Infrared in controls I will mark briniest to the one who is correct, also its fill in the blank I wasnt paying attention in school

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

#20 which type of bond is formed when bases pair in dna? ionic bond covalent bond coordinate bond hydrogen bond