Answer: The focal length of the lens = 3.32 cm.
Explanation:
Lens formula : 
(i)
f= focal length , v=image distance , u =object distance.
magnification: m = 
(ii )
Given: v= -12.8 cm , m =2.85
Put values in (ii), we get
substitute values of u , v in (i)
Hence, the focal length of the lens = 3.32 cm.
Answer:
Physical sciences are those academic disciplines that aim to uncover the underlying laws of nature - often written in the language of mathematics. It is a collective term for areas of study including astronomy, chemistry, materials science and physics.
Explanation:
Producers generate food for primary consumers. They are the basis of the food web because without them, there would be no food web.
Some dogs may inherit a susceptibility to epilepsy.
Electrical energy, a form of kinetic energy results in a flow of electrons.
<u>Explanation:
</u>
Any kind of energy related to flow or motion of objects or particles falls under the category of kinetic energy. When an object undergoes motion or flow, it will exhibit velocity leading to kinetic energy, or energy utilized from the force applied for the motion.
In this case, the electrons will flow between the molecules due to the electric current supplied to it leading to the electrical energy, the flow of electrons generate current in opposing direction to the flow of electrons. Thus, current can be produced due to the flow of electrons on applying electrical energy.
