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NORMALLY Trivalent and Pentavalent elements are used to DOPE Silicon and GERMANIUM. When an intrinsic semiconductor is doped with Trivalent IMPURITY it becomes a P-Type semiconductor. The P stands for Positive, which means the semiconductor is rich in holes or Positive charged ions.

The ANGLE between the direction of starvand tge direction of EARTH's AXIS of rotation is called CO -delication

SINCE viscosity is the measure of the FLUID's resistance to flow, so extra power or effort will be required to overcome that extra resistance caused by very HIGH viscous lubricant. Now, SUPPOSE you have a high speed BEARING, you can not use the same lubricant that you used for a low speed bearing.

Hi L am not SURE about the answer but STILL doing plz check it and say.


We know AVERAGE = total distance /total time


=> 18 + 25 +24 +48 +15/ 9+15+8 +12+7

=> 140/51 = 2.74 km/min

A LARGE rock, TYPICALLY one that has been worn SMOOTH by erosion.

When the FROG is out of the water, mucus glands in the skin KEEP the frog MOIST, which helps absorb DISSOLVED oxygen from the AIR. A frog may also breathe much like a human, by taking air in through their nostrils and down into their lungs.

In two-pole single-phase motors, the torque goes to zero at 100% SLIP (zero speed), so these require alterations to the STATOR such as shaded-poles to PROVIDE starting torque. A single phase INDUCTION motor requires separate starting circuitry to provide a rotating field to the motor.

Resonance) The Broughton SUSPENSION BRIDGE is known to follow the un-damped ODE system GIVEN by 500y" +50y F(t), when it is in use.

An apparatus CONSISTING of a vessel containing water, a freezing mixture in a tray surrounding the vessel, and thermometers inserted in the water at points above and below the freezing mixture; USED to show that the maximum density of water LIES at about 4°C.

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Let the car have a mass m and MOVE with a velocity V. Let the bus have a mass M and move with a velocity v. Then,

Momentum of the car = m V,

Momentum of the bus= M v

SINCE the two momenta are equal we have,

mV = M v = p ( p is magnitude of momentum)

Kinetic energy of the car = p²/2m,………1

Kinetic energy of the bus= p²/2M, … ….2

Comparing EQUATIONS 1 and 2,

Kinetic of the car › Kinetic energy of the bus ( as the kinetic energy of the vehicle is inversely proportional to the mass of the vehicle. A lighter vehicle has larger kinetic energy. Because to have the same momentum a lighter vehicle needs to travel MUCH faster. And since Kinetic energy is proportional to square of velocity its kinetic energy is more than of the HEAVIER vehicle).

It take the Earth approximately 23 hours 56 MINUTES 4.09 seconds to make one COMPLETE revolution 360°
so angular VELOCITY of Earth is about 7.292/100000 radian per sec

whereas a hope HAND of clock TAKES 12 hours to rotate 360°
so it's angular velocity is 1.5/10000 rad per sec

TERRESTRIAL Radiation. The Earth itself is a source of terrestrial radiation. RADIOACTIVE MATERIALS (including URANIUM, thorium, and radium) exist naturally in soil and ROCK. Essentially all air contains radon , which is responsible for most of the dose that Americans receive each year from natural background sources.

Vibratory motion can be DESCRIBED as any object moving/swinging back and forth, moving up and down, PULSATING, spinning, or vibrating. swinging; pendulums, swings, metronomes are the EXAMPLE of vibratory motion. Example: A BODY MOVES to and from about its mean (average) position is called vibratory motion.

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The RELATIVE density of a substance is DEFINED as the RATIO of the density of that substance to the density of water at 4oC. It is ALSO defined as the ratio of the MASS of substance to the mass of equal volume of water at 4oC. i.e., R.D. = Mass of the substance / mass of an equal volume of water at 4oC.

The Burj Khalifa, known as the Burj Dubai prior to its inauguration in 2010, is a skyscraper in Dubai, United ARAB Emirates. With a total height of 829.8 m and a roof height of 828 m, the Burj Khalifa has been the tallest structure and building in the world since its topping out in late 2008. Burj Khalifa's water system SUPPLIES an average of 946,000 LITRES of water a DAY. 

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According to properties of a magnet a magnet ALWAYS consists two poles north pole and south pole even after braking it again and again and we can prove it by EXPERIMENTS. we know that the magnetic field lines EMERGES from north to south pole





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but I didn't understood your question properly

The HARDER we beat the drum the louder the SOUND is produced because it is due to MAXIMUM wavelength and minimum FREQUENCY.

If TWO objects are moving in parallel their relative VELOCITY can be calculated. For example, two cars are moving in the same direction ALONG a ROAD. Car A is travelling at +30 m/s and Car B is travelling at +20 m/s. Their relative velocity is 30 – 20 = +10 m/s.

What is the value of G at the centre of Earth?

