Explanation

A thermistor is a type of resistor whose resistance changes significantly with temperature.

Explanation

 Blood pressure must be higher than atmospheric pressure to ensure continuous blood flow throughout the body.

Explanation

 The center of Newton's rings is dark due to destructive interference.

This occurs because the air film between the lens and the glass plate is thinnest at the point of contact.

At this point, the two reflected light waves are out of phase, leading to their cancellation and the formation of a dark spot. 

Explanation

Resistivity is a measure of how strongly a material opposes the flow of electric current.

Here's a general classification based on resistivity (in Ω-cm):

$10^5$ and 10 ^9 Ω-cm, it is classified as an insulator because it resists the flow of electric current very strongly.

Explanation

Superconductivity is a phenomenon of exactly zero electrical resistance and expulsion of magnetic fields occurring in certain materials when cooled below a characteristic critical temperature.

This allows for highly efficient electrical conduction and magnetic field exclusion.

Explanation

Head is covered with hair.

سر بالوں سے ڈھکا ہوا ہے۔

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We use "covered with" when talking about the material or substance that lies on top of or surrounds something.

Pattern: be covered with + substance/material

Explanation

Couch, Table and Chair are furniture.

Whereas a rug is a fabric used as a floor covering. Hence, the correct answer is "Rug".

ND18-9-2023

Explanation

The total time of flight (T) for a projectile is given by:

T = 2v₀sin(θ) / g

The maximum height (H) is:

H = (v₀sin(θ))² / (2g)

Using T = 2v₀sin(θ) / g, we can express v₀sin(θ) = gT/2. Substituting this into the height equation gives:

H = (gT/2)² / (2g) = g²T² / 8g = gT² / 8

Explanation

One kilometer is equal to 1000 meters.

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The term “kilo-” in “kilometer” is a prefix in the metric system that means “thousand.”

So, when we say “kilometer,” it means a 1000 meters. 

Explanation