I am going through old exam questions about pressure and fluid dynamics.
For one particular question I had to calculate the change in pressure in a system. These two equations were given on the formula sheet:
ΔP=\frac{4\gamma}{R}
and
ΔP=\frac{2\gamma}{R}
I've never seen the...
If moving cos, sin or tan from one side of an equation to the over you must always take the inverse of it, if that's what you mean. I think I get "Math Error" because my opposite value is larger than my hypotenuse value. Which seems illogical. However I don't see any other value each of these...
Homework Statement
A cart of mass 357g is sent traveling down a frictionless sloped track.
It's acceleration is 1.65ms-2.
1. Draw a labelled free body diagram of the cart while it is accelerating down the track.
2. Using Newton's second law, calculate the slope of the track.
Homework...
Homework Statement A capacitor is charged by connecting it to a suitable battery.
(a) Does the amount of energy stored in the capacitor increase, decrease, or remain the same if a dielectric is inserted while the capacitor is connected to the battery? Explain your answer.
(b) Does the amount...
Homework Statement
QUESTION
A cancer patient is typically given an intravenous dose of Metastron with an activity of
148 MBq.
Calculate the activity after 6 months (183 days).
PREVIOUS INFORMATION
Physical half-life of Metastron = 50.5 days
Biological half-life of Metastron =...
Homework Statement
Calculate the difference in pressure (in atmospheres) that the blood vessels in a giraffe's head have to accommodate as the head is lowered from a full upright position to ground level for a drink. The height of an average giraffe is about 6m.
(Note I'm currently only...
Homework Statement
Intravenous infusions are often made under gravity. Assuming the fluid has a density of 1.00g/cm^3, at what height h should the bottle be placed so the liquid pressure is 55mm-Hg?
Homework Equations
Atmospheric pressure, Po, = 101kPa = 101000Pa
density of fluid, ρ...
Homework Statement
When blood pressure is measured, why must the jacket be held at the level of the heart?
I don't quite understand the answer given.
The Attempt at a Solution
It's obvious that if the the height changes the pressure reading will change due to P=ρgΔh, thus giving a...
Homework Statement
A bird of mass 0.5kg dives and then pulls out of the dive by flying in a portion of a vertical circle of radius 15m. At the bottom of the arc the birds speed is 25m/s.
a) What is the magnitude of the net vertical force acting on the bird?
b) What is the magnitude of the...