Before posting convert all mass to kg, all temp to °C, and all volumes to litre or m3.
Eliminate the confusion. Convert everything before or outside the procedure.
You do not need °F, pounds or BTU in computations.
Water weighs 1 kg per litre, so you do not need to differentiate between...
The primary reason for having feathers is thermal insulation while being exposed to airflow.
Feathers also shed water, self repair by zipping back into place after a disturbance, and can grow topologically from a pore in the skin. The fact that birds can fly would be irrelevant if they did not...
How have you come to that conclusion? Are the gears you surveyed made from metal or from plastic? When correctly lubricated, metal gears will NOT wear significantly.
Higher speed spur gears will throw lubricant from the pinion. Is the lubrication by oil bath, or open and exposed, greased once...
I am confused by the poorly specified problem. Can you provide a 3D sketch of the deployed extension cover.
Can the cover be detached completely from the container? Is the cover stored inside or outside the container when not deployed. What else is then also inside the container.
A cover that...
Even if it could work, what percentage of the time does a vehicle travel at or over 130 km/h ? Is it worth carrying weight and complexity when it is used for so little time? You have plenty of time to think about that next time you are driving up a hill, or sitting in a traffic jam.
Not quite... The 500 pF variable capacitor is in parallel with a fixed 200 uH inductor.
That parallel LC circuit is tuned to resonanate at the receive frequency.
The inductor is probably also being used as the antenna.
I believe the first two transistors form a low frequency darlington pair...
Welcome to PF.
Density Functional Theory (DFT), not Discrete Fourier Transform (DFT).
https://en.wikipedia.org/wiki/Density_functional_theory
There is a list of publications here;
https://en.wikipedia.org/wiki/Density_functional_theory#Key_publications
Can you please give a link to the tidal data on the internet.
The Earth tide computed by the “Solid” software correlates remarkably well with the borehole data observed. "Solid" is used to reliably remove tidal changes from gravity surveys.
For ocean tides, the coastal profile geometry...
As current in a superconductor increases there are two limitations. The first is that there is a critical current density at which the superconductivity ceases. That is of the order of about 105 A/cm2.
The second is that the current flowing when superconductivity is suddenly lost, can generate...
The simple rule of thumb is that the beamwidth of the main lobe will be 360°/ 2Pi = 57°, divided by the width (measured in wavelengths) of the antenna, or array of elements.
Place two different diameter vertical tubes next to each other. Join them at the bottom.
Pour water into one tube and notice the water settles to the same level in the two tubes.
Resistance.
√ ( R2 + XL2 )
When you have a resistor in series with the reactance of an inductor, the total impedance is the root of the sum of the squares, because reactance is at right angles to resistance, and the impedance is the length of the hypotenuse of that right angle triangle.
https://en.wikipedia.org/wiki/Three-phase_electric_power
Or the math; https://en.wikipedia.org/wiki/Three-phase
Line voltage, V, is measured between two of the phases.
The current, I, is measured in one of the phases.
3PH Power = V * I * 1.732
So don't be surprised by a square root of three =...
Unless it is a synchronous or induction motor, when;
Synchronous RPM = 120 * Frequency in Hz / Number of poles.
Notice that the synchronous RPM is independent of the number of phases, or the voltage.
The number of poles is always even because coils make magnetic poles in N-S pairs.
Australian universities are funded by the Federal Government to educate Australian students. Those students make a co-payment, or borrow that from the Federal Government through the HECS or HELP scheme.
https://en.wikipedia.org/wiki/Tertiary_education_fees_in_Australia
A significant income was...
The “Variac” is an autotransformer, it is not an isolation transformer.
https://en.wikipedia.org/wiki/Autotransformer
Notice that a Variac offers no electrical isolation.
That is a very dangerous circuit because it is connected directly to the mains Active and Neutral, without any isolation or fuse.
If the Active is accidentally swapped with the Neutral, the chassis will become live.
If the 3uF capacitor or the dimmer fails short, the current will no longer be...
For any one frequency, series and parallel RLC circuits can always be resolved into a complex impedance.
The phasor diagram gets more complex when the excitation is not a pure sinewave. That is because R,L & C can be measured and marked with frequency independent values, but the reactance of...
The relative magnitude and phase of voltages and currents in AC systems can be represented by vectors, or phasors on a phasor diagram.
The combined impedance of RLC elements can be represented as a complex number, Z=(R+jX), which can be seen as a vector.
The simplified examples used in...
The piston will appear to be like a spring.
As you move the piston the enclosed volume will change, because the area of the piston A1, is equal to the area of the annulus A2, plus the area of the rod.
You have rediscovered the pneumatic equivalent to half of a regenerative hydraulic circuit.
You have failed to identify the application of the vacuum tank, so the leakage rate and potential for contamination cannot be assessed.
Why is the use of the vacuum confidential?