From 598fb1aea733faa2682b5ad9dcdbd0a33230396d Mon Sep 17 00:00:00 2001
From: Dane Sabo <dane.sabo@pitt.edu>
Date: Tue, 3 Sep 2024 15:11:34 -0400
Subject: [PATCH] vault backup: 2024-09-03 15:11:34

---
 .obsidian/workspace.json                                     | 5 +++--
 .../2024-09-03 Homework 1.md                                 | 4 ++++
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index c38b7b4d..d69ceca3 100755
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -6,6 +6,7 @@
       {
         "id": "26fa757f3b505503",
         "type": "tabs",
+        "dimension": 46.035242290748904,
         "children": [
           {
             "id": "7220717c2848cdda",
@@ -24,6 +25,7 @@
       {
         "id": "f2710f80feb0fcd8",
         "type": "tabs",
+        "dimension": 53.964757709251096,
         "children": [
           {
             "id": "f2f0bf554b1c0989",
@@ -185,8 +187,7 @@
       }
     ],
     "direction": "horizontal",
-    "width": 200,
-    "collapsed": true
+    "width": 200
   },
   "left-ribbon": {
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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 e430bd17..776c6e85 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	
@@ -50,6 +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:
+	$\lambda = \frac{0.693}{t_{1/2}}$
+	$\lambda_{^3H} = \frac{0.693 \text{ decays}}{12.26 \text{ years}} \times \frac{1 \text{ year}}{365 \text{ days}} \times \frac{1 \text{ day}}{24 \text{ hours}} \times \frac{1 \text{ hour}}{3600 \text{ seconds}} =\frac{0.693 \text{ decays}}{386631360 \text{ s}}$
+	$1 \text{ mCi } \times$
 	
 **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:**