1) An astronaut travels from Earth to Mars, where the gravitational field strength near the surface is 2 N/kg. The mass of the astronaut has a mass of 80 kg. take g on Earth= 10 N/kg. now the question: When the astronaut is near the surface on mars, what is his acceleration?

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

If 22.5 liters of oxygen reacted with excess of hydrogen, how many liters of water vapor could be produced?

Choose an equation that represents an enzyme-catalyzed reaction. (a) enzyme + substrate → enzyme-substrate complex (b) enzyme + substrate ←−→ enzyme + products (c) enzyme + substrate ←−→ enzyme-substrate complex → enzyme + products (d) enzyme + substrate ←−→ enzyme-substrate complex → enzyme-substrate complex + products