Home
Class 12
MATHS
A radioactive substance is subject to th...

A radioactive substance is subject to the law of natural decay `(dv)/(dt)=-kv`, where v is the volume of the substance at time t and k is a positive constant. The half-life of the substance is the time it takes for half the substance to disappear. Calcualte the half-life if 20 % of the substance disappeared in 15 years.

Promotional Banner

Topper's Solved these Questions

  • DIFFERENTIAL EQUATIONS OF THE FIRST ORDER AND FIRST DEGREE

    CHHAYA PUBLICATION|Exercise EXERCISE 11|24 Videos

  • DIFFERENTIAL EQUATIONS OF THE FIRST ORDER AND FIRST DEGREE

    CHHAYA PUBLICATION|Exercise PART -A|30 Videos

  • DETERMINANT

    CHHAYA PUBLICATION|Exercise Sample Questions for Competitive Examination (Assertion -Reason Type )|2 Videos

  • DIFFERENTIATION

    CHHAYA PUBLICATION|Exercise Sample Questions for competitive Exams ( E Assertion-Reason Type )|1 Videos

Similar Questions

Explore conceptually related problems

A radioactive substance is subject to the law of natural decay (dv)/(dt)=-kv where v is the valume of the substance at time t and k is a positive constant. If 40% of the substance disappear in 25 years, find the time it takes to disappear 60% of the substance.

What is mean life of radioactive substance ? Show its relation with half-life .

The half-life of a radioactive substance is 1 y. After 2 y, what will the amount of the substance that will be disintegrated?

What do you mean by half-life of a radioactive substance ?

Write down the law of radioactive decay and explain it with curve . Define half-life of a radioactive substance

Half-life of a radioactive substance is 20 minute. The time between 20% and 80% decay will be

Half of a substance ts consumed tn 40 min. When the quantity of substance ts decreased to half, the half-life of the change is 80 min. The order of reaction is...

Half of a substance is consumed in 40 minutes. When the quantity of the substance is decreased to half, the half-life of the change is 20 minute. The order of the reaction is:

The rate of decay of a radioactive substance at any time is proportional to its mass at that instant. If m_(0) be the mass of the substance at time t=0, find the law of variation of its mass as a function of time t.

In a zero -order reaction , initial concentration of the reactant is a and value of the constant is k . If the time required for the completion of the reaction is t and the value of its half-life t_(1//2) then-