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A certain radioactive substance has a half-life of 40 minutes. How much of an original 100 grams substance will remain after 2 hours? solution) m= m0/2t/T m=100 gms.. t=2 hours
define rigidity modulus and mention its units.
Davisson-Germer experiment (C.J. Davisson, L.H. Germer; 1927) An experiment which conclusively confirmed the wave nature of electrons; diffraction patterns were observed throu
an attacker at the base of a castle wall 3.65 m high throws a rock straight up with speed 7.40 m/s at a height of 1.55 m above the ground. (a) will the rock reach the top of the wa
The idea that electrons revolved in orbits around the nucleus of an atom without radiating energy away from the atom was postulated by: a) Thompson b) Bohr c) Ruther
Here's what is given: A. There are three 1 meter sticks B. There are four weights: Weight #1 = 1kg Weight #2 = 1.2kg Weight #3 = 1.5kg Weight #4 = 2kg The sticks don't hav
if you drop a ball from a tall building, after 4.2 seconds what is its speed in m/s?
An object is thrown downward from a 150 cliff so that it makes an angle of 30 with the horizontal. (a) How fast will it be going when it hits the ground? (b) How long will it take
Engineers and technologist engage themselves in the design and manufacturing of machine like latches, engines, motors, generators, bulldozers etc. And in the fabrication of vehicle
Infrared radiations and Ultra Violet radiations: What are infrared radiations and Ultra Violet radiations? Ans: Infrared: Wavelengths larger than visible light 2. Wav
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