Question

A student of class IX, while experimenting with the stretching length of the spring arrived at a

linear equation y = 4x + 3 where ‘x’ denotes weight attached to the spring and y denotes length of

the spring. When x is increased by 2, how much does y increase?
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Answer 1

Step-by-step explanation:

The average time that an atom retains excess excitation

energy before re-emitting it in the form of electromagnetic

radiations is 10 -8 sec. Calculate the limit of accuracy with which

the excitation energy of the emitted radiation can be determined.