I have a couple of questions ... Waves that we cannot actually see (unlike ripples in water) and those that DO need a medium to travel through belong to which category of waves? an How do astronauts overcome this obstacle (answer #3) when communicating in space? Thanks

As you move from right to left on the periodic table the atomic radius fill in the blank

1. if you have a gas at 127 degrees c, what is it's absolute temperature (kelvin)? a. 200kb. 300kc. 400kd. 500k2. if you had a gas whose absolute temperature measured 45 k, what is that temperature in celsius? a. -228 cb. -300 cc. 125 cd. 112 c

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