Among the alkali metals, the tendency to react with other substances. a. does not vary among the members of the group. b. increases from top to bottom within the group. c. varies in an unpredictable way within the group. d. decreases from top to bottom within the group.

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

The peak wavelength for the blackbody curve of a star is in the uv range. assuming the radiation from this star can reach earth, would you be able to see it?

Why does the sun appear to be the brightest star in the sky? a- its apparent brightness is much greater than other stars. b- it burns more gas, making it brighter than any other star. c- it is the largest star in the galaxy, so it is the brightest star. d- its relative distance to earth is closer than the other stars.