one year ago Grade -11 (NEB) > Science **Physics**
**Dimensional Analysis and Applications, Physical Quantities**

The density of gold is 19.3 gm/cc. Express its value in the SI unit.

Check the correctness of the relation, \(h=\frac{2T\cos\left(\theta\right)}{r\rho g}\), where symbols have usual meaning.

A student writes an expression of the force causing a body of mass (m) to move in a circular motion with a velocity (v) as **F = mv ^{2} uses** the dimensional method to check its correctness.

Check the correctness of the formula, PV = RT using the dimensional method.

Check dimensionally the correctness of Stoke's formula, F = 6π**ηrv**

A student writes an expression of the momentum (p) of a body of mass (m) with total Energy (E) and considers the duration of the time (t) as \(p=\sqrt{2m\frac Et}\). Check its correctness by using dimensional analysis.

The energy of a photon is given by E = hf. Find the dimension and unit of the plank's constant, where f is the frequency of radiation.

Convert 20 dyne to Netwon using the dimensional method.

Check the correctness of the given equation by using dimensional analysis. **v = u + 5 at**,

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- 2022-03-20 12:45
- 60 Mins
- 12 Enrolled

- 25 Full Marks
- 10 Pass Makrs
- 25 Questions

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