B. Friction is a nonconservative force.
C. Kinetic energy can be transformed into thermal energy.
D. The total energy of all types remains the same in a closed system.
Answer: The correct option A.
Explanation:
Mechanical energy is defined as the sum of the both potential and kinetic energies.
M.E = P.E + K.E
So, from the given options the correct answer is option A.
B. Convection Cells
C. Emanation Cells
D. Radiation
These patterns are called
B. Convection Cells
The equatorial region receives the maximum amount of sunlight as the sun is directly above it. Due to this, the earth experiences a higher temperature, as a result of which the air in this region becomes warm and less dense. It then slowly rises up towards the upper atmosphere, forming a low pressure zone. This air when rises up, slowly cools, and after sometime it falls back. This continuous motion of air mass creates convection cells in the atmosphere.
Thus, the correct answer is option (B).
Find more information about Convection cells here:
The space around a charge or a pole in which a force is experienced is called a magnetic field. And a cluster of aligned magnetic atoms is a magnetic domain. When the clustered regions are aligned with one another, they form a magnet.
Answer:
field
Explanation:
The particles are not compressible.
The particles are charged.
The particles vibrate.
Answer:
The particles have very high speeds.
Explanation:
the force between gas molecules is very weak so the molecules are very least bounded to each other.
Due to very less or weak interaction between the molecules the gas molecules can travel easily in the space.
Since the speed of gas molecules are random and the direction of motion is not influenced by the force between the molecules so here the gas can be compressed easily.
Due to this high speed of gas molecules they do not have a finite shape and it will obtain the shape of the container in which it is stored
So correct answer will be
The particles have very high speeds.