Explanation

In solar furnaces, concave mirrors are used for converging the sun's rays.

concept:

Concave mirrors reflect and focus incoming light rays (parallel) at a point, called the focus point.

Depending on the distance of an object from the reflecting surface, different types of images are formed.

Explanation

Sparked by the arrest of Rosa Parks on 1 December 1955,

the Montgomery bus boycott was a 13-month mass protest that ended with the U.S. Supreme Court ruling that segregation on public buses is unconstitutional.

Date: December 5, 1955 – December 20, 1956 

Explanation

on 15 August 2021, the Taliban entered Afghanistan's capital city of Kabul, and took control of the country.

Over the past 12 months, human rights violations against women and girls have mounted steadily.

Explanation

Average= sum of numbers/total numbers 

Average = [70%+77%+78%+82%+85%]/5

Average-= 392/5

Average=78%

Explanation

The average length of pregnancy is 9 months 240 days and 40 weeks.

**

concept

Pregnancy is counted from the first day of your last menstrual period.

This means an extra 2 weeks are counted at the beginning of your pregnancy when you aren't actually pregnant.

So pregnancy lasts 10 months (40 weeks)

—not 9 months—because of these extra weeks.

Explanation

Morphology in linguists deals with the Study of the formation of words.

The term was first used in linguistics by August Schleicher in 1859

while

 Morphology in Biology  Study of the form and structure of animals and plants. 

Explanation

Carbon Microphone is a type of microphone, a transducer that converts sound to an electrical audio signal.

Explanation

Kingdom Protista includes all eukaryotes that are not animals, plants, or fungi.

Kingdom Protista is very diverse.

It consists of both single-celled and multicellular organisms.

ND6-08-2023

Explanation

We do not allow people to smoke in the kitchen.

the above sentence is a "simple sentence" and does not require any helping word 

"To smoke" is best to keep the meaning of the original sentence

Explanation

incorrect: She has been flying kite from two hours 

correct: She has been flying kite for two hours

This is a sentence of Present Perfect Continuous Tense.

Formula: Subject + has/have + been + verb + ing + object