How is blood kept moving in the large veins of the legs?

Solve the following examples: (numerical problems) A particle of mass 10^(-10) kg moves in a straight line. Figure shows how its speed changes with time. Answer the following questions based on it. Find the average acceleration of the particle in the interval C'D'.

Solve the following examples: (numerical problems) A particle of mass 10^(-10) kg moves in a straight line. Figure shows how its speed changes with time. Answer the following questions based on it. Find the average acceleration of the particle in the time OC'.

Solve the following examples: (numerical problems) A particle of mass 10^(-10) kg moves in a straight line. Figure shows how its speed changes with time. Answer the following questions based on it. Find the average force acting on the particle in the time interval B'C'.

Raj applied a force of 20 N and moved a book 40 cm in the direction of the force. How much was the work done by Raj?

Ravi applied a force of 10 N and moved a book 30 cm in the direction of the force. How much was the work done by Ravi ?

Solve the following examples: Ravi applied a force of 10 N and moved a book 30 cm in the direction of the force. How much was the work done by Ravi?

How does most of the water moves within the root?

Apollo astronauts who stepped on the moon have kept some large mirrors there . Collect information about how the distance to the moon is measured using these .

How is it possible for a child to have blood group O if the parents have blood group A and B?