This problem is difficult to answer without more information. Is the well filled with water? If so then you must know the size of the rock and the shape of the rock to calculate the affect of buoyancy and friction due to viscosity. If you assume the rock is dropping through air the only force is that of gravity. Therefore you can use the acceleration due to gravity and the following equation: D= Vinitial*t +(1/2)g*t^2 V initial = 0 here D=340 ft Than solving for time you get: t = 4.6 seconds However if you include all the forces you have the equation: (Mass of rock-density of fluid*volume of rock)*g -force viscosity = mass of rock*acceleration If you take the rock to be a sphere, stokes law under streamline conditions gives viscosity to be F=6*pi*viscosity*radius of sphere*velocity Plugging this in gives you a differential equation that can be solved however in order to solve this problem you would need to assume that the rock reaches terminal velocity before it hits the bottom. At this point the forces add up to zero and you can find a formulation for the terminal velocity and plug it into your differential equation. Sounds difficult but it is just simple mathematics.
how do I treat deep cut under foot
All depends on how deep the water is, and whether the bottom slopes.
Sixty. One full minute = 60 seconds.
There is only so long your body can take holding breath before you pass out or drown, Anything that is over 15-20 seconds is going over the limit, but some lungs can last longer.
29" high (to BOTTOM of desk surface) by 30" deep is very typical. Width varies greatly and should be easier for you to decide upon.
It takes 175,32 seconds
about five metres deep
The Bottom Deep was created in 2011.
he was dropped, hence the sinking and the drowning
The duration of Bells from the Deep is 3600.0 seconds.
The duration of Aliens of the Deep is 2820.0 seconds.
The duration of A Sheep in the Deep is 360.0 seconds.
The duration of A Noise from the Deep is 600.0 seconds.
Second Battle of Deep Bottom happened on 1864-08-14.
The duration of Deep Sea Detectives is 2700.0 seconds.
The duration of Volcanoes of the Deep Sea is 2400.0 seconds.
The pressure at the bottom of the pitcher of water 35cm deep is higher than at the bottom of the bathtub of water 30cm deep. Pressure in a fluid increases with depth, so the deeper the water column, the greater the pressure at the bottom. This is due to the weight of the water above exerting a force on the bottom.