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Finding the acceleration due to gravity

the time period of SIMPLE pendulum (I) and acceleration due to gravity (g), which is expressed by RELATION,

T=2π√l/g ----------(1)

for small AMPLITUDE oscillations,


T square= 4π square l/g
I.e;

g= 4πsquare l/t square-----------(2)
if we know the value of L and T, we can calculate the acceleration due to gravity , g at that place.

the l-t square graph

we can plot a graph between l and T2 square by taking l along the x axis and T2 along the y axis. The graph is a straight line.(graph is given above)

from the graph,


l/t square= AB/BC=---------cm square

g= 4π square (AB/BC)




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The ANS is 2×10 KI POWER 8

No it is not necessary that the particle moving with UNIFORM speed is moving along a STRAIGHT line as speed is a scalar quantity it does not DEPEND upon direction

54kilometer / HOUR is the ANSWER

A frame of reference that moves with constant velocity with respect to an inertial frame is also an inertial frame. For example: Newton's LAWS WORK in the physics lab, which is FIXED to the Earth. Therefore they also work in a TRAIN MOVING with constant velocity with respect to the Earth.

He will NEVER fall in the pit.
Because he is going forward more quickly than he is FALLING down and COMING BACKWARD

Vector:- force,DISPLACEMENT, magnetic field, velocity,
scalar:- SOUND, ELECTRIC CURRENT, distance , speed,

Top 5 Steps to Reduce Your ENERGY Consumption

Shutdown your COMPUTER. Computers are some of the biggest energy users in office buildings. ...

Choose the right light. LED bulbs are the most energy-efficient lighting option. ...

Eliminate vampire power:

UNPLUG idle electronics. ..

.Use a power strip to reduce your plug LOAD. ...

Turn off the lights.

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Any THING DIVIDED by NUMBER ZERO is infinite . speed of light is not constant its speed depend upon medium.

Speed of the train in the FIRST 30 km, V1 = 30 km/h
Speed of the train in the next 90 km, v2 (to be determined)
Average speed = 60 km/h = (v1 + v2)/2 
                                          = (30 km/h + v2)/2 

⇒ v2 = 90 km/h
I THINK it's HELP U

As an object begins to move faster, air resistance or drag increases. Drag means the AMOUNT of air resistance impacting an object when it is moving. ... When the air is DENSER, this slows down the movement of OBJECTS because the object has to shove aside heavier MOLECULES.

This constant ratio is called the COEFFICIENT offriction and is usually symbolized by the Greek LETTER MU (μ). Mathematically, μ = F/L. Because both friction and load are measured in units offorce (such as pounds or newtons), the coefficient of friction is DIMENSIONLESS.

The vector difference between the VELOCITIES  of TWO bodies : the velocity of a body with respect to another REGARDED as being at rest

Inertia of motion STATES that if a body is in motion its remain in motion it poses REST and if a body is in rest is it REMAINS in this is poses the motion there are basically Three TYPES of inertia inertia of motion inertia of rest and inertia of direction

122850000
grams MAYBE I am not so SURE

D)is the CORRECT option
because the reaction in which ACIDS and bases react to FORM SALT and water is called neutralisation.

8/9 will RELATIVE INDEX of WATER relative to water

a) HYDROGEN GAS

hydrogen gas is produced.

Mg + HCL = MGCL2 + H2

When balanced forces act on an object at rest, the object will not move. If you push against a wall, the wall pushes back with an equal but opposite FORCE. Neither you nor the wall will move.Forces that cause a change in the motion of an object are UNBALANCED forces.
This is an example of balanced forces. The force exerted by each person is equal, but they are pushing in opposite directions, in this case together. It WOULD look something LIKE this. Because the force that each of you is exerting is equal, the two forces cancel each other out and the resulting force is zero.

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Heya mah!! DEAR friends........

we rubbed our palms TOGETHER in WINTER season......
there's REASON..............

When we rub hands friction is produced between our hands which in turns produces heat. This causes us to feel warm.

