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Thursday, 10 September 2015

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

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


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?
F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems Asad Hussain
(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.
F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems Asad Hussain 1
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.
F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems Asad Hussain 2
Numerical Problem 1.6 What are the dimension and units of gravitational constant G in the formula. G= Gmm/r2.
F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems Asad Hussain 3
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.
F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems Asad Hussain 4

F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems Asad Hussain 5
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?

F.Sc ICS Notes: Physics XI: Chapter 1 Measurements Numerical Problems Asad Hussain 6

 Written By: Asad Hussain

2 comments:

  1. Prove that 2as=vi^2-vf^2 is dimensionlly correct

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