Tutor profile: Noorul I.
Subject: Basic Math
During a race,a dragster is 200 meters from the finish line when something goes wrong and its stops accelerating.It travels at a constant velocity of 45 meters per second for 3 seconds to try to finish the race. How far from the finish line is the dragster after 3 seconds?
Traveling at v=45 m/s for t=3s , the distance covered is: Distance=Speed×Time=45m/s(3s)=135m As such, the racer is 200m−135m=65m
Subject: Basic Chemistry
Ice is slippery, why?
On its own, ice is not slippery. When you step onto an icy sidewalk, you do indeed feel a slippery surface. But the slipperiness is caused by a thin layer of liquid water and not directly by the solid ice itself. Water on a smooth surface is slippery because water is a low-viscosity liquid. As such, there are no permanent intermolecular bonds in liquid water, and the transient intermolecular bonds are weak. This means that water molecules can move about freely, slide past each other easily, and fill any microscopic holes or cracks that would snag an object.
Is it possible for sound waves generate heat?
Yes, sound waves can generate heat. In fact, sound waves almost always generate a little bit of heat as they travel and almost always end up as heat when they are absorbed. Sound and heat are both macroscopic descriptions of the movement of atoms and molecules. Sound is the ordered movement of atoms and molecules in rapid waving patterns. Heat is the disordered, random, movement of atoms and molecules. Therefore, all you have to do in order to turn sound into heat is transform some of the ordered movement of the atoms and molecules into disordered movement. This effect always happens to some extent. This effect happens a lot whenever the sound wave encounters irregularities as it travels.
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