diff --git a/.gitignore b/.gitignore
index 3694672..16b04ac 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,7 +34,6 @@
 # Output formats
 *.dvi
 *.xdv
-*.pdf
 *-converted-to.*
 
 # Editor / system junk
diff --git a/ap-physics-c-handbook.fdb_latexmk b/ap-physics-c-handbook.fdb_latexmk
index 6c4aced..b032d89 100644
--- a/ap-physics-c-handbook.fdb_latexmk
+++ b/ap-physics-c-handbook.fdb_latexmk
@@ -1,5 +1,5 @@
 # Fdb version 4
-["pdflatex"] 1777515631.04461 "ap-physics-c-handbook.tex" "ap-physics-c-handbook.pdf" "ap-physics-c-handbook" 1777515639.96224 2
+["pdflatex"] 1777519052.34881 "ap-physics-c-handbook.tex" "ap-physics-c-handbook.pdf" "ap-physics-c-handbook" 1777519061.10476 0
   "/usr/share/texmf-dist/fonts/enc/dvips/cm-super/cm-super-ts1.enc" 1775415801 2900 1537cc8184ad1792082cd229ecc269f4 ""
   "/usr/share/texmf-dist/fonts/enc/dvips/newpx/px-lms.enc" 1775415801 3877 2ca811886181a05a861d20a35de75e06 ""
   "/usr/share/texmf-dist/fonts/map/fontname/texfonts.map" 1775415801 3524 cb3e574dea2d1052e39280babc910dc8 ""
@@ -271,9 +271,9 @@
   "/usr/share/texmf-dist/web2c/texmf.cnf" 1775415801 43569 fd570f2fa160877d211e859f687312ba ""
   "/var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map" 1776575519 5385779 47c0c393a77fd4a098bacfd57d66b88a ""
   "/var/lib/texmf/web2c/pdftex/pdflatex.fmt" 1776575472 2328187 fb96cb30bf291de8e38f8845261354ba ""
-  "ap-physics-c-handbook.aux" 1777515639.87312 61680 6925257077ed52726ac68bc0fe921e72 "pdflatex"
-  "ap-physics-c-handbook.tex" 1777437852.08245 297 1e80993be553e5aed7045a137142eeea ""
-  "ap-physics-c-handbook.toc" 1777515639.88212 9527 af19beb5154471e8725e536d6c61c243 "pdflatex"
+  "ap-physics-c-handbook.aux" 1777519061.01001 61514 ee16acbb72b662daf971f4526ca0b681 "pdflatex"
+  "ap-physics-c-handbook.tex" 1777518704.08899 297 1e80993be553e5aed7045a137142eeea ""
+  "ap-physics-c-handbook.toc" 1777519061.01901 9527 ad561207ff5301ababad7689c0e80e7b "pdflatex"
   "chapters/em.tex" 1777435981.31891 184 3a73f8ef772f374904be6dc5b42ec58e ""
   "chapters/mechanics.tex" 1777435981.31691 238 6096cb3cabf860d0a1656c3308660d8b ""
   "concepts/em/u10/e10-1-conductors.tex" 1777442864.91105 5282 916c5a8cf40965e28680ea4237dec9a9 ""
@@ -283,14 +283,14 @@
   "concepts/em/u10/e10-5-dielectrics.tex" 1777443164.89934 7146 2e2389453d0f37decd9d399854bf2df7 ""
   "concepts/em/u11/e11-1-current-density.tex" 1777443164.40334 4145 9ad7c96190c6a2623dc6304500994c23 ""
   "concepts/em/u11/e11-2-resistance-ohm.tex" 1777510189.81107 8211 9a045c3da3c0e6aef6dfb0d3d5f93279 ""
-  "concepts/em/u11/e11-3-power.tex" 1777509802.85828 4360 7d08a2ca23aaa3f545f4085fd442c6f6 ""
+  "concepts/em/u11/e11-3-power.tex" 1777519007.21585 4355 2091c434b1b925d84b248217e5d0b903 ""
   "concepts/em/u11/e11-4-equivalent-resistance.tex" 1777509808.32129 9914 60e1dbdb62f236b1d812d7d2ff7e7195 ""
-  "concepts/em/u11/e11-5-kirchhoff.tex" 1777514727.90339 11333 b4de4ac214eb66f981f863fb32d63fa9 ""
+  "concepts/em/u11/e11-5-kirchhoff.tex" 1777516746.31264 11280 d9db69d129a03012cd2ae8dc9ee97740 ""
   "concepts/em/u11/e11-6-rc-circuits.tex" 1777509831.29634 13152 d24dfec62077d763f98dcfee49b198fa ""
   "concepts/em/u11/e11-7-internal-resistance.tex" 1777509848.53437 10178 8d8112fb8409c2ab13c17a664ceec4ab ""
   "concepts/em/u12/e12-1-magnetic-force-charge.tex" 1777512906.41444 6565 24cb1b26bb0cb2f2f85da84cb3009765 ""
   "concepts/em/u12/e12-2-particle-motion-in-b.tex" 1777512908.82144 9681 cacc827f70d4e504a49f85ca62a452d9 ""
-  "concepts/em/u12/e12-3-force-on-current.tex" 1777515613.15003 13419 98647cde47acecb3d60e0598b7d93f24 ""
+  "concepts/em/u12/e12-3-force-on-current.tex" 1777515778.6996 13422 7ee71deb77f0863ed38a88c70b1102e6 ""
   "concepts/em/u12/e12-4-biot-savart.tex" 1777514409.5274 12889 45d0158340ec1822f969341c8d1276ad ""
   "concepts/em/u12/e12-5-ampere.tex" 1777512876.65543 9384 85b7732e2abb310a79903b0a22f7bba2 ""
   "concepts/em/u12/e12-6-solenoids-dipoles.tex" 1777512915.56444 13079 e5115a024a15026d54445f55f76e8439 ""
@@ -344,7 +344,7 @@
   "concepts/mechanics/u6/m6-1-rotational-energy.tex" 1777514602.56693 6241 3ba040e1097e317e89140cbe9599c9a4 ""
   "concepts/mechanics/u6/m6-2-angular-momentum.tex" 1777514603.87993 6067 36be0795588107d03f88da415f8bb0cc ""
   "concepts/mechanics/u6/m6-3-angular-momentum-conservation.tex" 1777441084.87106 5751 dcd5cfaea026ea8fa667a76f4d994d06 ""
-  "concepts/mechanics/u6/m6-4-rolling.tex" 1777515630.56709 8329 307b0488ac24b36750449ee412c23df0 ""
+  "concepts/mechanics/u6/m6-4-rolling.tex" 1777515823.70875 8220 bfd1d174ee3786540b36578f16316583 ""
   "concepts/mechanics/u6/m6-5-orbits.tex" 1777515590.32395 5509 8a1175048c6c6ae4c7d86443c0486e05 ""
   "concepts/mechanics/u7/m7-1-shm.tex" 1777441407.14996 4249 7bec3c1a68db56fb629d3bf9b09a45a4 ""
   "concepts/mechanics/u7/m7-2-spring-oscillator.tex" 1777441405.79096 5708 046d291916a21159ec49d9b359fedb3a ""
diff --git a/ap-physics-c-handbook.pdf b/ap-physics-c-handbook.pdf
new file mode 100644
index 0000000..2a78f7b
Binary files /dev/null and b/ap-physics-c-handbook.pdf differ
diff --git a/ap-physics-c-handbook.synctex.gz b/ap-physics-c-handbook.synctex.gz
deleted file mode 100644
index 76b3675..0000000
Binary files a/ap-physics-c-handbook.synctex.gz and /dev/null differ