Below are the worked solutions for Heinemann Physics Unit 3 and 4:
Hein_Phys12_ch1_ans.__
Hein_Phys12_ch2_ans
Hein_Phys12_ch3_ans
Hein_Phys12_ch4_ans
Hein_Phys12_ch5_ans
Hein_Phys12_ch6_ans
Hein_Phys12_ch7_ans
Hein_Phys12_ch8_ans
Hein_Phys12_ch9_ans
Hein_Phys12_ch10_ans
VPH12_Unit3_AOSRA1
VPH12_Unit3_AOSRA2
VPH12_Unit3_AOSRA3
VPH12_Unit4_AOSRA1
VPH12_Unit4_AOSRA2