# Quick Answer: What Is The Formula For Activity?

## How do we measure Half Life?

Before the source is used the background count rate is measured using a Geiger Muller tube connected to a counter.

The count rate from the source is then measured at regular fixed intervals over a period of time..

## What is straight line method?

Straight line basis is a method of calculating depreciation and amortization, the process of expensing an asset over a longer period of time than when it was purchased. It is calculated by dividing the difference between an asset’s cost and its expected salvage value by the number of years it is expected to be used.

## What is a decay equation?

Decay Law – Equation – Formula The radioactive decay of certain number of atoms (mass) is exponential in time. Radioactive decay law: N = N.e-λt. The rate of nuclear decay is also measured in terms of half-lives. The half-life is the amount of time it takes for a given isotope to lose half of its radioactivity.

## What are the units of enzyme activity?

The enzyme unit, or international unit for enzyme (symbol U, sometimes also IU) is a unit of enzyme’s catalytic activity. 1 U (μmol/min) is defined as the amount of the enzyme that catalyzes the conversion of one micromole of substrate per minute under the specified conditions of the assay method.

## What is the formula for decay?

Exponential Function and Decay It can be expressed by the formula y=a(1-b)x wherein y is the final amount, a is the original amount, b is the decay factor, and x is the amount of time that has passed.

## How do you calculate the activity of a source?

The activity of a radioactive source is the number of decays per second from the unstable nuclei present in the source. The simplest unit of activity is the Becquerel (Bq). A source that emits one particle per second has an activity of one Bq. Activity can also be measured in counts per minute.

## What is the formula for radioactivity?

The law of radioactive decay describes the statistical behavior of a large number of nuclides, rather than individual ones. The decay rate equation is: N=N0e−λt N = N 0 e − λ t .

## What are the units of activity?

Activity is a quantity related to radioactivity, for which the SI unit is the becquerel (Bq), equal to one reciprocal second. The becquerel is defined as the number of radioactive transformations per second that occur in a particular radionuclide.

## What is difference between activity and concentration?

Question: What’s the difference between the concentration and activity of a solution? Answer: The concentration of a solution is a measure of how much stuff is dissolved in a liquid. … Activity is an effective concentration, based on something called the chemical potential.

## What is activity of radioactive sample?

The activity of a radioactive sample is defined as the rate at which radioactive particles are emitted. Activity is usually represented by the symbol A.

## How do you calculate units of activity?

Under the units of activity method, the company will record \$2 of depreciation whenever it finishes a product. The \$2 is computed as follows: (\$225,000 – \$25,000) divided by the expected 100,000 units of product. In an accounting year when 8,000 units are finished, the depreciation will be \$16,000.

## What is law of radioactive decay?

According to the law of radioactive decay, when a radioactive material undergoes either 𝛼 or β or ℽ decay, the number of nuclei undergoing the decay per unit time is proportional to the total number of nuclei in the given sample material.