Explanation

Steam causes more severe burns than boiling water because it carries latent heat of vaporization.

It releases extra energy when it condenses on the skin.

Explanation

Dental amalgam is a mixture of liquid mercury in solid metal alloys like silver, tin, and copper.

It forms a solid solution once set, where the liquid (mercury) is dispersed in the solid.

Explanation

Explanation

In this sentence, the structure requires the present tense because the statement is a general truth.

The word "becomes" is the correct form.

Explanation

In group learning, students often expect recognition and validation from peers for their contributions.

This appreciation boosts confidence and encourages active participation.

Explanation

Passive voice of "I am writing a letter" is formed as:

Object + is/are being + past participle + by + subject

So, "A letter is being written by me" is correct.

Explanation

Encouraging students can help them stay motivated and committed to completing their education.

Positive reinforcement, support, and creating a sense of achievement can reduce drop-out rates effectively.

Explanation

• Failure is the state or condition of not meeting a desirable aim and may be viewed as the opposite of success.
• There are many cognitive, physical, intellectual, scholastical, emotional, and cultural causes for the failure of students.
• When the students become failed, it can be understood that the system has failed.
  

Explanation

Passive voice of "Someone has broken your pen" is formed as:

Object + has/have been + past participle + by + subject

So, "Your pen has been broken by someone" is grammatically correct.

Explanation

Factors of 4 = 1, 2, 4

Factors of 6 = 1, 2, 3, 6

Factors of 8 = 1, 2, 4, 8

Highest Common Factor (H.C.F) = 2 (common to all three numbers)