What is the wavelength of this wave?
10 cm
15 cm
60 cm
cannot be determined

When an object falls through the air and encounters air resistance its overall speed will be than if it had not encountered air resistance? (one word answer)

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution

I'm learning about the periodic tables and what each subject's configuration is. for example, hydrogen is 1s^1, but i don't understand how you get that. can someone me understand how to figure out how to figure this out? sorry if the question makes no sense, but it would really a lot if you could me understand! you so much if you can!