Explanation

A single chlorine atom from CFCs can destroy up to 100,000 ozone molecules before being deactivated.

This chain reaction is what makes chlorine so dangerous for the ozone layer.

Explanation

First, let's find the work rate of 10 men:

10 men construct 75 km in 5 days, so:

Work rate = 75 km / 5 days = 15 km/day for 10 men

Now, let's find the work rate for 15 men:

Work rate for 15 men = (15/10) × 15 km/day = 22.5 km/day

Now, let's find the time needed for 15 men to construct 45 km:

Time = Distance / Work rate

= 45 km / 22.5 km/day

= 2 days

Explanation

The first recorded Pashto poem is attributed to Amir Kror Suri.

It is thought to have been written in the 8th century CE (2nd Hijri century).

Explanation

Explanation

A dilute solution contains a relatively small amount of solute compared to the solvent.

This means the solute is less concentrated in the solution.

Explanation

Software piracy is the illegal copying, distribution, or use of software without proper licensing.

It especially refers to unauthorized commercial resale or use of software for profit.

Explanation

Expansion slots like AGP (Accelerated Graphics Port), PCI (Peripheral Component Interconnect), and ISA (Industry Standard Architecture) are used to add extra hardware (graphics cards, sound cards, etc.) to a computer.

These slots enhance the computer’s capabilities by allowing external components to be connected directly to the motherboard.

Explanation

Data acquisition refers to the process of collecting data, not a primary objective of a database.

The main objectives of a database include Data Independence, Data Integration, and Data Integrity, which focus on organizing, managing, and ensuring the accuracy of data.

Explanation

Empty set is, in fact, a subset of every set, including itself, because the definition of a subset allows the empty set to be considered a subset of any set.

The intersection of the empty set with any set is always the empty set, making statements about it true.

Explanation

Given b^n = b^m, for b ≠ 0:

Step 1: Analyze the equation

If b^n = b^m, then n = m, or b = 1 or b = -1 with specific conditions on n and m.

Step 2: Consider the case when b ≠ 1 and b ≠ -1

For b ≠ 0, 1, or -1, the equation holds true when n = m.

Step 3: Look for an option that satisfies n = m

Among the given options, one possible solution where n = m is when both n and m are 0, since any non-zero number to the power of 0 is 1.

The answer is: m = 0 and n = 0.