Describe the change in melting point of an object due to pressure. Variation of pressure on an object has effects on changing the melting point. This can happen in two ways? 1) The substances whose volume reduces while converting from solid to liquid (like ice), their melting point reduces as the pressure increases. They get … Read more
Is it possible to get an efficiency of 100% or more in real? In real, efficiency can never be 100% or more than that. Because, when we give an amount of energy to any machine, some part of that energy is converted as the output energy that we can use. Rest of the energy is … Read more
If the density of an object is equal to the density of water, what will happen? If the density of an object is equal to the density of water, then the object remains where it is put in the water, it will not float above or even sink below.
Why an egg is released into a water-filled container it will get drowned, but if the container is filled with salted water, then the egg will float? The density of clear water (1000 kg m-3) is less than the density of salted water (1024 kg m-3). That’s why buoyancy in salted water is much more … Read more
What are the differences between energy and power? The capacity of doing work is energy. On the other hand, the amount of work done in unit time is known as power. Energy is determined by total work done. So there is no need of time in calculating energy. On the other hand, for calculating power … Read more
What do you understand by a motor’s power is 2 HP? The rate of work done of an object or person is known as the power of that object or person. A motor’s power is 2 HP (Horse Power) or (2⨯746) = 1492 W means that it can do 1492 J work per second.
The advantages of using solar energy. The advantages of using solar energy is there is no possibility of environmental pollution. There is no danger in using this energy. Solar energy is renewable energy.
Why efficiency is written in percentage? Efficiency is written in percentage unit. Efficiency is the ratio of the amount of useful work to the total energy given. From the percentage value of efficiency, we can know how much of the input energy is ultimate of use. Like if an engine has an efficiency of 50%, … Read more