I cannot thank you enough, I was completely confused at the beginning of this analysis I now have an idea what's going on and I have nearly 3 pages of calculations to review and show off, plus i have two more equations that i can play with(terminal velocity, and drag force) more brownie points...
Sorry yes I just check that 1 kg/ms = 1 Pa.s which is the unit of dynamic viscosity, while looking at this I also read a published value for glycerol viscosity to be 1.412Pa.s
Which is close to my first 3 results, and make's me believe the above post(about why my results are distored) could...
I think the problem was with the length of my tube, and the heavier balls where not reaching terminal velocity. The tube was much larger than the balls in diameter so i don't think the walls would have affected the results as drastically as this.
I tested ball bearings ranging from 4mm-14mm...
All information helps at the moment, thanks :)
Can any clear up this for me though, is it accurate to say.
The viscosity of a fluid is constant at a constant tempreture.
But the coeffecient viscosity is not constant and is dependant on the objects radius and velocity(and thus force) that...
Hmmm I am analayzin my results and the only way that this is possible if the coeffienct of viscosity is dependant on radius and is not constant just like with velocity.
This should really be called the coeffienct of drag on an object as it travels through a liquid under certain conditions. ?:P
Hi Chet,
Thanks for the reply yes the is the formulae I am using, but i am getting some strange results, for instance this is my equation for a 12 mm ball.
{\frac{2}{9}}*{\frac{(7718.78−1260)}{0.27}}*9.81*0.006^2 = 1.87735
and this is my equation for a 14mm ball...
Can any clear this up for me coefficient viscosity of a fluid should be constant no matter the radius of the ojects ? or would it increase as the radius of the object increased?
Homework Statement
I have been given an experiment to perform, whereby I drop steel ball bearings into a glass measuring cylinder, and time how long it takes for the ball bearing to fall a set distance.
From this I should be able to work out the viscosity coeffienct of the glycerol.
I have...
Ok thanks, i was unsure if the question was asking about the whole journey or just the return trip. Having 0 displacement from the origin makes sense tho, ie displacement/time or 0/1800 = 0ms
Thanks guys :).
I think its talking about the return journey so if i think about a displacement over time graph it would positive 18000 down to 0 on the return journey for displacement therefore giving displacement of -18000, and total time of 1800 seconds. Therefore average velocity for the return journey is...
Very simple question -- Average speed for a journey
Homework Statement
Tyler travels a distance (in a straight line) of 18km in 30minutes.
iii)Tyler Returns home following the same route in the same amount of time. Write down her average speed and velocity for this journey, explaining why...