From 2688e288bc548de64561c2489717bdc21ff18baf Mon Sep 17 00:00:00 2001
From: scottan <33283688+Scottan@users.noreply.github.com>
Date: Wed, 29 Apr 2026 20:39:55 +0100
Subject: [PATCH 1/3] Update 05-units_and_quantities.md

---
 episodes/05-units_and_quantities.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/episodes/05-units_and_quantities.md b/episodes/05-units_and_quantities.md
index 06e7f0a..25defb7 100644
--- a/episodes/05-units_and_quantities.md
+++ b/episodes/05-units_and_quantities.md
@@ -104,7 +104,7 @@ This enables the use of arithmetic operations when quantities have compatible un
 
 ```python
 distance_start = 10 * u.mm
-distance_end = 23 * u.km
+distance_end = 20 * u.km
 length = distance_end - distance_start
 print(length)
 ```

From 6fd7790ab5ed65d83c756572ea432f39cb8f05d3 Mon Sep 17 00:00:00 2001
From: scottan <33283688+Scottan@users.noreply.github.com>
Date: Wed, 29 Apr 2026 20:40:48 +0100
Subject: [PATCH 2/3] add numpy import before use of np.sin()

---
 episodes/05-units_and_quantities.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/episodes/05-units_and_quantities.md b/episodes/05-units_and_quantities.md
index 25defb7..71a0f61 100644
--- a/episodes/05-units_and_quantities.md
+++ b/episodes/05-units_and_quantities.md
@@ -349,6 +349,8 @@ angle in degrees: 90.0; and in radians: 1.5707963267948966
 Now we can pass the angle directly to `np.sin` without having to convert directly to radians:
 
 ```python
+import numpy as np
+
 print(f'sin of 90 degrees is: {np.sin(angle)}')
 print(f'sin of pi/2 radians is: {np.sin(1.57079632)}')
 print(f'sin of 90 degrees is not: {np.sin(90)}')

From b17e59e5a4f6cc2c464c449bf4b3b58f04938836 Mon Sep 17 00:00:00 2001
From: scottan <33283688+Scottan@users.noreply.github.com>
Date: Wed, 29 Apr 2026 20:45:03 +0100
Subject: [PATCH 3/3] Update 05-units_and_quantities.md

Included import for matplotlib
---
 episodes/05-units_and_quantities.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/episodes/05-units_and_quantities.md b/episodes/05-units_and_quantities.md
index 71a0f61..fb539a9 100644
--- a/episodes/05-units_and_quantities.md
+++ b/episodes/05-units_and_quantities.md
@@ -378,7 +378,10 @@ angles = np.arange(181) * u.deg
 ```
 
 ```python
+import matplotlib.pyplot as plt
+
 plt.plot(angles, np.sin(angles))
+plt.show()
 ```
 
 ![](fig/sin_curve_deg.png){alt='Plot of sin curve for degrees between 0-180'}