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CBSE Class 11-science Answered

MCQ
Asked by | 14 Jun, 2009, 01:50: PM
answered-by-expert Expert Answer

1.Henry Per Meter (H/m) is the unit commonly used in the SI unit system.

2.

The original unit for measuring the amount of radioactivity was the curie (Ci)–first defined to correspond to one gram of radium-226 and more recently defined as:

1 curie = 3.7x1010 radioactive decays per second [exactly].

In the International System of Units (SI) the curie has been replaced by the becquerel (Bq), where

1 becquerel = 1 radioactive decay per second = 2.703x10-11 Ci.

3.1 kilowatt hour = 3.6 × 106 J

4.

5.(4) They change with change of conditions

Answered by | 14 Jun, 2009, 02:04: PM
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