Explanation

Shortwave radio operates in the high frequency (HF) band, typically between 3 MHz and 30 MHz.

The range 5.9 MHz to 26.1 MHz is commonly used for long-distance communication like international broadcasting.

Explanation

Fiber optics uses light to transmit data at high speeds through thin glass or plastic fibers.

It is mainly used in communication networks like internet, telephone, and cable TV.

Explanation

Let the smaller number be x.

The larger number is x + 2.

Given:

x² + (x + 2)² = 100

x² + x² + 4x + 4 = 100

2x² + 4x - 96 = 0

x² + 2x - 48 = 0

(x + 8)(x - 6) = 0

x = -8 or x = 6

If x = -8, larger number = -8 + 2 = -6

If x = 6, larger number = 6 + 2 = 8

Explanation

Given:

a - b = 7

ab = 6

The formula for a³ - b³ is:

a³ - b³ = (a - b)(a² + ab + b²)

= (a - b)((a - b)² + 3ab)

Substitute the values:

a³ - b³ = 7((7)² + 3(6))

= 7(49 + 18)

= 7 × 67

= 469

Explanation

In offers or polite suggestions, the word “something” is used (e.g., “to drink something”).

“Wouldn’t you like to drink something?” is grammatically and contextually correct.

Explanation

Temperature is continuous data because it can take any value within a range (e.g., 30.5°C, 30.55°C).

Continuous data can be measured on a scale, not just counted.

Explanation

The curriculum is the primary tool a teacher (the artist) uses to shape and guide students (the material) within the school (the studio).

It encompasses the planned content, objectives, and experiences designed to achieve educational ideals.

Explanation

"Cannot" is the correct modal verb expressing inability, matching the meaning of "not able to."

It is the most direct modal form equivalent to the original sentence.

Explanation

کتاب مونث ہے، اس لیے "کی" کا استعمال درست ہے۔

"اردو کا" یا "اردو کے" استعمال کرنا ترکیب کے لحاظ سے غلط ہوگا۔

Explanation

The human spine naturally has four curves: cervical, thoracic, lumbar, and sacral.

These curves, along with the intervertebral disks, help to absorb and distribute stress during movement and activities.