physics sample tests

refers to the process of taking instantaneous values of the message signal at regular intervals (in the case of uniform sampling.) This makes the time-frame (of the analog signal) discrete. Most pulse systems are based on sampling of the information signal amplitude at periodi..

The number N A , given by N A = 6.023x10 2 3 mol - 1 is called Avogadro's number, named after Italian scientist Amadeo Avogadro (1776-1856), who suggested that all gases contain the same number of atoms or molecules when they occupy the same volume under the same conditions of temperature and ..

It makes sense to measure the sizes of our samples in moles. If we do so, we can be certain that we are comparing samples that contain the same number of atoms or molecules. The mole is one of the seven SI base units and is defined as follo..

The number of atoms disintegrated per second at any instant is directly proportional to the number of radioactive atoms actually present in the sample at that instan..

A nucleus of UX 1 has a half life of 24.1 days. How long a sample of UX 1 will take to change 90% of it to UX 2..

08. - A nucleus of UX 1 has a half life of 24.1 days. How long a sample of UX 1 will take to change 90% of it to UX 2..

Dulong and Petit Law (Specific Heat of Solids) - In 1819, two French physicists Dulong and Petit discovered that the average molar specific heat at constant pressure for all metals, except the very light ones, is approximately the same and equal to nearly 25 J mole -1 o C -1 . Although the law is a..

If 200 MeV energy is released in the fission of a sample nucleus of 9 2 U 2 3 5 , how many fissions must occur per second to produce a power of 1 k..

Not all atoms of a given sample disintegrate together. Some atoms disintegrate right in the beginning for which the lifetime is zero. Therefore the lifetime of atoms, which disintegrate in between, ranges from zero to infinity...

11. - If 200 MeV energy is released in the fission of a sample nucleus of 9 2 U 2 3 5 , how many fissions must occur per second to produce a power of 1 k..