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acc to formula x/y=(45/100)-(45/40)

sleeping

It helps them because if they have large cornea & pupil then during night large amount of light can enter through them so they can see property in nights.

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Eyes of nocturnal animals like owl has large cornea and a large pupil , these features increase their field of vision and an increase retinal surface and help them to collect more ambient light during night.

A Zener diode is a type of diode that allows current to flow not only from its anode to its cathode, but also in the reverse direction, when the Zener voltage is reached. Zener diodes have a highly doped p–n junction.

zener diodes have a highly doped p_n junction

zener diodes have a highly doped p. n junction

it is haviely doped therefore it works in reverse bise

zener diode works in reverse bise

zener diode is haviely doped therefore it works in reverse bise

Azener diodeis a uniquediodethat allows current to flow in the forward direction in the same manner as an idealdiode, but will also permit it to flow in the reverse direction when thevoltageis above a certain value known as the breakdownvoltage, "zener knee voltage" or "zener voltage

The resistor value is 167 ohm.

Solution:

The load current when regulated perfectly must have value of series resistance as R in order that the Zener diode has larger current flow than load current.

The value of series resistance is calculated as follows,

Given: Zener Voltage, = 6 V

= 4 m A

Unregulated input = 10A

Now the total current is given by,

I = 20 + 4 = 24 m A

Voltage drop across the series resistance = Unregulated – Regulated

V = 10 – 6

V = 4 v

Therefore, series resistance R = 167 ohm.

(C)Acceleration of the block Cis4m/s2.

The specialshapegiven to the bodies moving in the fluids like ships in water andaeroplanesin the air toreducethe fluidfrictionis called streamlinedshape. .Frictionslows theairplanedown and causes it to consume more fuel, soreducing frictionis important.

Heavy doping makes the depletion region very thin. This makes the electric field of the junction very high, even for a small reverse bias voltage. This in turn helps the Zener diode to act as a ‘voltage regulator

The streamlined shape is given to ships in water and aeroplanes in the air to reduce the fluid friction.The special shape given to the bodies moving in the fluids like ships in water and aeroplanes in the air to reduce the fluid friction is called streamlined shape.

Most applications of X rays are based on their ability to pass through matter.

This ability varies with different substances; e.g., wood and flesh are easily penetrated, but denser substances such as lead and bone are more opaque.

The penetrating power of X rays also depends on their energy.

The more penetrating X rays, known as hard X rays, are of higher frequency and are thus more energetic, while the less penetrating X rays, called soft X rays, have lower energies

X rays that have passed through a body provide a visual image of its interior structure when they strike a photographic plate or a fluorescent screen; the darkness of the shadows produced on the plate or screen depends on the relative opacity of different parts of the body.

Respirationis the biochemicalprocessin which the cells of an organism obtain energy by combining oxygen and glucose, resulting in the release of carbon dioxide, water, and ATP (the currency of energy in cells).

I+r/2=2+1/2=1.5 is the correct answer

describe bhai

Ans :- In physics,torqueis the tendency of a force to turn or twist.The force applied to a lever, multiplied by the distance from the lever's fulcrum, multiplied again by the sine of the angle created, is described astorque. This is also known as "r cross f," or "force times fulcrum distance times sine theta

Theoptical fiberis electrically non-conductive, so it does not act as an antenna topickup electromagnetic signals.Informationtraveling inside theoptical fiberis immune to electromagnetic interference, even electromagnetic pulses generated by nuclear device

Angular momentum is constant or conserved when the net torque is zero.

(d) is correct option

located in the nose it is the answer

A geostationary satellite, is a satellite that revolves in the same direction the earth rotates.There cannot be geostationary satellite at the poles, because, it would have to be at rest, which cannot happen as it would get pulled by the earth’s gravity and eventually crash to the earth’s surface.In fact, there can not be geo stationary satellite anywhere else, except above the equator.

Hereit will be 230/150*25and 180-(100<0)-(50)50<30

Anartificial magnetis a magnetized piece of iron , steel . cobalt or nickel.Thesemagnetsare of different sizes and shapes. Reasons behind makingartificial magnets: 1.Artificial magnetsare used in various applications in day to day life like loudspeaker,telephones,radios, television etc

(i)Artificial magnetsare made in differentshapessuch as barmagnets, horse-shoemagnets, and cylindricalmagnets. (ii) Materials which are attracted towardsmagnetsare calledmagneticmaterials.

The retina has optic nerve through which the message or the image travel to the brain.

Because of very low friction

In audio signal processing and acoustics, echo is a reflection of sound that arrives at the listener with a delay after the direct sound.

A voluntarymusclesusually works across a joint. It is attached to boththebones on either side ofthejoint by strong cords called tendons. A tendon is a tough band of connective tissue that connects amuscleto a bone.

par question mein 40 degrees hai

As more turns so more flux per coil will be there so it will be more than a single turn

thanks for solving my problem

what is R and R1 here ?

light year is a unit of distance

luminosity is the right answer

luminosity is the right answer

luminosity is the right answer

Lumininosity is the right answer

light-year is a unitof distance.

Light Year is the unit of (Time) hope this will help you like my answer

light is unit of distance for measurind distance of asteroid

light year unit of distance

1light year is the distance travelled by light in one year.1ly=9.467×10^15

light year is a unit of distance which is used to find the distance between 2 planets

luminosity is a unit of light year