All-in-One Exam Prep Platform

Explanation

The additive identity of a real number is zero (0).

This means that when you add zero to any real number, the result is the original number itself.

For example, 5 + 0 = 5, and -3 + 0 = -3. 

Explanation

Ascorbic acid, also known as vitamin C, is a water-soluble vitamin that is essential for various bodily functions, such as:

• Collagen production
• Wound healing
• Iron absorption
• Antioxidant functions

Vitamin C is one of the most well-known vitamins and is found in many fruits, vegetables, and other foods.

Explanation

The stratospheric ozone layer is Earth's “sunscreen”  protecting living things from too much ultraviolet radiation from the sun.

Oxygen layer in the atmosphere

Ozone protects us from the harmful ultraviolet radiation of the sun.

Ozone formula: O3

The ozone layer lies approximately 15-40 kilometers (10-25 miles) above the Earth's surface, in the stratosphere.

The ozone layer is depleting: Air pollution

ND17-7-2023

Explanation

"We tried to tide over our difficulties".

ہم نے اپنی مشکلات پر قابو پانے کی کوشش کی۔

It means to manage or overcome challenges temporarily until they are resolved.

Explanation

Magnetic flux linked (Φ) is proportional to the number of turns in the coil.

Doubling the number of turns doubles the total flux linked, assuming the magnetic field and area remain the same.

Explanation

Explanation

If |A| ≠ 0, then matrix A is Non-singular (also known as invertible).

Explanation

Explanation

Natural Number: The number 1 is considered a natural number (used for counting: 1, 2, 3, ...).

Explanation

When multiplying matrices A (order m × n) and B (order n × p), the resulting matrix has an order of m × p.