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99 ml of H2O is initially at room temperature (20.0oC). A chilled steel rod at 2.0oC is placed in the water. If the final temperature of the system is 18.7oC, what is the mass of the steel bar? Specific heat of water = 4.18 J g-1oC-1; specific heat of steel = 0.452 J g-1oC-1
What do you mean by an optical fiber? State its principle. Can we minimize chromatic and spherical aberrations simultaneously? If so, how?
what is the importance of si unit
What is Gas Laws? Kinetic theory states that the speed of motion of the molecules in a substance decreases as the substance's temperature decreases. As well, the speed of motio
Q. A truck loaded with sand accelerates along a highway. If the driving force stays the same on the truck, what happens to the truck's acceleration if its trailer leaks sand at a
what is inertial
#question.1) [chp 2; NC] You drop a superball from your dormitory window, a height, h=30 m, above the ground. 1 s after this your friend shoots a superball straight upward toward t
A ball falling vertically from rest for 3 seconds travels very nearly: a) 14.7 meters b) 29.4 meters c) 44.1 meters d) 88.2 meters Ans: A ball falling ve
A bob hanged to astrirg in a box .it is displaced to an agle of 45 .then fid the acceleration of the box at this moment. Ans) gsin45,that is 10/1.4142.as it would have only tangen
Q. What is electrostatic shielding? i) It is the method of isolating a certain region of space from external field. ii) It is basis on the fact that electric field inside a
These are resistors with long term stability and close tolerances. These are used in measuring instruments. Wire wound resistors, produced with long term stabilities and with speci
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