To determine how much of Strontium-90 (Sr-90) will remain by 2010, we need to use the concept of radioactive decay. Strontium-90 has a half-life of approximately 28.8 years.

The formula for radioactive decay is:

$A(t) = A_0 \times \left( \frac{1}{2} \right)^{\frac{t}{T_{1/2}}}$

Where:

• $A(t)$ is the activity at time $t$,
• $A_0$ is the initial activity (10 MBq in 1950),
• $T_{1/2}$ is the half-life (28.8 years for Sr-90),
• $t$ is the time elapsed (2010 - 1950 = 60 years).

Now let's calculate the remaining activity.The remaining activity of Sr-90 in the year 2010 would be approximately 2.36 MBq, starting from 10 MBq in 1950.

Do you need more details or have any questions? Here are 5 related questions you might find interesting:

1. How is the half-life of a radioactive substance determined experimentally?
2. What factors influence the rate of radioactive decay?
3. How does the decay of Sr-90 affect the environment and human health?
4. Can the decay of a radioactive isotope like Sr-90 be reversed or slowed down?
5. What are some common uses of Sr-90 in industry and medicine?

Tip: Understanding half-life helps estimate how long it takes for radioactive materials to decay to safe levels.