What is necessary in order for astronauts to survive long trips into space? a. technologies that permit astronauts to see better

b. technologies that make time go faster

c. technologies that make it easier to study hunger

d. technologies that counteract the effects of weightlessness

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

What is the ph of a 0.0010 m hno3? 1.0 3.0 4.0 5.0