F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems

F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems 1st Year Physics Notes Online Taleem Ilm Hub

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Numerical Problem 1.1 A light year is the distance light travels in one year. How many meters are there in one light year.
Numerical 1.2 Problem (a) How many seconds are there in 1 year?

(b) How many nanoseconds in 1 year?
(c) How many years in 1 second?
Numerical Problem 1.3 The length and width of a rectangular plate are measured to be 15.3 cm and 12.80 cm respectively. Find the area of the plate.

Numerical Problem 1.4 Add the following masses given in kg upto appropriate precision. 2.189, 0.089, 11.8 ans 5.32.
Numerical Problem 1.5 Find the value of g and its uncertainty using formula from the following measurements made during experiment length of simple pendulum l = 100 cm. Time for 20 vibrations = 40.2 s Length was measured by a meter scale of accuracy upto 1 mm and time by stop watch of accuracy upto 0.1s.

Numerical Problem 1.6 What are the dimension and units of gravitational constant G in the formula. G= Gmm/r2.

Numerical Problem 1.7 Show that the expression Vf = Vi + at is dimensionally correct, where Vf is the velocity at time t.
Numerical Problem 1.8 The speed v of sound waves through a medium may be assumed to depend on (a) the density of the medium and (b) its modulus of elasticity E which is the ratio of stress to strain. Deduce by the method of dimensions, the formula for the speed of sound.

Numerical Problem 1.9 Show that the famous Einstein equation is dimensionally consistent.
Numerical Problem 1.10 Suppose, we are told that the acceleration that of a particle moving in a circle of radius r with uniform speed v is proportional to some power of r, say r power n and some power of v, say v power m, determine the powers of r and v?

 Written By: Asad Hussain