Explanation

The painting was stolen last month by them.

The sentence is in simple past tense (stole).

Passive voice of simple past is formed as:

was/were + past participle, hence:

was stolen.

Explanation

Explanation

For a leptokurtic distribution, β₂ > 3:

β₂ = μ₄ / μ₂² > 3

Given μ₂ = 3.5:

μ₄ / (3.5)² > 3

μ₄ > 3 × 12.25

μ₄ > 36.75

Explanation

Effective lesson planning includes content (what to teach), sequence (order of teaching), and time (duration).

These components ensure the lesson is organized, goal-oriented, and manageable.

Explanation

Activity method engages young learners through hands-on experiences and practical tasks.

It helps students appreciate and understand concepts better at the elementary level.

Explanation

Infrasonic sounds have frequencies below 20 Hz, which are too low for human hearing.

Ultrasonic refers to sounds above 20,000 Hz.

Audible is the range between 20 Hz and 20,000 Hz.

Explanation

The speed at a banked turn is given by:

v = √(rg tan(θ))

Given v = √(rg), we can equate:

√(rg tan(θ)) = √(rg)

This simplifies to:

tan(θ) = 1

θ = arctan(1) = 45°.

Explanation

When Thorium (Th) emits a beta particle (β⁻), a neutron converts into a proton, increasing atomic number by 1.

So Thorium (Z=90) becomes Protactinium (Z=91).

Explanation

Pest : Irksome → A pest is something that is irksome (annoying).

Expert : Proficient → An expert is someone who is proficient (skilled).

Explanation

A bimodal distribution has two modes, meaning two values occur with the highest and equal frequency.

It indicates the presence of two peaks in the data set.