Thermal Physics — Science STD 10 — Question

Discuss the magnetic separation methods.

A concave lens has focal length of 15 cm. At what distance should the object from the lens be placed so that it forms an image 10 cm from the lens?

Explain Gravity separation method.

Explain the metallurgy of iron.

What is the Doppler effect? Derive the formula for the change in apparent frequency
1. Both source and listener move towards and away from each other.
2. Both source and listener move one behind the other source follows the listener and listener follows the source.
3. A source at rest, listener moves towards and away from the source.
4. A listener at rest, the source moves towards and away from the listener.

Explain the electrolytic refining of copper.

What are the differences between atoms and molecules?

What do you understand about DNA, gene and chromosome in short?

An object 2 cm tall is placed 10 cm in front of a convex lens of focal length 15 cm. Find the position, size and nature of the image formed.

What is the difference between a gene mutation and a chromosomal mutation?