Last seen: Jul 17, 2023
Example of good domestic fuel: LPG.
Diesel is used to drive heavy vehicles.
Dung cakes < Coal < Alcohol < Diesel < LPG
Hydrogen gas > Methane > Petrol > Kerosene > Biogas > Wood
(i) cooking gas – D (ii) alcohol – E (iii) wood – B (iv) hydrogen – C (v) kerosene – A
Fuel Y is a better fuel because (i) it has a moderate ignition temperature of 75°C (ii) it produces no harmful gases like CO on burning.
Fuel B is the most ideal fuel because: (i) it leaves no residue on burning. (ii) it has high calorific value of 48 kJ/g. (iii) it does not burn ...
Fuel A: (i) Lower calorific value of 55 kJ/g (Disadvantage) (ii) Moderate ignition temperature of 80°C (Advantage) (iii) No harmful gases produc...
(a) The material which is burnt to produce heat energy is known as a fuel. Ex. Wood, coal, LPG, kerosene, diesel etc. (b) Characteristics of ideal...
Coal is a non-renewable source of energy because it has accumulated in the earth over a very very long time, and if all the coal gets exhausted, it ca...
(a) Renewable source of energy - wind, tides, wood Non- Renewable source of energy - coal, petroleum, natural gas (b) The above classification is ...
Petroleum and coal are non-renewable sources of energy because they cannot be used again once exhausted.
Let us make the denominators same, say 80. 3/5 = (3 × 16)/(5× 16) = 48/80 3/4 = (3 × 20)/(4 × 20) = 60/80 Ten rational numbers between 3/5 and 3...
-2 can be written as - 20/10 Hence, we can say that, the five rational numbers greater than -2 are -10/10, -5/10, -1/10, 5/10, 7/10
(i) 2/3 and 4/5 Let us make the denominators same, say 60 i.e., 2/3 and 4/5 can be written as: 2/3 = (2 × 20)/(3 × 20) = 40/60 4/5 = (4 × 12)/...
Let us make the denominators same, say 50. -2/5 = (-2 × 10)/(5 × 10) = -20/50 1/2 = (1 × 25)/(2 × 25) = 25/50 Ten rational numbers between -2/5 ...
The number 2 can be written as 20/10 Hence, we can say that, the five rational numbers which are smaller than 2 are: 2/10, 5/10, 10/10, 15/10, 19/...
Divide the line between the integers into 11 parts. Thus, the rational numbers -2/11, -5/11, -9/11 lies at a distance of 2, 5, 9 points away from 0,...