Explanation

The question "How often do you go to the gym?" asks about frequency.

The answer "Twice a week" correctly matches this type of question.

Explanation

√2 cannot be written as a ratio of two integers, so it is an irrational number.

Its decimal form is non-terminating and non-repeating (≈ 1.414...).

Explanation

Disjoint sets have no elements in common.

Therefore, their intersection is the null set (∅).

Explanation

A stone thrown from a height follows a projectile motion, which traces a parabolic path under gravity.

This occurs due to the combination of constant horizontal velocity and accelerated vertical motion.

Explanation

The subject "The quality" is singular, so it should take "is" instead of "are."

Correct sentence: "The quality of these goods is well known."

Explanation

Active transport moves molecules against the concentration gradient, which requires energy (ATP).

Passive transport and facilitated (not vacillated) transport do not require energy.

Explanation

Ball falls 20m, so time taken is found using:

s = 1/2 gt²

20 = 1/2 × 10 × t²

t = 2s

Vertical velocity when it hits the ground:

v_y = gt = 10 × 2 = 20 m/s

Since it hits at 45°, v_x = v_y = 20 m/s

Explanation

Let's compare the fractions to 0.5:

1/2 = 0.5 (exact match)

Explanation

The pattern in the sequence appears to be obtained by dividing the previous term by 3:

27 ÷ 3 = 9

9 ÷ 3 = 3

3 ÷ 3 = 1

Explanation

Benzene is more volatile because it has a low boiling point and evaporates quickly at room temperature.

Volatility refers to a liquid's tendency to vaporize — benzene does so more readily than the others listed.