a dam is thicker at the bottom than at the top partly because..
a)water is dancer at deeper levels
b)water pressure is greater with increasing depth
c) surface tension exits only on the surface of liquids
d) it looks better
e) non of these
2007-05-26 03:06:14 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Physics
b) water pressure is greater with increasing depth. Pressure = depth * density of liquid * acceleration due to gravity. Therefore if the depth increases the pressure increases and so a dam is made thicker at the bottom to withstand such pressure.
2007-05-26 03:59:07 · answer #1 · answered by rohit_gupta322 2 · 0⤊ 0⤋
b) Water pressure is greater with increasing depth. Importantly the force of water pressure acts in all possible directions (an imbalanced force would cause water to move!). Therefore, with increased depth there is also increased horizontal force trying to push the dam out of the way. One way to counter the increasing force is to make the dam thicker and stronger at increased depth.
2007-05-26 11:16:22 · answer #2 · answered by Kes 7 · 0⤊ 0⤋
b) water pressure is greater with increasing depth.
I guess so.
2007-05-26 10:11:06 · answer #3 · answered by Swaroop B 2 · 0⤊ 0⤋
b
2007-05-26 10:11:18 · answer #4 · answered by PV=NRT 2 · 1⤊ 0⤋
b)
2007-05-26 10:21:40 · answer #5 · answered by santmann2002 7 · 0⤊ 0⤋