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what is FrictionWhen we think about friction, there is one more place for energy to go - heat. When you push a book across a table, does the energy of the book change? Not if in the end, it is sitting still at the same height. Where did the energy from the work you did pushing the book across the table go? Into fighting friction, which does work but does not change the total energy of the book. It does no useful work. The energy used fighting friction goes into heat generated where the objects touch, the surface of the book and the surface of the table. Friction always uses up energy, because it always works against motion.
Question 1. Discuss the quality control measures for ultrasound equipment? 2. What are the different kinds of transducers available? How will you select the appropriate tran
Energy gap: 1.4ev at room temperature Its charactistics are very closely related to those of germanium. This is under stable, since Gallium is the third column neighbour and a
As electron hole pair (because of thermal collisions) is continuously formed in the depletion region. These are a regular flow of electrons in the direction of the N-side and of ho
What are the components of endoscope? An endoscope can consist of following components • A rigid or flexible tube • A light delivery system to clarify the organ or object
Cathode rays are : (1)Protons (2)Electrons (3)Neutrons (4)alfa -particles Ans; (2)Electrons
In a movie, Tarzan evades his captors by hiding underwater for many minutes while breathing through a long , thin reed . Assuming the maximum pressure difference his lungs can mana
Mach number is the ratio of velocity of source to the velocity of sound. Mach Number = Velocity of Source / Velocity of Sound .
what is the speed of light
Some wire of cross-sectional area 1mm 2 has a resistance of 20 ?. Determine (a) the resistance of a wire of the same length and material if the cross-sectional area is 4mm 2 ,
what is the physics principle involved in the lens maker equation
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