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Explain the Process of Phase ChangesMatter exists in three forms: as a solid, a liquid or as a gas. These are called phases of matter. If we take a chunk of ice (solid water) from the freezer and leave it in a pan on the kitchen counter, it is easy to predict that it will melt (become liquid water). If you then place the pan of water on the stove and heat it, it will boil and evaporate (become gaseous water - water vapor).
Typically, as you add heat to a solid, it expands and becomes a liquid, which expands and becomes a gas. The gas will then continue to expand as it is heated.
Advantages of A.C. transmission of power 1. The power can be produced at high voltages. 2. The maintenance of a.c. sub-stations is simple and cheaper. 3. The a.c. voltage
Can you explain Ohms Law? Ans. If Temperature remains constant then current flow is directly proportional to applied Voltage. I ∝ V, I = V/R (resistance of the conductor)
Which of the following has the same mass as that of an electron: (1) Photon (2) Neutron (3) Positron (4) Proton Ans: Positron
Define Laterite stone. Laterite is called sedimentary rock. It has porous and spongy structure and can be simply quarried in blocks. It have high percentage of oxide of ion and
A car of mass 800 kg is pulling a trailer of mass 300 kg up the slope of angle ? to the horizontal where sine ? = 1/200. Resistance to motion (apart from gravity) is 1.5 N per kg o
Q. In the given circuit, calculate the potential differences across each resistor Solution : i) R s = R 1 + R 2 + R 3 = 10Ω ii) Current in circuit I = V/R s
Q. What does the MeV in MeV photon mean? Answer:- The MeV denotes million electron volts. It's a calculation of the energy the energy in the photon which is a quantum (or
What do you understand by "Absorption coefficient"? which is a better absorber of sound, glass or fibre glass?
composition of mosfet .
what is gravity caused by and what is its exact pull
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