A 20 kg red car traveling at 20 m/s collides head on with a 25 kg blue car traveling at 10 m/s. The collision is inelastic. How does the TOTAL momentum BEFORE the collision
compare with the TOTAL momentum AFTER the collision? (Assume no friction or other
forces acting in the system). HINT: use equation #2

Which of the following characteristics are true of enzymes? check all that apply. a.)the structure of an enzyme can change if conditions change. b.)a single enzyme can normally catalyze a wide variety of reactions under many conditions. c.)enzymes are found only in nonliving systems. d.)enzymes allow living things to regulate body conditions through feedback mechanisms. e.)enzymes bind to specific substrates in specific ways. f.)enzymes increase the rate of reaction. g.)when shown in energy-reaction diagrams, enzymes represent the higher activation energy.