Answer:
starts form from a accumulation of gas and dust ,which collapses due to gravity and starts to form stars
Answer:
The correct option is;
(b) 0.8 Tm
Explanation:
Sintering is a form of heat treatment given to introduce a material in powdery form in order to introduce the properties of integrity and strength
by the application of heat to the powder at a temperature below its melting point.
With regards to imparting favorable metal properties in the metal to undergo sintering such as ductility, toughness, porosity, hardness, strength it is required to select a sintering temperature higher than 0.6 - 0.8 Tm.
Hello! I believe you are asking what a Cell wall Is.
Answer:
<em> A rigid layer of nonliving material that surrounds the cells of plants and some other organisms.</em>
Explanation:
A cell wall is<u><em> a sturdy outer layer of protection of the plant cell. It protects the cell membrane and other organelles from the environment, bacteria, and viruses</em></u>. It is composed of cellulose, lignin, and suberin interspersed with carbohydrates and proteins.
Hope this Helps!
It is only a physical change as you are only changing the state of the substance (from liquid to gas)
