Force and Laws of Motion Quiz – 1 Test yourself what you have studied in this chapter with the help of this quiz created by the BrainIgniter experts and improve your study accordingly. Get the result instantly by clicking on submit button. Best wishes! [WATU 6]
Gravitation Quiz – 1 Test yourself what you have studied in this chapter with the help of this quiz created by the BrainIgniter experts and improve your study accordingly. Get the result instantly by clicking on submit button. Best wishes! [WATU 4]
Motion Quiz – 1 Test yourself what you have studied in this chapter with the help of this quiz created by the BrainIgniter experts and improve your study accordingly. Get the result instantly by clicking on submit button. Best wishes! [WATU 2]
Why Do We Fall Ill Notes Health Health is a state of complete physical, mental and social well-being. Necessary conditions for good health Personal hygiene Good physical and social environment Public cleanliness Good economic conditions and jobs opportunities Social equality and harmony and many more. → So, personal and community issues both matter for good […]
Aim To establish the relationship between the loss in weight of solid when fully immersed in (i) tap water(ii) strongly salty water,with the wait of water displaced by it by taking at least two different solids. Apparatus Required spring balance, two small different (metallic) solid bodies, eureka can, measuring cylinder, a strong thread, tap water […]
Aim To determine the density of solid (denser than water) by using a spring balance and a measuring cylinder. Materials Required Spring balance, measuring cylinder, water, solid body (denser than water) Theory The density of a substance is defined as its mass per unit volume. i.e., Density = S.I. unit of volume:- Kg/m3 Procedure Firstly […]
Sound Important Questions What do you mean by the intensity of sound ? What is the S.I. unit of intensity of sound? Establish relationship between speed of sound, its wavelength and frequency. Write the factors on which the speed of sound depends upon. Waves of frequency 100 Hz are produced in a string as shown […]
Exercise 2.1 Which of the following expressions are polynomials in one variable and which are not? State reasons for your answer:-(i) 4×2– 3x + 7(ii) y2+√2(iii) 3√t+t√ 2(iv) y+(v) x10+y3+t50Sol:- (i) 4×2–3x+7 is a polynomial in one variable. The equation 4×2–3x+7 can be written as 4×2–3×1+7×0 and since x is the only variable in the given equation […]
Exercise 1.1 Is zero a rational number? Can you write it in the form p/q,where p and q are integers and q ≠0 ?Ans:- Yes zero is a rational number.we can write zero as :-0/1, 0/2Thus we can write 0 in the form of p/q where p and q are integers and q ≠0 . Hence, […]
In-Text Questions Solutions In Text-Questions Page 148 A force of 7 N acts on an object. The displacement is, say 8 m, in the direction of the force (Fig. 11.3). Let us take it that the force acts on the object through the displacement. What is the work done in this case?Ans:- When a force […]