Explanation

Impoverished means غریب

Without money means پیسے کے بغیر

Explanation

"To" completes the phrase "to the best of his ability".

It means he worked with his maximum effort.

Explanation

In uniform circular motion, there is no angular acceleration (α = 0).

Since torque τ = Iα, and α = 0, torque is zero (τ = 0 Nm).

Explanation

Flammable : Burn → Something flammable is likely to burn.

Fragile : Break → Something fragile is likely to break.

Explanation

The correct preposition is "from" because it indicates being away or not present in a specific place, in this case, the class.

The phrase should read: "They were absent from the class."

Explanation

Sori are clusters of sporangia found on the underside of fern leaves (sporophylls).

They are responsible for producing and releasing spores for reproduction.

Explanation

Nascent hydrogen refers to atomic hydrogen (H), which is highly reactive and short-lived.

It is usually produced in situ during chemical reactions.

It is more reactive than molecular hydrogen (H₂).

Explanation

The Earth bulges at the equator and rotates, creating a centrifugal force that slightly reduces gravity there.

At the poles, this effect is minimal, so ‘g’ is stronger at the poles than at the equator.

Explanation

The sound level β (in dB) is given by:

β = 10 log(I / I₀)

where I₀ is the threshold intensity (faintest audible sound). Given I = I₀:

β = 10 log(1) = 0 dB

Explanation

Lactic acid fermentation occurs in skeletal muscles during intense exercise when oxygen is scarce, converting pyruvate to lactate.

It provides rapid but temporary energy, causing muscle fatigue.