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Q. Define roentgen and activity and Curie?
One roentgen (1R) is described as the quantity of radiation which produces 1.6 × 1012 pairs of ions in 1 gram of air.
The activity of a radioactive substance is described as the rate at which the atoms decay. Curie is described as the quantity of a radioactive substance which gives 3.7 × 1010 disintegrations per second or 3.7 × 1010 Becquerel.
State the uses of Zinc sulphide Zinc sulphide has a lattice constant of 0.596nm . The sulfide ions are quite big (atomic radius 184 pm) relative to the size of the zinc ions (7
When wave emitted by a self luminous object is dispersed by a prism to get the spectrum, the spectrum is known as emission spectrum.
A straight vertical wire passes by a wooden table top. The wire carries an upward directed current. Evaluate the path of the magnetic field of the wire at a point on the table top
What are the non- medical uses for endoscopy? Non-medical uses for endoscopy are as follows: a. The planning and architectural community have determine the endoscope helpful
A radioactive substance has a half life of 1 min. If one nuclei decays now , when will be next decay????
Explain the meaning of Diffraction The spreading of a wave around a corner or through a slit of width b, which is about an order of magnitude of the size of the wavelength, is
CELL CAPACITY The amount of electrical energy that a cell can provide from new to the end of its useful voltage on load is called the cell capacity and is quoted in Ampere hour
why two alpha particles are not released simultaneously in a radioactive decay???
i need 10 mcqs and 1 structural question
Draw the v-t graph of an automobile that accelerates uniformly from rest at t = 0.00 s and covers a distance of 180.0 m in 12.0 s.
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