

80.

Find center of mass​

Answer»

The CENTER of mass is a point in a system that responds to external FORCES as if the total mass of the system were CONCENTRATED at this point. The center of mass can be calculated by taking the masses you are TRYING to FIND the center of mass between and multiplying them by their positions.

81.

The flying of airplane is based on which principle

Answer»

The Bernoulli Principle

Airplanes FLY when the MOVEMENT of air across their wings creates an UPWARD FORCE on the wings (and thus the rest of the plane) that is greater than the force of gravity pulling the plane TOWARD the earth.

82.

The flying of airplane is based on which principle ? ​

Answer»

The BERNOULLI PRINCIPLE

83.

Changes of motion are caused by A. All forcesB.strong forces. C.balanced forces. D.unbalanced forced.

Answer»

D. UNBALANCED FORCES is the RIGHT ANSWER ACCORDING to me.

84.

What is a drawback of plasma displays compared to LCD displays?

Answer»

EXPLANATION:

Power consumed by LCD DISPLAYS < Power consumed by PLASMA displays.

That is,

Plasma displays TAKE more power when compared to LCD displays.

LCD displays use ½ of power of plasma displays.

85.

jack and Amir are both standing on identical skateboards and preform a physics experiment in which they push off one another to move. Jake is taller and more massive than Amir. if jack pushes with 20 N of force, what force would w\he feel backwards away from Amir? F= N

Answer»

ANSWER:

-20N

hence OPPOSITE DIRECTION

86.

Please answerno spam pleaseI'll mark brainliest of you justify your answer​

Answer»

Answer:

The answer is W+(X.Y)

EXPLANATION:

In the given diagram, W and X, and W and Y passes through two different OR GATE.

So, we get W+X and W+Y.

Then W+X and W+Y pass through a single AND gate which gives

F = (W+X).(W+Y)

So USING inverse of associative law of boolean logic which states

that A + B.C = (A+B)(A+C), we get,

F = (W+X).(W+Y) = W+(X.Y)

PLEASE MARK IT THE BRAINLIEST

87.

Please answerno spam pleaseit's urgentif you can justify your annswer I will mark it brainliest​

Answer»

ANSWER:

SECOND ONE is your answer

88.

What is electroluminescence in LED?

Answer»

EXPLANATION:

LEDS create LIGHT by electroluminescence in a semiconductor material. Electroluminescence is the phenomenon of a material EMITTING light when electric current or an electric field is passed through it - this happens when electrons are sent through the material and fill electron HOLES. ... They emit photons (light).

89.

5) Deduced the molecular mass of following compound :- NaCl illustration​

Answer»

ANSWER:

mmmmmmmmmmmmmmmmm

hmmmmm

90.

What is one example of artificial light produced by electric discharge?

Answer»

Explanation:

Gas-discharge lamps are a family of ARTIFICIAL LIGHT sources that emit light by sending an electrical discharge through an ionised gas, i.e. plasma. TYPICALLY, such lamps are filled with a NOBLE gas (argon, neon, krypton and xenon) or a MIXTURE of these gases.

91.

3) Classify the following into potential energy and kinetic energy?a) Water stored on the top of hillb) An arrow released form stretched bowc) A stretched springd) A revolving electric fan​

Answer»

Answer:

a - potential ENERGY

b - kinetic energy

c - potential energy

d - kinetic energy

Explanation:

Potential energy is energy that is stored or conserved, while kinetic energy is energy DUE to its motion

I hope this answers your question and your'E welcome in advance!

92.

What is Universal Law of Gravitation?Correct and proper answer -----> Marked brainliest

Answer»

Answer:

Newton's law of universal gravitation STATES that every point mass in the UNIVERSE attracts every other point mass with a force that is directly PROPORTIONAL to the PRODUCT of their masses and inversely proportional to the square of the DISTANCE between them.

HOPE IT HELPS!!

93.

What is the net work done on block A in first twoseconds if a downward force of 50 N is alsoapplied on block A?U3 kg A80N SONB8 kg​

Answer»

Answer:

0

this is DUE to EQUAL force in both the direction so NET WORK done will be zero

hope this will help you dear ;

94.

Define Quantum Mechanics ❣️​

Answer»

Answer:

Quantum mechanics, science DEALING with the behaviour of matter and LIGHT on the ATOMIC and SUBATOMIC scale. It ATTEMPTS to describe and account for the properties of molecules and atoms and their constituents—electrons, protons, neutrons, and other more esoteric particles such as quarks and gluons.

95.

A system of pulleys is used to raise a load of bricks that weighs 1,700 newtons. The force applied to the pulley is 340 newtons. What’s the mechanical advantage of this machine?A. 1B. 2C. 5D. 10

Answer»

Answer:

Answer:

1. Inside BUILDINGS. You might have noticed that large office buildings, stores, hospitals, and other many other buildings have convex mirrors in the corners.

2. Sunglasses. We might have used sunglasses many times.

3. VEHICLE mirrors.

4. Magnifying GLASSES.

5. For security purposes.

6. Street LIGHT reflectors.

Hope it can help you...

96.

Determine the quality of stream for the following cases:p=10 bar,v=0.180 M3/kg​

Answer»

ANSWER:

ZOP Xixtxiz Zkzkxylxlyxykxfykxylxkydydlyd Dousykdsykdydkyxykxykxykxkyxykxkyfkyxykdkydykzkyz

97.

What is the least count of an instrument​

Answer»

ANSWER:

the LEAST count is ALWAYS 0 for an INSTRUMENT

98.

While you are at the bottom of the cliff, someone from the dealership you bought the spaceship arrives with a spare set of keys. He doesn’t want to go all the way down there, so he tosses you the key at a 1.5 m/s @ 60o below horizontal. You need to catch the keys to look cool, since you are embarrassed about losing your keys. Where do you stand to catch the keys?

Answer»

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

99.

Main parameter of mechanical system​

Answer»

Answer:

Introduction. There are three fundamental PHYSICAL ELEMENTS that make up translating mechanical system: inertia elements, springs and friction elements. The relationships between force and position (or its DERIVATIVES) for these elements are DESCRIBED below.

Explanation:

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100.

Is there any possibility of reopening of colleges for class 11, in December. ​in andhra pradesh???​

Answer»

Explanation:

Consonants are usually classified according to place of ARTICULATION (the location of the stricture made in the VOCAL tract, such as dental, bilabial, or velar), the manner of articulation (the way in which the obstruction of the airflow is accomplished, as in STOPS, fricatives, approximants, TRILLS, taps, and LATERALS ...