Question

(c) A body is completely immersed in a fluid.
12
State two factors on which the upthrust acting on the body depends.
(d) A and B are two metal spheres which are connected with the help of a metal

wire. State the direction of flow of electrons in each case.
D
(e) Why do we use a convex mirror as a rear view mirror?
12
Question 4
(a) State two differences between an electromagnet and a permanent magnet.
(2
(b) Why does a magnet suspended freely from its CG, always come to rest along
[2
the north south direction of the earth?
(c) State the second law of Thermodynamics in energy flow (Law of conservation
[2.
of energy).
(d) Name and state the principle on which the hydraulic brakes of a car work.
[2
(e) State two main human activities which are responsible for the increase of
[2
carbon dioxide gas in the atmosphere.​

Answer 1

Answer:

5hjj

Explanation:

gdthbkh because hknu

Answer 2

Answer:

Everything in Earth's system can be placed into one of four major subsystems: land, water, living things, or air. These four subsystems are called "spheres." Specifically, they are the "lithosphere" (land), "hydrosphere" (water), "biosphere" (living things), and "atmosphere" (air).