Explanation

• Boyle’s Law describes the relationship between pressure and volume.
• At constant temperature, gas behaves in a specific way.
• Pressure increases when volume decreases.
• Pressure decreases when volume increases.
• Formula: P₁V₁ = P₂V₂

Explanation

• Bohr’s model states that electrons move in fixed energy levels (shells).
• These paths are also called orbits or stationary states.
• Each orbit has a definite energy.
• Electrons do not lose energy in these orbits.

Last verified on 12-04-2026

Explanation

• According to Charles’s Law, volume is directly proportional to temperature (in Kelvin).
• At constant pressure: V ∝ T.
• If temperature doubles, volume also doubles.
• Gas expands when heated.
• So, volume becomes double.

Last verified on 12-04-2026

Explanation

• Newton’s First Law is also called the Law of Inertia.
• A body remains at rest or in uniform motion.
• It continues unless an external unbalanced force acts on it.

Last verified on 12-04-2026

Explanation

20 years = 2 half-lives  

Fraction left = (1/2)² = 1/4  

Last verified on 12-04-2026

Explanation

For parallel: 1/R = 1/4 + 1/6 = 3/12 + 2/12 = 5/12  

R = 12/5 = 2.4 Ω  

Last verified on 12-04-2026

Explanation

To find the decimal equivalent of the binary number 1011:

(1 × 2³) + (0 × 2²) + (1 × 2¹) + (1 × 2⁰)

= (1 × 8) + (0 × 4) + (1 × 2) + (1 × 1)

= 8 + 0 + 2 + 1

= 11

Last verified on 12-04-2026

Explanation

Perpendicular vectors → R = √(3² + 4²) = √(9 + 16) = √25 = 5 N  

Last verified on 12-04-2026

Explanation

• An AND gate gives output 1 only when both inputs are 1.
• If any input is 0, output becomes 0.
• It follows the rule: 1 AND 1 = 1.

Last verified on 12-04-2026

Explanation

• Carbonated water contains carbon dioxide (CO₂) dissolved in water.
• The gas is dissolved under high pressure.
• It forms weak carbonic acid (H₂CO₃).
• This gives fizzy drinks their bubbles.
• So, it is carbon (CO₂) in water under high pressure.

Last verified on 12-04-2026