#1
G|----------------------9--------------------|
D|-------------------------h10--------------|

there is a bass tab with that in it. I dont understand what it means where is the 10 hammered on from? Is it 9h10 or is it 0h10 or is it the 9 on the G hammer to the 10 on the D?? (if thats grammatically correct)
#2
You fret the nine and play it with your pick, and then with the 10 you just hammer on without touching the string with your pick. Do it hard so it's audible.