Explanation

1. Simplex: Data flows in one direction only (e.g., keyboard to computer).
2. Half-Duplex: Data can flow both ways, but not at the same time (e.g., walkie-talkies).
3. Full-Duplex: Data flows both ways simultaneously (e.g., telephone conversations).

Explanation

Force is defined as the rate of change of linear momentum with respect to time.

According to Newton’s second law, force causes a change in an object’s momentum.

Explanation

The given solution is already solved:

5x + 8 = 23

5x = 23 - 8

5x = 15

x = 15/5

x = 3

Explanation

F ∝ m1m2

If both masses are doubled, F' ∝ (2m1)(2m2) = 4m1m2

So, F' is 4 times F.

Explanation

To find g(3), substitute t = 3 into the equation:

g(3) = (3)³ + (3)² - 9(3) - 9

= 27 + 9 - 27 - 9

= 0

Explanation

Improve means بہتر بنائیں

Refine means بہتر کریں

Explanation

Nickel is a micronutrient essential for the activity of the enzyme urease, involved in nitrogen metabolism.

It helps in converting urea into usable forms of nitrogen for plants.

Explanation

Carboxylic acids contain the carboxyl group (–COOH), which gives them their acidic properties.

This group consists of a carbonyl (C=O) and hydroxyl (–OH) bonded to the same carbon atom.

Explanation

Calcium oxalate accounts for ~70% of kidney stones, forming crystals when urine is concentrated.

It results from high oxalate intake (e.g., spinach, nuts) or metabolic imbalances.

Explanation

60% of 50 = 60/100 × 50

= 0.6 × 50

= 30