Subject: General Science

Explanation
Thermochemistry is the study of chemical reactions and the energy changes that involve heat. *** RY24012023

Explanation
The burning of substances in air or oxygen on heating, with the release of a large amount of heat energy and light energy, is called combustion while In conduction , heat transfer occurs between objects by direct contact. In convection , the heat transfer takes within the fluid Condensation is the process by which water vapor in the air is changed into liquid water; it's the opposite of evaporation ** ND22-1-2023 *** RY24012023

Explanation
Convex lenses are also known as converging lenses since the rays converge after falling on the convex lens. The concave lens are known as diverging lenses, as the rays diverge after falling on the concave lens. *** RY24012023

Explanation
The Milky Way is the galaxy that contains our solar system It consists of  100–400 billion   stars The Milky Way is a huge collection of:  stars dust gas It is visible as a hazy band of white light Additional Information The nearest galaxy to our Milky Way is  Andromeda Largest galaxy in the Universe is  a Spiral galaxy

Explanation
Retina : The retina is the light-sensitive tissue at the back of the eye. The retina converts light into electrical impulses that are sent to the brain through the optic nerve. Vitreous gel : The vitreous gel is a transparent, colorless mass that fills the rear two-thirds of the eyeball, between the lens and the retina. *** RY24012023

Explanation
Inclined planes are used to move heavy loads over vertical obstacles. The inclined plane is one of the six classical simple machines defined by Renaissance scientists.  ND20-1-2023

Explanation
The Earth's Moon has considerably less mass than the Earth itself. Not only is the Moon smaller than the Earth, but it is only about 60 percent as dense as Earth. Thus, the gravitational attraction on the Moon is much less than it is here on Earth , and a person weighs less on the Moon. ND20-1-2023

Explanation
The physical weight of our body is determined by the pull of gravity on it ND20-1-2023

Explanation
When two surfaces slide over one another the tiny bumps push on each other.
Friction causes a force on a surface  that is in the opposite direction to its motion.
Friction can be reduced by the application of lubricants
ND20-1-2023

Explanation
  A solution that has a relatively less amount of solute in comparison to the solvent is called a dilute solution. **** ND20-1-2023