G represents the ‘gravitational constant’, which is approximately

6.674×10−11N.kg−2m2

G has the same value at the centre of the Earth as it does on the tip of my nose, the surface of Jupiter, a point 533 light-years away in any direction you care to choose or anywhere else in the Universe.

Whereas g is the acceleration due to gravity at sea-level on the surface of the Earth. This is approximately

9.8ms−2

Perhaps what you are really interested in is the acceleration due to gravity towards the centre of the Earth as we move through the Earth towards the centre?

From Newton’s Law of Universal Gravitation, the force, F, acting between two objects is given by:

F=Gm1m2r2 [Eq.1]

where m1 and m2 are their respective masses and r is the distance between the centres of the two masses and G is, of course, the gravitational constant.

From Newton’s Second Law of Motion, Force=Mass×Acceleration, thus:

Acceleration=ForceMass

Combining this with Eq.1, the acceleration on object 2 (which has mass m2) is therefore:

Gm1m2m2r2=Gm1r2 [Eq.2]

From the , when calculating the force acting on an object that is a distance r from the centre of a sphere of radius R>r, one can safely ignore the effect of the mass of that part of the sphere that is further from its centre than r.

So, if object 1 is the Earth, the force acting on object 2 at a point r from the centre of the Earth would be:

Gmrr2

where mr is the mass of that part of the Earth that is no more than r from the centre of the Earth.

If the Earth was a sphere of uniform density ρ, then:

mr=43πρr3

Substituting this into Eq.2, we can express the acceleration as:

43πρr3×Gr2=43πρGr

So, the acceleration would be proportional to the distance from the centre of the Earth. At a point half-way to the centre, r=0.5R, so the acceleration is 0.5g; at a point nine-tenths of the way to the centre of the Earth, r=0.1R, so the acceleration is 0.1g; and at the centre, r=0, so the acceleration is 0.

Of course, the Earth isn’t a sphere (its close); more importantly, it isn’t of uniform density.

The ‘average’ density of the Earth’s crust is around 3 tonnes per cubic metre, the mantle ranges from 3.3 to 5.7 tonnes per cubic metre (INCREASING with depth) and the core ranges from 10 to 13 tonnes (again increasing with depth).

While the acceleration still decreases to zero, it is no longer a linear decrease. In fact, as you will see from the graph below, the acceleration is actually higher near the bottom of the mantle than it is at the surface!

PULSE RATE in 1 min.=90 BEATS

You can USE PARALLEL CONECTION to PERFORM what you SAID

Here ,
v=126 KM /H
=126 x 1000 m/60min
= 126000m/60min
= 12600m/6 min
=2100m/ min
Now,
DISTANCE covered in 1 min is 2100m
therefore distance covered in 40 mins
=40 x 2100 m
=84000m
hope it's the required answer...

. Inertia, property of a BODY by virtue of which it opposes any AGENCY that attempts to put it in motion or, if it is moving, to change the magnitude or direction of its velocity.Inertia is a passive property and does not enable a body to do anything except oppose such active AGENTS as FORCES and torques
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It can be DONE in two ways.

Given BUCKET of water = 50 kg, depth = 10 m, mass = 1 kg/ m

Weight of bucket = 50 x 9.8 x 10 (work done in lifting)

          = 4900 J

Mass of rope 10 x 1 kg = 10 kg and wt of rope = 10 x 9.8 = 98 N

Work done in raising the bucket  = 98 x 10 = 980 J

Total work done = 4900 + 980 = 5880 J

OR

Mass = 1 x L kg

Since depth of well is 10 m L = 10 m

 So mass = 1 x 10 = 10 kg

Mass of water raised M = 50 kg

Work done in raising + bucket filled water

  W = (mass of rope + mass of water raised) x g x height

W = (10 + 50)(9.8)(10)

W = 5880 J

Weather glass was an instrument which was PROPOSED as method for predicting weather.It CONSIST of a special liquid placed INSIDE a sealed transparent glass.The state of liquid was believed to be related to the weather......!

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Hot AIR is less dense than cool air; the heated air causes the balloon to RISE simply because it is LIGHTER than an equal volume of cold air. Buoyancy is an upward force that the air exerts, and it HELPS hot-air BALLOONS and blimps stay in the air. A hot air balloon uses a burner to heat up the air inside the balloon.

Does this help? The horizontal COMPONENT of earth's MAGNETIC field, BH, is the PROJECTION of earth's magnetic field. on surface of the earth. Earth's magnetic field varies with longitude and latitude. HOPE this helps you out mate! :) please mark as branliest and hit that thanks button! :)

The top SURFACE must have more FRICTION so that the rider doesn’t fall.

The BOTTOM surface should have low friction so that the board can GLIDE on the water flawlessly.

Hope it Helps

LIGHT TRAVELS in TRANSVERSAL WAVES.

Sound travels in LONGITUDINAL waves.

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