half-life of a certain radioactive substance is 2.5 sec.The initial amount ofsubstance is S。grams.a. Express the amount ofsubstance S remaining as a function of timet.b. How much of the substance isleft after 2.5 sec? after 7.5 sec?c. Determine S。if there was 1 g left after 1 ...
1.Thehalf-life of a certain radioactive substance is 2.5 sec.The initial amount ofsubstance is S。grams.a. Express the amount ofsubstance S remaining as a function of timet.b. How much of the substance isleft after 2.5 sec? after 7.5 sec?c. Determine S。if there was 1 g left after...
The half-life of a certain substance is 24 years. How long will it take for a sample of this substance to decay to 90% of its original amount? The half-life of a certain substance is 26 years. How long will it take for a sample...
Question: The half-life of a radioactive substance is 20 days. Let Q(t) denote the quantity of the substance left after t days.(a) Write a differential equation for Q(t).Q'(t)=◻(b) Find the time required for a gi...
An exponential decay model shows the decrease in the amount of a substance over a period of time. The half-life is the time period wherein the initial amount is halved. This decrease is exponential and is represented by the following exponential function: ...
Step by step video & image solution for 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 di...
Radioactive substance adsorbent and a method of manufacturing the same, as well as the processing method using itPROBLEM TO BE SOLVED: To provide a decontamination agent to be used both for radioactive waste and for a waste fluid.黄義興
The mass of a radioactive substance follows a continuous exponential decay model. A sample of this radioactive substance has an initial mass of1428kgand decreases continuously at a relative rate of15%per day. Find the mass of the sample a...
Half life is the time required for half the amount of a substance (such as a drug, radioactive tracer, or pesticide) in or introduced into a living system or ecosystem to be eliminated or disintegrated by natural processes.半衰期是指生命系统和生态系统中存在或注入的一种物质,比如药物、放射性...
related to radioactive elements. Scientists measure the half-life of a substance because it tells them about the amount of radiation that a given substance will give off. Half-life is a fixed constant for every different substance, allowing experts to accurately predict the lifespan of a ...