Explanation

A good teacher should understand the student's situation before taking any action.

This approach helps in building trust and addressing any genuine issues causing the delay.

Explanation

The correct choice is "is watching" because it follows the present continuous tense, which is used to describe actions happening right now.

"She is watching the TV" indicates that the action is currently ongoing.

Explanation

Personification gives human actions to non-human things — here, the story is described as if it could jump.

Non-living things like a story cannot physically jump, which makes this an example of personification.

Explanation

Hibiscus rosa-sinensis (China rose) is a flowering plant of the Malvaceae family.

This family is known for its characteristic funnel-shaped flowers and mucilaginous properties.

Explanation

Activation energy is the minimum energy needed to start a chemical reaction by breaking bonds in reactants.

It determines reaction rates (lower = faster).

Explanation

Elements like Cr (24), Cu (29), and Mo (42) show irregular configurations due to extra stability of half-filled or fully filled d-orbitals.

Examples:

• Cr: [Ar] 3d⁵ 4s¹
• Cu: [Ar] 3d¹⁰ 4s¹
• Mo: [Kr] 4d⁵ 5s¹

Explanation

The cochlea is a spiral, snail-shaped structure in the inner ear responsible for converting sound vibrations into nerve signals.

It plays a key role in the sense of hearing.

Explanation

To find the equilibrium constant (Kc) for the reaction H₂ (g) + I₂ (g) ⇌ 2HI (g), we use the formula:

Kc = [HI]² / [H₂] [I₂]

Given concentrations:

[HI] = 0.08 mol/dm³

[H₂] = 0.04 mol/dm³

[I₂] = 0.04 mol/dm³

Kc = (0.08)² / (0.04 × 0.04)

= 0.0064 / 0.0016

= 4

Explanation

Spring potential energy is given by U = 1/2kx².

If stretching to distance S gives 10 J, then to stretch to 2S, the energy becomes 1/2k(2S)² = 4×10 = 40 J.

So, additional work =  40−10 = 30 J.

Explanation

The phrase "washing my face" uses the correct possessive form "my."

The article "the" is necessary before "mirror" to make the sentence grammatically correct.