+91-8076753736[email protected]
logo
logo
-->

Matter In Our Surroundings

Question
CBSEENSC9005709
Wired Faculty App

All buses and cars these days are fitted with a speedometer, which shows the velocity of the vehicle. A device called odometer records the distance moved by the vehicle. If the reading on the odometer of a vehicle in the beginning of a trip and after 40 minutes were 1048 km and 1096 km respectively, calculate its average velocity. Will the reading on the speedometer show this velocity when the vehicle is moving? Support your answer with reason.

Solution

Distance space covered comma space straight s space equals space 1096 space minus space 1048 space equals space 48 space km Time space taken comma space straight t space equals space 40 space min space equals space 40 over 60 straight h Average space velocity comma space straight v space equals space straight s over straight t space equals space fraction numerator 48 space cross times space 60 over denominator 40 end fraction space equals space 72 space km divided by straight h. 
Speedometer will not show this average velocity because it reads instantaueous velocity which may be different from the average velocity.

Some More Questions From Matter In Our Surroundings Chapter

What is the physical state of water at

a) 25°C
b)00C
c)1000C

What is the physical state of water at
0°C

What is the physical state of water at
100°C

Give two reasons to justify
Water at room temperature is a liquid.

Give two reasons to justify
An iron almirah is a solid at room temperature.

Why is ice at 273K more effective in cooling than water at the same temperature ?

What produces more severe burns, boiling water or steam ?

8. Name A, B, C, D, E and F in the following diagram showing state change :

Both boiling and evaporation convert a liquid into vapour. What is the difference between the two process

Define Evaporation

Mock Test Series

Mock Test Series

NCERT Sample Papers

Entrance Exams Preparation