Explanation

• “Fast” is an adverb in this sentence because it describes how he runs.
• It modifies the verb “runs.”
• Adverbs explain manner, place, time, or degree.
• Here it shows the manner of action (how he runs).

Last verified on 08-06-2026

Explanation

• He is good at mathematics.
• وہ ریاضی میں اچھا ہے۔
• The adjective “good” commonly takes the preposition “at.”
• Good at is used to show skill or ability in a subject or activity.

Last verified on 11-05-2026

Explanation

Explanation

• Pressure can be defined as the force acting per unit area.
•  Pascal (Pa) is the SI unit of pressure.
• In SI base units kg⋅m−1⋅s−2
• Derivations from other quantities: p = F / A
• Dimension unit: M L^−1 T^-2

Additional information 

The SI unit of energy/work is the joule (J)

Last updated on 09-03-2026

Explanation

Explanation

Force is defined by Newton’s Second Law:

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1. Length – [L]  

2. Mass – [M]  

3. Time – [T]  

4. Speed/Velocity – [LT⁻¹]  

5. Acceleration – [LT⁻²]  

6. Force – [MLT⁻²]  

7. Work/Energy – [ML²T⁻²]  

8. Power – [ML²T⁻³]  

9. Pressure – [ML⁻¹T⁻²]  

10. Density – [ML⁻³]  

11. Momentum – [MLT⁻¹]  

12. Impulse – [MLT⁻¹]  

13. Gravitational constant (G) – [M⁻¹L³T⁻²]  

14. Planck’s constant (h) – [ML²T⁻¹]  

15. Charge – [TI] (T = time, I = current)  

16. Potential difference (Voltage) – [ML²T⁻³A⁻¹]  

17. Electric current – [I]  

18. Electric resistance – [ML²T⁻³A⁻²]  

19. Capacitance – [M⁻¹L⁻²T⁴A²]  

20. Magnetic field (B) – [MT⁻²A⁻¹]

Explanation

Bewildered means پریشان

Confused means پریشان

Explanation

The first law of thermodynamics is given as ΔE=q+w,

where ΔE is the change in internal energy of a system,

q is the net heat transfer (the sum of all heat transfer into and out of the system),

and w is the net work done (the sum of all work done on or by the system).

Explanation

Angular momentum = Moment of Inertia × Angular Velocity  

 Moment of Inertia = Mass × (Length)² → [M L²]  

- Angular Velocity = [T⁻¹]

= [M L²] × [T⁻¹] = [M L² T⁻¹]

.....

The dimensional formula of momentum is:[M L T⁻¹]

Explanation

The value of eccentricity of a circle is 0.

This is because a circle is a special case of an ellipse where the two foci coincide at the single center point, resulting in a zero distance between the foci

As a measure of how much a shape deviates from a perfect circle, a circle, by its very nature, deviates from a circle by zero amount.