Question

this is a question paper of 9th class science plz solve it​

Answer 1

Answer:

20. separating funnel is a method

21 a. momentum is a product of mass and velocity which is directly proportional to the applied force.

21 b. momentum=mass × velocity

1000 kg × 36km/hr

36000kg/hr

22 1. Speed- distances per unit time covered by object is called its speed

SI unit is metre per second

it is scalar quantity

it is always positive cannot be zero and negative

velocity- displacement per unit time covered by an object is called its velocity

its SI unit is metre per second