PHYSICS CLASS 9...MOTION IN ONE DIMENSION .PART - 1....SCALAR AND VECTORR

STATEMENT - 1 : If the body is moving in the opposite direction of positive motion, then its speed is negative. STATEMENT - 2 : A scalar quantity is one that must be dimensionless. STATEMENT - 3 : A body is momentarily at rest when it reverse its direction of motion.

STATEMENT-1 The dimensional formula for relative velocity is same as that of the charge in velocity STATEMENT-2 [Relative velocity] = [Change in velocity] STATEMENT-3 In addition or subtraction of two physical quantities of same dimension, the result also have same dimensIon only.

Which of the following are correct with reference to energy ? (1) It has dimensions of ML^(2)T^(-2) (2) It is scalar (3 ) Its S.I. unit of watt (4) It can be neither created nor destroyed Select the correct answer using the codes given below

STATEMENT -1 : Solvent have always same physical state as that of solution. and STATEMENT -2 : Solution contains more than one solvent.

A wire of resistanc e 9Omega is broken in two parts. The length ratio being 1:2 . The two pieces are connected in parallel. The net resistance will be

Class 10 Maths Ex 9.1 examples (Part 2) Ch 9 Some Applications of Trigonometry (Heights & Distances)

Name the physical quantitiy whose S.I. unit is JC^(-1) . Is it a scalar or vector quantity ?

If in a class there are 200 students in which 120 take Mathematics, 90 take Physics, 60 take Chemistry, 50 take Mathematics & Physics, 50 take Mathematics & Chemistry, 43 take Physics & Chemistry and 38 take Mathematics Physics & Chemistry, then the number of students who hace taken exactly one subject is

A room is 9 m long, 8 m broad and 6.5 m high. It has one door of dimensions 2mxx1. 5 m and three windows each of dimensions 1. 5 mxx1mdot Find the cost of white washing the walls at Rs 3.80 per square metre.

A U-tube contains a liquid to a height of 9.8 cm in one of the limbs. The tube is vertical. If the liquid on one side is depressed a little and released its motion in the tube is simple harmonic motion. Find its period.