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ong>Explanation:

The projectile motion is a combination of uniform motion and uniform acceleration motion. When an object is thrown with a velocity (v) then, the horizontal component of the velocity (

v

h

) does not change with respect to time and therefore, the following relation holds valid for the horizontal motion:

S

p

e

e

d

=

d

i

s

t

a

n

c

e

T

i

m

e

The vertical component of the velocity (

v

v

) changes at the RATE of

g

=

9.81

m

/

s

2

and therefore, the equations of motion are used to study the vertical motion of the object. These equations are CUSTOMIZED for the vertical motion as:

v

=

u

+

g

t

s

=

u

t

+

0.5

g

t

2

v

2

−

u

2

=

2

g

s

For an object thrown with a horizontal velocity, the initial vertical component of the velocity will be zero. In that CASE, the vertical distance traveled by the object in time (t) will be,

s

=

0.5

g

t

2

⇒

t

=

√

2

s

g

Answer and Explanation:

Given:

HEIGHT of the hill,

H

=

22

m

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ong>Answer:

Light from our first door neighbouring star reaches US in 4.5 year. CALCULATE its distance from earth in kilometre. Velocity of light is 3 X 108 m s-1. Take 1 year = 365 days.

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ong>ANSWER:

Taking the VERTICAL COMPONENT of motion we can assume that the initial velocity is zero so:

s

=

1

2

g

t

2

∴

t

=

√

2

s

g

t

=

√

2

×

80

9.8

t

=

4.04

s

(B)

The horizontal component of velocity is constant so:

Distance = speed x time

∴

d

=

30

×

4.04

=

121.2

m

Explanation:

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ANSWER

body of mass m is 5 KG

R=

(8)

2

+(−16

2

)=

64+36

=10N

θis angle made by force of 8 N

θ=tan

−1

(−6/8)=−36.87

0

the negative SIGN INDICATES THETA clockwise direction respect to the force of MAGNITUDE 8N

force is m X a

a=f/m=10/5=2ms

−2

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ong>Answer:

HEAVY WATER (D2O), also CALLED deuterium oxide

Explanation:

water composed of deuterium, the hydrogen isotope with a mass double that of ordinary hydrogen, and oxygen. (Ordinary water has a COMPOSITION represented by H2O.)

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mal CONDUCTIVITY is actually about the conduction of heat or transfer of heat. 2) Pouring of hot tea in a cup will MAKE the cup of the also warm because of the heat transfer from tea to the cup. 3)Transfer of heat from iron to shirt while pressing is also a GOOD example.....

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ii. A 2/3

the SIZE of the atom

ong>Answer:

When two or more resistors are connected so that both of their terminals are respectively connected to each TERMINAL of the other RESISTOR or resistors, they are SAID to be connected TOGETHER in parallel.

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ong>ANSWER:

C

Explanation:

it's UNIFORM MOTION beacuse ACCELERATION is ZERO

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...............?............?

ISKA matlab

Explanation:

what does this MEANS

nce, during a short CIRCUIT, the CURRENT in the circuit INCREASES HEAVILY

ong>Answer:

The inner transition elements OCCUPY a position in between the elements LANTHANUM (Z=57) and hafnium (Z=72), and between actinium (Z=89) and rutherfordium (Z=104). Elements 58-71, which FOLLOW lanthanum, are the lanthanides, and elements 90-103, which follow actinium, are the ACTINIDES

ong>Answer:

3) executes SIMPLE HARMONIC FORCE

ong>Explanation:

The MOON's MASS is 7.35 x 1022 KG, about 1.2 percent of Earth's mass. Put another way, Earth WEIGHS 81 times more than the moon. The moon's density is 3.34 GRAMS per cubic centimeter (3.34 g/cm3)

ong>ANSWER:

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ong>Answer:

The dual nature of LIGHT means that, in some EXPERIMENTS, light behaves as a wave. In other experiments, light behaves as a particle. In 1801, Thomas Young shined light between two adjacent SLITS.

