So I have a load cell that outputs a + and - signal in the range of 0 to 30 mV depending on the force applied. I fed the +signal through a non-inverting amplifier that bumps up its value to about 4 V. However, when I applied force onto the load cell, the voltage range did not get amplified. The...
The typical sine wave y = sin(x) has its center line as y = 0. Is there any equation I can represent a sine wave that has a center line as a curve? Something like the edge of the cookie cutter:
http://www.pmeartsandcrafts.com/4010-16826-large/round--wavy-edge-cutters-xxxl.jpg
I am absolutely stoned by this equation. I've looked through all the trig identities and the only one that comes close to be used in here is sin2u = 2sin(u)cos(u), but there is that lamba... Any suggestions?
It's a sphere with radius R immersed in water of velocity V. I'm asked to calculate the drag on it. I know the formula for drag is integral of Pcos theta dA + integral of shear stress sin theta dA . And I am not given any information regarding the shear stress, so I thought since the Re is...
I have this flow with Reynold's number in the 10^5, which I think it's big enough to treat the fluid as inviscid, does this also mean I can assume the shear stress is negligible?
I just heard from someone that is the bubble rises infinitely slow to the surface, then the process is isothermal because it doesn't have time to exchange heat with the water surrounding it in order to maintain a constant temperature within. But in real life, in which air bubbles rise quickly to...
There is an air bubble at a certain depth and it's rising to the surface of the water. The temperature of the water is constant at a certain temperature. The gas inside the bubble expands as it rises to the surface, but does the temperature of the air stay the same? Is this an isothermal or...
Efficiency is essentially the ratio of what you get to what you put in. COP also seems to represents the same thing (i.e. COP of a refrigerator is Ql / W, which is the amount of heat removed / the amount of work done to remove it). I know efficiency cannot exceed 1, but how come COP can have...
I am confused about the entropy change for reversible and irreversible cycles. I know entropy is a state function, so for cycles, the entropy change within the system should be 0, since the process ends up in the same state as the beginning. So does this mean that the entropy change for the...
I'm really interested in entering the field of nanotechnology in the future. I'm currently a senior in the process of college application, and I know I won't be touching nanotech until I'm in graduate school. I need advice on the specific major that I need to be in in order to work in nanotech...