What is the power of a concave lens of focal length? The power of the lens is the reciprocal of the focal length of the lens. We know that, The focal length is the negative for the concave lens. Hence, The power of the concave lens is -0.5 D. What is the power of a […]
Do trees grow out of the air?
Do trees grow out of the air? But the truth is, trees are actually formed largely out of the air. (Yes, air!) Trees, and all photosynthesizing plants, use the energy of the sun to split atmospheric carbon dioxide into its constituents: oxygen and carbon. And carbon is the primary building block of the tree — […]
How do you get money out without touching the bottle?
Do magnetic lines of force really exist?
Do magnetic lines of force really exist? To describe the phenomena related to magnets, lines are used to depict the force existing in the area surrounding the magnet. These lines are called the magnetic lines of force. These lines do not exist actually, but are imaginary lines that are used to illustrate and describe the […]
Why do wet things stick?
Why do wet things stick? When the surface is wet,things stick to wet surfaces because of water molecules(H2O) present under the object forming a sticky layer.It makes the object sticks to the surface. What problem is created if the sand is too wet? A Sticky Problem Fortunately for beach-goers everywhere, a group of physicists at […]
What is the process of changing gas to solid?
What is the process of changing gas to solid? Deposition is the phase transition in which gas transforms into solid without passing through the liquid phase. Deposition is a thermodynamic process. The reverse of deposition is sublimation and hence sometimes deposition is called desublimation. What are the types of solid solution? There are two classes […]
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How do you calculate projectile distance?
How do you calculate projectile distance? The equation for the distance traveled by a projectile being affected by gravity is sin(2θ)v2/g, where θ is the angle, v is the initial velocity and g is acceleration due to gravity. Assuming that v2/g is constant, the greatest distance will be when sin(2θ) is at its maximum, which […]
How do neutrons affect the human body?
How do neutrons affect the human body? Consequently, in living tissue, neutrons have a relatively high relative biological effectiveness, and are roughly ten times more effective at causing biological damage compared to gamma or beta radiation of equivalent energy exposure. Neutrons are particularly damaging to soft tissues like the cornea of the eye. How can […]
Is Metal a good insulator?
Is Metal a good insulator? Metals such as copper typify conductors, while most non-metallic solids are said to be good insulators, having extremely high resistance to the flow of charge through them. Metals are also generally good heat conductors while nonmetals are not. Which metal is the best insulator? As you can see, out of […]