Note In stating numerical answers take care of significant 2

Last updated: 6/7/2023

Note In stating numerical answers take care of significant 2 1 Fill in the blanks a The volume of a cube of side 1 cm is equal to m b The surface area of a solid cylinder of radius 2 0 cm and h 1076 mm 4008 mnt c A vehicle moving with a speed of 18 km h covers m L d The relative density of lead is 11 3 Its density is c Fill in the blanks by suitable conversion of units a 1 kg m s g cm s b 1 m ly 2 2 2 3 w EXERCISES c 3 0 m s 2 km h d G 6 67 x 10 N m kg cm s g EOS A calorie is a unit of heat energy in transit and it equals 1 kg m s 2 Suppose we employ a system of units in which kg the unit of length equals m the unit of time is y s S magnitude 4 2 a 3 2 y in terms of the new units 4 Explain this statement clearly To call a dimensional quantity large or small is meaning standard for comparison In view of this reframe the follow necessary a atoms are very small objects b a jet plane moves with great speed c the mass of Jupiter is very large d the air inside this room contains a large number of mo e a proton is much more massive than an electron f the speed of sound is much smaller than the speed of li A new unit of length is chosen such that the speed of light is the distance between the Sun and the Earth in terms of 8 min and 20 s to cover this distance Which of the following is the most precise device for meas a a vernier callipers with 20 divisions on the sliding scale b a screw gauge of pitch