Explanation

The phrase means someone seems odd or chaotic but actually has a logical plan.

It's used to show that their unusual actions have purpose and direction.

Explanation

L = length, W = width

Perimeter = 2(L + W) = 34 cm

If length increases by 2.5 cm:

New perimeter = 2(L + 2.5 + W)

= 2L + 5 + 2W

= 2(L + W) + 5

= 34 + 5

= 39 cm

Difference in perimeter = 39 - 34 = 5 cm

Explanation

Given equation: x^2 - 3kx + 4k^2 = 0.

Sum of roots = 3k, Product of roots = 4k^2.

Sum of squares of roots = (sum of roots)^2 - 2(product of roots)

= (3k)^2 - 2(4k^2)

= 9k^2 - 8k^2

= k^2.

Given sum of squares = one of the options.

If sum of squares = 1, then k^2 = 1, so k = ±1

Explanation

Alkali metals (like sodium and potassium) react vigorously with air and water, often catching fire.

To prevent this, they are stored in oil (like paraffin oil) to keep them stable and unreactive.

Explanation

Crossing over occurs during meiosis, where genetic material is exchanged between homologous chromosomes.

This process produces recombinant chromatids, which carry a new combination of genes.

Explanation

Polar orbiting satellites travel over the Earth from pole to pole and are mainly used for collecting weather and climate data.

They provide detailed global coverage, useful for forecasting and environmental monitoring.

Explanation

The bubble tube set at a 45° angle is used to check inclined or sloped surfaces.

It helps ensure surfaces are accurately angled.

Explanation

A fuse melts quickly when current exceeds safe limits due to its low melting point.

This breaks the circuit and prevents damage to appliances or wiring.

Explanation

The denotative meaning is the literal, dictionary definition.

"Congested" literally means filled to excess or overcrowded, especially in traffic or spaces.

Congested means ضرورت سے زیادہ یا بھیڑ بھرا ہوا

Explanation

Conflict is the main problem or challenge in a story or fable.

It drives the characters to take action and find a solution.