Explanation

The wavelength of the audible frequency (20 Hz to 20 kHz) audible to the human ear is approximately 17 m to 17 mm.

Bats use slightly higher frequencies, so they can solve targets smaller than 17mm.

The wavelength of audible sound is much longer than the wavelength of visible light.

Explanation

Gomal Pass connects Ghazni in Afghanistan with Tank and Dera Ismail Khan in Pakistan.

The Gumal Pass is actually a 4-mile (6-km) defile (gorge), but the name is sometimes applied to the full course of the Gumal River.

Explanation

Former Prime Minister Imran Khan addressed the High-Level segment of the ongoing 76th session of the UN General Assembly (UNGA) on 25 September 2021

UN general assembly: The UN General Assembly (UNGA) is the main policy-making organ of the Organization.

ND12_8_2023

Explanation

Hue means رنگت یا صورت 

Colour means: رنگ

Explanation

Here next week indicates future. 

This sentence belongs to Future Perfect Tense.

Have + third form of a verb is used in this tense. 

By next week we shall have completed the course. 

اگلے ہفتے تک ہم کورس مکمل کر لیں گے۔

agm.5.3.23

Explanation

Know about NATO

NATO full form: North Atlantic Treaty Organization

Founded: 4 April, 1949 (Washington, USA)

Headquarters: Brussels, Belgium

Total members: 31 (29 European & 2 North American countries)

Latest Member: Finland

Type: Military Alliance

Official Languages: English & French

Founding members: 12

Macedonia joined NATO: 27, March 2020

Pakistan: Not a NATO member

Member Muslim country: Turkiye  

On 4 April 2023, Finland became 31st member on 74th anniversary of NATO.

List of NATO member countries

1.       Albania

2.       Belgium

3.       Bulgaria

4.       Canada

5.       Croatia

6.       Czechia

7.       Denmark

8.       Estonia

9.       France

10.   Germany

11.   Greece

12.   Hungary

13.   Iceland

14.   Italy

15.   Latvia

16.   Lithuania

17.   Luxembourg

18.   Montenegro

19.   Netherlands

20.   North Macedonia

21.   Norway

22.   Poland

23.   Portugal

24.   Romania

25.   Slovakia

26.   Slovenia

27.   Spain

28.   Turkiye

29.   United Kingdom

30.   United States

31.   Finland

Explanation

wheedle means: چکر لگانا

deceive meaning: دھوکہ دینا

Explanation

The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium.

Explanation

Arrogant means مغرور، تکبر یا گھمنڈی

Explanation

EXIGENT means فوری

URGENT means فوری