Explanation

Pressure P = F/A. The uncertainty in P is given by:

(ΔP/P) = (ΔF/F) + (ΔA/A)

Given ΔF/F = 2% and ΔA/A = 5%,

(ΔP/P) = 2% + 5% = 7%

Explanation

Rose is a dicot plant, meaning it has two seed leaves (cotyledons) in its seed.

Maize and Bamboo are monocots, having only one seed leaf.

Explanation

The number of different types of gametes is calculated using the formula 2ⁿ, where n is the number of heterozygous gene pairs.

In genotype AaBb, there are 2 heterozygous pairs (A/a and B/b), so 2² = 4 types of gametes: AB, Ab, aB, ab.

Explanation

Charge is quantized and exists in discrete amounts.

The smallest possible charge is that of a single electron or proton, which is 1.6 × 10−¹⁹C.

Explanation

When an object is placed at the principal focus (F) of a convex lens, the rays emerge parallel after refraction.

Parallel rays appear to meet at infinity, so the image is formed at infinity (very far away).

Explanation

Cohesion is the attractive force between molecules of the same substance.

It is strongest in solids due to tightly packed molecules.

Explanation

Given y = 2/x

Let's find the first and second derivatives:

dy/dx = -2/x²

d²y/dx² = 4/x³

Now, let's evaluate y + 1/2 * d²y/dx²:

y + 1/2 * d²y/dx² = 2/x + 1/2 * 4/x³

= 2/x + 2/x³

= (2x² + 2)/x³

= 2(x² + 1)/x³

= 2(1 + x²)/x³

Explanation

The prefix "re-" means again, which fits the sentence meaning: look at this chapter again.

So, "review" means to go over or examine something again.

Explanation

Stood means کھڑا

Sat means بیٹھا

Explanation

"Been" is the past participle used with "has" to form the present perfect tense ("has been caught").

It indicating the man's current state of being caught