G = GM/r² is the DERIVATION of the g.

t FIND the initial velocity of the cannonball, after that apply displacement formula to get the HEIGHT reached above the BUILDING, then subtract that height from 30M

ong>Explanation:

Radiation. The energy PRODUCED by stars, a PRODUCT of NUCLEAR fusion, radiates to SPACE as both electromagnetic radiation and particle radiation. The particle radiation emitted by a star is manifested as the stellar wind, which streams from the outer layers as electrically charged protons and ALPHA and beta particles.

ZEROES of the quadratic polynomials F(x)=x^2-PX+q, then find the values ... GIVEN Polynomial => x² - px + q = 0 ... rational number in DECIMAL form....

.......

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

ong>ANSWER:

S=height of tower, g=10 m/s^2

v^2-u^2= 2 gS

(80)^2-(20)^2 = 2*10*S

6400-400 = 20S

6000/20= S

S=300 m

Explanation:

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ong>Answer:

As

Initial VELOCITY = 0 m/s

Time = 5 sec

Acceleration = F/m = 100/10 = 10 m/s²

Final velocity = Initial velocity + (Acceleration × time)

v = 0 + 10(5)

 = 50 m/s

So

i) Final KE = 1/2 × m × v²

              = 12500 J

              = 12.5 KJ

ii) Average POWER = F(v+u)/2

                               = 100 × 25

                               = 2500 watts.

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a

Explanation:

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The mass of an OBJECT is a measure of the object's inertial PROPERTY, or the amount of matter it contains.

The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it.

ong>Answer:

The DISPLACEMENT is x2-x1 , as displacement doesn't depend on which path you TAKE it is direct distance between TWO POINTS.

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ong>Answer:

please SHOW the FIGURE.

EXPLANATION:

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ong>Answer:

Answer:

Answer:

The LAW of Conservation of Mass

The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed SYSTEM. Lavoisier's finding laid the foundation for modern chemistry and revolutionized science.

The Law of Conservation of Mass holds true because naturally occurring elements are very stable at the conditions found on the surface of the Earth. Most elements come from fusion reactions found only in stars or supernovae. Therefore, in the everyday world of Earth, from the peak of the highest mountain to the depths of the deepest ocean, atoms are not converted to other elements during chemical reactions. Because of this, individual atoms that make up living and nonliving matter are very old and each atom has a history. An individual atom of a biologically important element, such as carbon, may have spent 65 million years buried as coal before being burned in a power plant, FOLLOWED by two decades in Earth's atmosphere before being dissolved in the ocean, and then taken up by an algal cell that was consumed by a copepod before being respired and again entering Earth's atmosphere (Figure 1). The atom itself is neither created nor destroyed but CYCLES among chemical compounds. Ecologists can apply the law of conservation of mass to the analysis of elemental cycles by conducting a mass balance. These analyses are as important to the progress of ecology as Lavoisier's findings were to chemistry.

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ong>Answer:

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Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly PROPORTIONAL to the product of their masses and inversely proportional to the square of the DISTANCE between their centers.

Explanation:

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ong>ANSWER:

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ong>Answer:

Yes, it's possible

Explanation:

For example, if you trace a PATH of circle i.e if you start at a point, move around a return to same point then you would have TRAVELLED some distance but the DISPLACEMENT would be ZERO, as your final and initial position are same. Displacement has nothing to do with your path, it only considers the length between your final and initial position. So you can choose any random path, if you return to the same position you started with then yout displacement is zero

________________

★ Gɪᴠᴇɴ ★

• Radius of circular road = 10m
• Mass of the CYCLIST = 90 kg
• The cyclist OBSERVED to be bending INWARD vertical of 30°

___________________

☯ Tᴏ Fɪɴᴅ ☯

• Frictional force acting on the cyclist

___________________

✪ Sᴏʟᴜᴛɪᴏɴ ✪

→ Rsinθ = FS ____(1)

→ Rcosθ = mg ____(2)

DIVIDING equation (1) & (2)

→ tanθ = fs/mg

→ tan(30°) = fs/90×10

→ fs = 900 tan(30°)

→ fs = 900 × 0.577

→ fs = 519.6 ≈ 520N

• ☑ Frictional force acting on the cyclist is 520N

___________________

(i) Seven - segments displays

(ii) Indicator lamps on the front panel of the scientific and laboratory EQUIPMENT's.

(III) Traffic SIGNALS, exit signs , emergency vehicle lighting etc.

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