Why does the voltage increase when the current decreases? Since the ohmic losses in a transmission line are proportional the square of the current, reducing the current by 50% cuts the power loss by 75%. The current required to carry a given power decrease when you increase the voltage because the power is the product […]
What is the value of tangential acceleration?
What is the value of tangential acceleration? (i) Uniform circular motion – In this type of motion the body rotational speed does not changes i.e. direction of the rotation changes at every moment but magnitude remain same in this case the value of tangential acceleration is zero as there is no change in the magnitude […]
Why minimum energy is needed for an effective collision?
Why minimum energy is needed for an effective collision? Molecules must collide in order to react. In order to effectively initiate a reaction, collisions must be sufficiently energetic ( kinetic energy ) to break chemical bonds; this energy is known as the activation energy. Which reaction happens fastest? Reactions in phases that easily mix, such […]
Why is music bad for you?
Why is music bad for you? Research suggests music can influence us a lot. It can impact illness, depression, spending, productivity and our perception of the world. Some research has suggested it can increase aggressive thoughts, or encourage crime. Is music bad for brain? Exposure to hard rock / acid rock music, regardless of gender, […]
What are the 4 ways to charge an object?
What are the 4 ways to charge an object? There are four methods by which charges can redistribute themselves to build up static electricity: by friction, by conduction, by induction, and by polarization. Charging by Induction: Electrons can react to the electric field of a charged object without touching the object itself. What is the […]
What happens to thermal energy when you increase friction?
What happens to thermal energy when you increase friction? Thermal energy from friction All the work done by the friction force results in a transfer of energy into thermal energy of the box-floor system. This thermal energy flows as heat within the box and floor, ultimately raising the temperature of both of these objects. What […]
Is chalk dissolves in water True or false?
Is chalk dissolves in water True or false? Chalk is insoluble – it does not dissolve in water. Does chalk float in water? Answer Expert Verified Chalk sinks in water because it has higher relative density than water and also it doesn’t have air inside. Is baby powder soluble in water? Accordingly, does baby powder […]
What would cause a car engine to catch on fire?
What would cause a car engine to catch on fire? Top Causes of Car Fires Cars catch fire for a number of reasons. Most issues are mechanical or electrical. The most common danger signs that indicate a car may catch fire include oil or fluid leaks, rapid changes in fuel levels or engine temperature, and […]
What is weather depiction chart?
What is weather depiction chart? A weather depiction chart details surface conditions as derived from METAR and other surface observations. The weather depiction chart is prepared and transmitted by computer every 3 hours beginning at 0100Z time and is valid data for the forecast period. What are the four types of weather observations? There are […]
What can we see with a light microscope?
What can we see with a light microscope? You can see most bacteria and some organelles like mitochondria plus the human egg. You can not see the very smallest bacteria, viruses, macromolecules, ribosomes, proteins, and of course atoms. Can you see bacteria with a light microscope? Can one see bacteria using a compound microscope? The […]