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At what temperature would the average speed of helium atoms equal (a)the escape speed from Earth, 1.12 ´ 104 m/s, and (b) the escape speed from the Moon, 2.37´ 103 m/s? (See Chapter 13for a discussion of escape speed, and note that the mass of a helium atom is 6.64 ´ 10-27 kg.)
Determine the efficiency of a Carnot engine operating reversibly between 40°C to 20°C. Can you explain thermodynamic process? Give a brief account of any two such processes.
Flemings right hand rule: When a straight wire is moved through a magnetic field, an emf is induced in it, in the manner of the coil and magnet experiment. Once again, li
The losses occurring in a transformer are:- I) iron loss II) copper loss
#question 1:successive disintegration in nucluer physics
Q. What is microwave oven? How it works? Microwave oven It is utilized to cook the food in a short time. When the oven is manage the microwaves are generated which in turn
Charge is the characteristic associated with matter due to which it produces and experiences electrical and magnetic effects.
When an orchestra is tuning up, the first violinist plays a note at 256 Hz. a. What is the wavelength of that sound wave if the speed of sound in the concert hall is 340 m/s?
Will an object spinning in zero gravity in vacuum continue spinning until an external force stops it?
What do you mean by total internal reflection? State the conditions to be fulfilled for total internal reflection. Desfine the construction and working of an optical fibre. Sate i
Demonstrating the cause of the phases of the moon Place a lighted candle or electric lamp on a table in a darkened room. Paint an 8 cm rubber ball white. Hold the ball in your
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