Your 'flow experiment' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
Your initial message (if any):
it seems that the equations for this lab are actually not in the problems given in the problem set, they are actually in the first few problems, not those assigned.
Is flow rate increasing, decreasing, etc.?
as the water flows, I expect the rate of flow to decrease
Is the velocity of the water surface increasing, decreasing, etc.?
the velocity of teh bouy's desecent would ctually decrease over time, as the ater level drops more and more slowly.
How would the velocity of the water surface, the velocity of the exiting water, the diameter of the cylinder and the diameter of the hole be interrelated?
the velocity of the water surface is related to the others in that the level drops in relation to the size of the hole, the size of the cylander, and teh height of the surface from the hole. velocity can be found by relating the amount of water flowing out of the hole to the vvelocity of said water, which can be found by calculating the pressures on it. the faster the water flows out of the hole, the higher the volume that flows, and the faster the water level drops
Explain how we know that a change in velocity implies the action of a force:
newton's law. a body at rest tends to stay at rest, and a body in motion tends to stay in motion. as things are changed, this takes a force to make it happen.
Does the depth seem to be changing at a regular rate, at a faster and faster rate, or at a slower and slower rate
gravity might be it. as to the rate of change, the depth is decreaseing at a slower and slower rate.
What do you think a graph of depth vs. time would look like?
it would look like a graph of 1/x^2
Does the horizontal distance (the distance to the right, ignoring the up and down distance) traveled by the stream increase or decrease as time goes on?
the horizontal difference goes down, becasee the velocity of the water stream is less.
Does this distance change at an increasing, decreasing or steady rate?
the distance changes at a steadily decreasing rate
What do you think a graph of this horizontal distance vs. time would look like?
the graph would show a peak at time zero, with a decrease of distance that is much like that of a graph showing 1/x^2, because as time passes, the veleocity decreases at a slower and slowwer rate.
The contents of TIMER program as you submitted them:
The vertical positions of the large marks as you reported them, relative to the center of the outflow hole
Your table for depth (in cm) vs clock time (in seconds)
Is the depth changing at a regular rate, at a faster and faster rate, or at a slower and slower rate?
Your description of your depth vs. t graph:
the clock time is steady, but the water depth decreases at a decreaseing rate.
Your explanation and list of average average velocities:
the average velocity was found by tking the time and the velocity difference and dividing the velocity by the time. this gives a velocity per second
The midpoints of your time intervals and how you obtained them:
Your table of average velocity of water surface vs. clock time:
Your description of your graph of average velocity vs clock time:
Your explanation of how acceleration values were obtained:
the average acceleration is the differece in velocity from one unit to the next. the graph shows that the acceleration is actually negative, and is moving towards zero as time goes by.
Your acceleration vs clock time table:
According to the evidence here, is acceleration increasing, decreasing, staying the same or is in not possible to tell?
the acceleration fot the watersurface is decreasing at a rate that is ess and less as time goes by.
You answered the preliminary questions very well. You will need to complete the experiment and report your data and analysis; when you do you can just 'click through' the questions you have already answered.