rood with uniform
2.) score is moving on a stroight
occelestion - Drow the speed time großh with the help
of following table and calculate (a) occolation (b) distance
travelled in Sosea
(sec) (20/30/4else
Speed (onis sl lol15/20/25/30
881
Answers
Explanation:
Answer:Graph of the table : Draw X - axis and Y - axis on the graph with appropriate scale.
Let 1 cm = 10 s on X-axis.
Let 1 cm = 5 m on Y-axis.

(i) Acceleration means slope of graph AB
BC / AC = 30 - 5 / 50 - 0 = 25 / 30 = 0.5 m / s2
(ii) Distance travelled by car = Area of trapezium OABD
= 1 /2 (AO + BD) × OD
= 1 / 2 (5 + 30) × 50 = 875 m
Answer:
Boiling point of any liquid increases as the pressure acting over the liquid increases. At higher altitudes, atmospheric pressure is low and thus water boils at temperature lower than
100°C. As a result, the heat provided to open vessel is less, while cooking food for a given period..in a pressure cooker, the pressure is higher than one atmosphere. Due to higher pressure, water.boils at higher temperature than 100°C. Hence more heat is provided for a given time period to cook food and cooking food takes less time. Thus, fuel consumption is less while using pressure cookers to cook food. As it takes less fuel and less time, thus cooking food in pressure cooker is advantageous as compared to cooking in open vessels.