Explanation

Explanation

The first law of reflection states that the angle of incidence = angle of reflection.

Both rays and the normal lie in the same plane.

Explanation

Let the money Bilal has = x

Then Ahmed has = x + 20

Together they have:

x + (x + 20) = 150

→ 2x + 20 = 150

→ 2x = 130

→ x = 65

Bilal has 65 PKR.

Explanation

A Table is a collection of related records in a database.

It organizes data into rows and columns, where each row represents a record, and each column represents a field or attribute.

Unlike a file, which is a collection of data without any inherent structure, a table in a database is designed to store structured and related information.

A table is a fundamental component of a relational database, providing a systematic way to organize and manage data.

Explanation

5/2 is a real number (a rational number), as it can be written as a finite decimal (2.5).

Explanation

Loga (m × n) = Loga m + Loga n.

This is a logarithmic property: the log of a product is the sum of the logs.

Explanation

In the client/server model, one computer (server) provides services or resources to another (client).

This is a common architecture in networks and distributed systems.

Explanation

The Recycle Bin temporarily stores deleted files so users can restore them if needed.

It acts as a safety net before permanent deletion.

Explanation

The charges of Proton, Electron, Neutron respectively are:

• Proton: Positive charge (+1)
• Electron: Negative charge (-1)
• Neutron: Neutral charge (0)

Explanation

Let's find the square numbers between 63 and 143:

8² = 64 (since 8² = 64 > 63)

9² = 81

10² = 100

11² = 121

The next square number would be 12² = 144, which is greater than 143, so we stop at 11².

Now, let's calculate the sum:

64 + 81 + 100 + 121 = 366