In physics, a fluid is a liquid or gas or other material that continually deforms (flows) under an applied shear stress, or external force. They have zero shear modulus, or, in simpler terms, are substances which cannot resist any shear force applied to them.
Liquids form a free surface (that is, a surface not created by the container) while gases do not.
Although the term "fluid" generally includes both the liquid and gas phases, its definition varies among branches. Definition of "solid" vary as well, and depending on field, some substances can be both "fluid" and "solid". Viscoelastic fluids like Silly Putty appear to behave similar to a solid when a sudden force is applied. Also substances with a very high viscosity such as pitch appear to behave like a solid (see pitch drop experiment). In particle physics, the concept is extended to include fluidic matters other than liquids or gases. "Fluid" in medicine and biology specifically means any liquid constituent of the body (body fluid), whereas "liquid" is not used in this sense. Sometimes liquids to be taken for fluid replacement, either by drinking or by injection, are also called "fluid" ("drink plenty of fluids"). In hydraulics, "fluid" is a term which refers to liquids of certain properties, and is a broader concept than "(hydraulic) oils".
Hi, i have a quick question regarding the above subject.
If
F(b) = (rho) (V) (9.8)
and F(b) = F(g)
and F(g) = (m) (9.8)
then wouldn't F(b) = (m) (9.8)
?
Ok, I got this scuba diver and he has a tank that is 0.015 meters cubed and filled with compressed air at an absolute pressure of 2.02e7 Pa. Assuming air is consumed at a rate of 0.03 meters cubed per minute and the temperature is constant, how long can this diver stay under water at a depth of...
16. The normal atmosphercic pressure is 1.013 x 10^5. A storm causes that the height of the barometer of mercury reduce 20.0 mm form the normal height. What is the atmosferic preasurre ? ( the density of mercury is 13.59 g/cm3
50. Out of a fire extingisher comes out water under air...
I could use some help on what formula or combination of formulas I am missing.
An iron (p = 7860 kg/m3) cube measuring 15.4 cm on a side is suspended from a wire. Find the tension in the wire when the block is completely submerged in water (p = 1000 kg/m3). The answer is 246 N
1) I have...
Need some assistance on what I am missing
"A tank contains mercury, whose density is 13 600 kg/m3. Find the force exerted by the mercury on a circular plug at the bottom of the tank. The plug has a diameter of 2.54 cm, and is located 37.6 cm below the surface of the mercury". The answer is...
A ship, carrying freshwater to a desert island in the Caribbean, has a horizontal cross-sectional area of 3000 m^2 at the waterline. When unloaded, the ship rises 8.21 m higher in the sea. How much water was delivered?
A pump and its horizontal intake pipe are located 11.5 m beneath the surface of a reservoir. The speed of the water in the intake pipe causes the pressure there to decrease, in accord with Bernoulli's principle. Assuming nonviscous flow, what is the maximum speed with which water can flow...
Hi,
I am Tsering and am studying in the Mahindra UWC of India. I am doing a physics extended essay on How the cross section area of an object(cylinder) will affect the rate of slowing down of the object when dropped from a certain height into a fluid (water in my case). I will try to find the...
I'm currently in the process of an extended experimental investigation for senior physics, and having some problems utilising my results and relating them to any kind of theory.
Here's my sob story:
My partner and I were initially going to experiment with capillary tubes (eg. Poiseuille's...
Hello everyone,
I have a question that pertains to the physics of fluids and how the pressure of which changes in different given containers, which contains water. Basically, here is what I’m trying to do:
The shape of the container is that defined by a the function:
f(x) = \frac{5}{8} x...
Hello everyone,
I have a question that pertains to the physics of fluids and how the pressure of which changes in different given containers, which contains water. Basically, here is what I’m trying to do:
The shape of the container is that defined by a the function:
f(x) = \frac{5}{8} x...
I have these two fluids problems and I can't get either one (they are related). Can anyone point me in the right direction?
1. A 3.05 kg piece of wood (SG = 0.500)) floats on water. What minimum mass of copper, hung from it by a string, will cause it to sink?
2. A 3.25 kg piece of wood (SG...
Hi,
I have two problems that I'm stuck on. Not really sure how to get the answer/what equation to use. Can someone help me?
1) The blood speed in a normal segment of a horizontal artery is 0.13 m/s. An abnormal segment of the artery is narrowed down by an arteriosclerotic plaque to 1/4...
A problem states that a man with a mass of 55 kg floats with 90% of his body under water.
I jus need to find the weight of his body when submerged in water...i'm was thinking 90% of 55 kg, but i wasn't sure if that was correct...
What's the difference between a fluid's flow rate and flow speed? I use the continuity equation to get the flow speed I thought but I couldn't think of how to get the rate. Here's the exact question if you want that for reference:
A liquid of density equal to 1.85 g/cm^3 flows through two...
A tank of large area is filled with water to a depth of 0.6m. A hole of 6m^2 cross section in the bottom allows water to drain out in a continuous stream. What is the rate at which water flows out the tank in m^3/s?
This is how I figure the problem should be solved:
Q=...
Some of the problems, I really don't know how to even set up the problem. I don't want an answer for them, but I need an idea where to start.
1. Gauge pressure in both tires = 690 kPa.
Bike and the riders mass = 90.0 kg.
Find area of contact of each tire with the ground if each tire...
Keep in mind I have not studied fluid dynamics or plasma stuff at all...
Now, both gases and liquids are fluids. Is a plasma an ionised gas, or an ionised fluid? The reason I ask is because the big difference between the gas and liquid forms of various things is the amount of energy. Is...