Explanation

Now means موجودہ وقت تک

Then means پچھلے وقت تک

Explanation

Sodium is a metal, and metallic bonding involves positive ions in a lattice surrounded by a sea of free (delocalized) electrons.

This structure gives metals properties like electrical conductivity and malleability.

Explanation

Using the formula for parallel resistance: 1/R_eq = 1/R1 + 1/R2

1/24 = 1/40 + 1/R

Solving for R gives R = 60Ω.

Explanation

Problem Identification is the first step in the problem-solving process where the issue is clearly recognized and defined.

Without identifying the actual problem, no effective solution can be planned or executed.

Explanation

Concerned means کسی چیز کے بارے میں پریشان یا پریشان ہونا

Carefree means پریشانی یا تشویش کے بغیر

Explanation

BODMAS stands for: Brackets, Orders (powers/roots), Division, Multiplication, Addition, Subtraction.

Operations must be performed in this order to solve expressions correctly.

Explanation

مناظر، "منظر" کی جمع ہے، جس کا مطلب ہوتا ہے دیکھنے کے قابل منظر یا منظرنامہ۔

یہ لفظ عام طور پر خوبصورت یا قابلِ مشاہدہ مناظروں کے لیے استعمال ہوتا ہے۔

Explanation

Navigation means بحری سفر

Explanation

³√27 = ³√(3 × 3 × 3)

= ³√(3³)

= 3

Explanation

"Under" is used to show position below something.

Here, the old man is positioned below the tree, so "under" fits correctly.