From 361b7ad5ac9badaa33aaf9f85c987ae0b8f3daaa Mon Sep 17 00:00:00 2001 From: Dane Sabo Date: Tue, 3 Sep 2024 15:17:15 -0400 Subject: [PATCH] vault backup: 2024-09-03 15:17:15 --- .../2024-09-03 Homework 1.md | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/300s School/302. NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-03 Homework 1.md b/300s School/302. NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-03 Homework 1.md index 776c6e857..6d0e8b0a9 100644 --- a/300s School/302. NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-03 Homework 1.md +++ b/300s School/302. NUCE 2100 - Fundamentals of Nuclear Engineering/2024-09-03 Homework 1.md @@ -50,11 +50,10 @@ $\left(8.98755 \times 10^{13} \text{ J } \right) \times \frac{1 \text{ kg }}{3 \ *a. To what nucleus does $^3\text{H}$ decay?* [Helium-3](https://people.physics.anu.edu.au/~ecs103/chart/) *b. What is the mass in grams of 1 mCi of tritium?* - First we need to find the decay constant for tritium: - $\lambda = \frac{0.693}{t_{1/2}}$ - $\lambda_{^3H} = \frac{0.693 \text{ decays}}{12.26 \text{ years}} \times \frac{1 \text{ year}}{365 \text{ days}} \times \frac{1 \text{ day}}{24 \text{ hours}} \times \frac{1 \text{ hour}}{3600 \text{ seconds}} =\frac{0.693 \text{ decays}}{386631360 \text{ s}}$ - $1 \text{ mCi } \times$ + $1 \text{ mCi } \times \left( 3.7\times 10^{10} \frac{\text{decay}}{\text{s}}\right)$ + + **8. Approximately what mass of $^{90}\text{Sr}$ (T-1/2 = 28.8 years) has the same activity as 1g of $^{60}\text{Co}$ (T-1/2 = 5.26 years)?** **9. Using the chart of the nuclides, complete the following reactions. If a daughter nucleus is radioactive, indicate the complete decay chain:**