Explanation

• Nitrogen (N2) makes up about 78% of the Earth's atmosphere.
• Making it the most abundant gas in the atmosphere.
• It is followed by oxygen (~21%), with other gases in much smaller amounts.

Explanation

An employee of the bank stole the money.

The original sentence is in past simple passive ("was stolen").

In active voice, it becomes past simple active: "stole the money."

Explanation

A new phone has been gifted by my father on my birthday.

Present perfect passive: has/have + been + past participle.

Object "a new phone" becomes the subject in the passive form.

Explanation

A letter was being written to him by me.

Past continuous passive: was/were + being + past participle.

"I was writing" → "was being written" with the object "a letter" as the new subject.

Explanation

The days of summer in the northern areas are liked by me.

Present simple passive: am/is/are + past participle.

"I like" → "are liked by me" because "days" is plural.

Explanation

He was elected Mayor by the people.

In passive voice, the object "him" becomes the subject "he."

The rest of the sentence follows the structure: Subject + was + past participle + by + agent.

Explanation

The three standard equations of motion are:

v = u + at

This is the first equation of motion, relating final velocity to initial velocity, acceleration, and time

s = ut + (1/2)at²

This is the second equation of motion, relating displacement to initial velocity, acceleration, and time

v² = u² + 2as

This is the third equation of motion, relating final velocity to initial velocity, acceleration, and displacement

Where:

v = final velocity

u = initial velocity

a = acceleration

t = time

s = displacement.

These equations are used in kinematics, which is the study of motion.

They are applicable when dealing with constant acceleration and motion in a straight line. 

Explanation

A printer is an output device that transfers digital information from a computer onto a physical medium, most commonly paper. 

Scanner:

Used to digitize physical documents or images, converting them into digital data.

Monitor:

An output device that displays visual information from a computer, but it does not produce physical copies on paper.

Keyboard:

An input device used to enter text and commands into a computer. 

Explanation

Assassination means قتل

Explanation

He is going to the market

We use "is" here because:

Subject–verb agreement

The subject "He" is a third-person singular pronoun.

In the present continuous tense (am/is/are + verb-ing), the rule is:

I → am

He/She/It → is

We/You/They → are