From 163814c84f103a02337335d003b2913e1ee3121a Mon Sep 17 00:00:00 2001
From: swetha3456 <swetha.murali@iiitb.ac.in>
Date: Sun, 1 Oct 2023 12:03:41 +0530
Subject: [PATCH 1/3] created file energy_mass_equivalence.py

---
 physics/energy_mass_equivalence.py | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 physics/energy_mass_equivalence.py

diff --git a/physics/energy_mass_equivalence.py b/physics/energy_mass_equivalence.py
new file mode 100644
index 000000000000..b0f8decd2df9
--- /dev/null
+++ b/physics/energy_mass_equivalence.py
@@ -0,0 +1,21 @@
+"""
+Calculates the energy equivalent (in J) of a given mass (in kg).
+
+- In physics, mass–energy equivalence is the relationship between mass and energy in a system's rest frame.
+- The two quantities differ only by a multiplicative constant and the units of measurement.
+- The principle is described by the physicist Albert Einstein's formula: E = mc².
+
+Source: https://en.wikipedia.org/wiki/Mass%E2%80%93energy_equivalence
+
+"""
+
+def energy_eq(mass: float) -> float:
+    """
+    Calculate energy equivalent. 
+    The energy equivalent of a mass m is mc², where c is the speed of light.
+
+    """
+    if mass < 0:
+        raise ValueError("The mass of a body cannot be negative")
+    c = 2.99792458e8
+    return mass * c ** 2
\ No newline at end of file

From 10e8bcb4965db2cf66df2b98db8f67f97939563e Mon Sep 17 00:00:00 2001
From: swetha3456 <swetha.murali@iiitb.ac.in>
Date: Sun, 1 Oct 2023 12:27:12 +0530
Subject: [PATCH 2/3] added doctest

---
 physics/energy_mass_equivalence.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/physics/energy_mass_equivalence.py b/physics/energy_mass_equivalence.py
index b0f8decd2df9..a894169ad192 100644
--- a/physics/energy_mass_equivalence.py
+++ b/physics/energy_mass_equivalence.py
@@ -14,8 +14,15 @@ def energy_eq(mass: float) -> float:
     Calculate energy equivalent. 
     The energy equivalent of a mass m is mc², where c is the speed of light.
 
+    >>> energy_eq(0.001)
+    89875517873681.77
+    
     """
     if mass < 0:
         raise ValueError("The mass of a body cannot be negative")
     c = 2.99792458e8
-    return mass * c ** 2
\ No newline at end of file
+    return mass * c ** 2
+
+if __name__ == "__main__":
+    import doctest
+    doctest.testmod()
\ No newline at end of file

From fb92a73b35848596ea324fae771b563283805c24 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Sun, 1 Oct 2023 06:59:56 +0000
Subject: [PATCH 3/3] [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci
---
 physics/energy_mass_equivalence.py | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/physics/energy_mass_equivalence.py b/physics/energy_mass_equivalence.py
index a894169ad192..24e97b6af7a4 100644
--- a/physics/energy_mass_equivalence.py
+++ b/physics/energy_mass_equivalence.py
@@ -9,20 +9,23 @@
 
 """
 
+
 def energy_eq(mass: float) -> float:
     """
-    Calculate energy equivalent. 
+    Calculate energy equivalent.
     The energy equivalent of a mass m is mc², where c is the speed of light.
 
     >>> energy_eq(0.001)
     89875517873681.77
-    
+
     """
     if mass < 0:
         raise ValueError("The mass of a body cannot be negative")
     c = 2.99792458e8
-    return mass * c ** 2
+    return mass * c**2
+
 
 if __name__ == "__main__":
     import doctest
-    doctest.testmod()
\ No newline at end of file
+
+    doctest.testmod()