Is water chemical energy? Water, like many substances, contains two kinds of energy. The first kind of energy is called kinetic energy. This is energy that is used during the execution of processes, such as movement. Because of kinetic energy water can flow and waves can exist. What form is energy stored in the human […]
What is the principle of Electroscope?
What is the principle of Electroscope? The working principle of an electroscope is based on the atomic structure of elements, charge induction, the internal structure of metal elements and the idea that like charges repel each other while unlike charges attract each other. What is the working of an Electroscope? ELECTROSCOPE : Electroscope is used […]
Under what condition concave lens form a real image?
Under what condition concave lens form a real image? Real images can be produced by concave mirrors and converging lenses, only if the object is placed further away from the mirror/lens than the focal point, and this real image is inverted. What does a concave lens do to an image? A lens refracts light and […]
What is the Joule equal to?
At what temperature will the resistance of a copper wire becomes three times?
At what temperature will the resistance of a copper wire becomes three times? 4500C. Which change will increase the resistance of a copper wire? material, eg copper, has lower resistance than steel. length – longer wires have greater resistance. thickness – smaller diameter wires have greater resistance. temperature – heating a wire increases its resistance. […]
What is the advantages and disadvantages of renewable energy?
What is the advantages and disadvantages of renewable energy? Disadvantages of renewable energy resources Energy Resource Advantages Disadvantages Hydroelectric power stations Clean and cheap to run Expensive to set up and output could be affected by drought Solar cells Clean and cheap to run Not always sunny and output does not always outweigh initial cost […]
What are the 5 models of Atom?
What are the 5 models of Atom? Atomic models John Dalton’s atomic model. Plum pudding model. Rutherford’s model of the atom. Bohr’s model of the atom. Electron Cloud Model/Quantum Mechanics Model of Atom. Basic description of the quantum mechanical atomic model: Sources: What was the first atomic model called? Thomson atomic model What are the […]
Is a cookie sheet an insulator?
Is a cookie sheet an insulator? It stops the flow of energy from moving through the material. Many objects that are meant for holding hot objects (soup containers, handles of pots and pans) are made out of heat insulators so that the heat will not transfer through the area it touches. For example, Ted is […]
What does 4 mean in the formula 4na2so3?
What does 4 mean in the formula 4na2so3? Answer: The ‘4’ in front of sodium sulfate formula indicates that there are four molecules of sodium sulfate. What does the 4 mean in the formula 4na2so3 there are four atoms of sodium there are four atoms of sodium sulfite There are four molecules of sodium sulfite […]