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F = ma
F = 1000*(15-0)/2
= 7500

Static FRICTION,rolling friction,sliding friction....MAY be it HELPS U

Initial VELOCITY U = u
Final velocity V = -4u
height of tower =h
acceleration = -g
See further SOLUTION in COMMENTS below....

The NORMAL PH value of HUMAN BEINGS is USUALLY 7 to 7.8 ...

D) red
hope it HELPS you

Suppose a BOOK is lying on the table .it is at rest .the book will not move by itself that is ,it cannot CHANGE its position of rest by itself.it can chage its state of rest only when complled by the FORCE of our hands ,that is when we LIFT the book from the table. thus the position of rest of the book has been CHANGED by the external force of our hand.
I will hope that it will help you.

Answer:

5 Sec

Explanation:

a particle starts moving with initial velocity 5m/s. It is accelerating with a constant acceleration 2m/s at an angle 120 degree with the direction of initial velocity. FIND the TIME after which its speed would be √3 times that of the initial speed

Particle Velocity = 5 m/s

Acceleration = 2m/s  at an angle of 120

Acceleration in direction of Velocity = 2Cos120 = -2Cos60  = - 1 m/s

Acceleration in Direction Perpendicular to Velocity = 2Sin120 = √3 m/s

Let say  the time T after which its speed would be √3 times that of the initial speed

Velocity in Original Direction = 5 - T

Velocity Perpendicular to Original Direction = 0 + √3T = √3T

Velocity at T = √(5 - T)² + (√3T)²  = 5√3

Squaring both sides

=> 25 + T² -10T + 3T² = 75

=> 4T² - 10T - 50 = 0

=> 2T² - 5T - 25 = 0

=> 2T² - 10T + 5T - 25 = 0

=> 2T(T - 5) + 5(T -5) = 0

=> (2T + 5)(T - 5) = 0

=> T = 5   ( Taking only +ve Value of time)

After 5 Sec  speed would be √3 times that of the initial speed

EXPLANATION:

very IMPORTANT QUESTION

1– ELECTRICITY

2 CONDUCTOR

It is easier to push a heavy box when it fitted with WHEELS as it REDUCES the AMOUNT of friction APPLIED on wheels. .....

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HERE IS THE ANSWER

✔A HETEROGENEOUS mixture of INSOLUBLE particles of solute, spread throughout a SOLVENT is CALLED suspension .

Following are the properties of suspension

➡ The size of particles is more than 10 ^-5 CM in diameter .

➡The particles of suspension can be separated from solvent by the process of filtration

➡the particles of suspensions settle down, when the suspension is kept undisturbed .

➡A suspension is heterogeneous in nature .

➡More scattering takes place in suspensions because a bigger size of particles .

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9nine KGS of WOOD is NEEDED to GET ANSWER

This is the DEFINITION in my BOOK I HOPE it is CORRECT

So2n: 1s° 2s" 2p 3s 3p 4s 3d"
The QUANTUM NUMBER of the last electron of Zinc
which is located in the 48° ORBITAL are:
The PRINCIPAL Quantum Number n = 4
The Angular Momentum Quantum Number I = 0
The Magnetic Quantum Number m; = 0
The Electron Spin Quantum Number
1
1
me = +
or --
2
2

Self-excitation is made use of most often in DC GENERATORS When a self-excited generator is started, the initial current in the field WINDING is PRODUCED by the electromotive force (emf) induced in the armature winding by the residual magnetic field of the main POLES.

72 KM PER HOUR=(72×1000)÷3600=20∴(1`10+ 132)÷20=12.1

PLOT the given distances( in meters) on the y-axis and the time (in seconds) on the x-axis.

COORDINATES for the points to plot then become the intersecting points for the values.

For EG: the coordinates will be (0,0), (1,2) and so on.

The following TYPE of motion is non-uniform as after the graph is drawn we see that the motion itself isn't in a straight line. when a distance-time graph isn't in a straight line the motion is non-uniform. 

Which QUESTION have 2 SOLVE 19,20,21