Depending on what you're using this division for, you may want to finish up with a quotient that's a whole number, with a remainder, i.e. an indication of how much is left over after you've completed your division.  In the example, the remainder would be 4, because 6 cannot go into four, and there are no more digits to bring down. Place your remainder after the quotient with a letter "r" before it. In the example, the answer would be expressed as "41 r4." You would stop here if you were trying to calculate something that would not make sense to express in partial units, for example, if you were trying to determine how many cars were needed to move a certain number of people. In a case such as this, it would not be useful think about things in terms of partial cars or partial people. If you plan to calculate a decimal, you can skip this step. If you are planning to calculate a precise answer rather than one with a remainder, you'll now need to move beyond whole numbers. When you've reached a point at which you are left with a number smaller than your divisor, add a decimal point to both the quotient and the dividend. In the example, since 250 is a whole number, every digit after the decimal will be 0, making it 250.000. Now you have more digits that can be brought down (all of them zeroes). Bring down a zero and continue as before, determining how many times the divisor can go into the new number. In the example, determine how many times 6 can go into 40. Add that number (6) to the quotient above the dividend and after the decimal point. Then multiply 6 by 6, and subtract the result from 40. You should end up with 4 again. In some cases, you will find that when you start to solve for the decimal, the answer repeats over and over. At this point, it's time to stop and round your answer up (if the repeating number is 5 or greater) or down (if it is 4 or less).  In the example, you could keep getting 4 out of 40-36 forever, and add 6's to your quotient indefinitely. Instead of doing this, stop the problem and round the quotient. Because 6 is greater than (or equal to) 5, you would round up to 41.67. Alternatively, you can indicate a repeating decimal by placing a small horizontal line over the repeating digit. In the example, this would make the quotient 41.6, with a line over the 6. If you are working with units like pounds, gallons, or degrees, once you are done with all your calculations, add the unit to the end of your answer.  If you added a zero as a place-holder at the beginning, you should erase that now as well. In the example, because you asked how much each mushroom in a 250-gram pack of 6 weighs, you'll need to put your answer into grams. Therefore, your final answer is 41.67 grams.
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One-sentence summary -- Record the remainder. Add a decimal point. Keep repeating. Stop and round. Add the unit back to your answer.


The pitch of a theremin is controlled by creating a circuit between a variable oscillator and a reference oscillator, which should be available at specialty electronics stores as individual units. Each should be tuned to the same frequency, ideally in the middle of the low frequency radio range.  The pitch-reference oscillator should work around 172kHz, used in conjunction with a 10k potentiometer. The signal this oscillator creates should be fed into the mixer with screened cable. The pitch-variable oscillator should also work around 172khz, and will be affected by the stray capacitance of the reference unit. Potentiometers need to be wired into the circuit to make the relationship of your hand movement to the change in pitch more linear. Without them, the instrument's pitch be almost impossible to control, changing wildly with only a microscopic movement of the hand. Using screened cable, wire the circuit of the pitch control components into the antenna when you're finished. When playing the theremin, your hand changes the capacitance of the antenna, which will change the frequency of the variable oscillator. Essentially, you're sending the signal into the antenna to be manipulated manually. This should also be in the low frequency radio range and carefully tuned, operating somewhere in the neighborhood of 441kHz. This signal will be influenced directly by the volume antenna, manipulating it by hand. A 10k trim potentiometer needs to be installed to enable the operator to tune the theremin appropriately.  Send the output of this variable oscillator into a volume resonant circuit. The output will be a DC voltage that varies according to the output of the variable oscillator.  Tuned correctly, the oscillator frequency will match the tuning of the volume-resonant circuit as the operator's hand approaches the antenna, causing the signal to cut off gradually. In other words, the closer the hand to the antenna, the quieter the sound. The purpose of the mixer is to compare the frequency of the variable oscillator with the reference frequency. The output will be an audio signal between 20Hz and 20kHz. Assembling the mixer is the simplest step in the process. Fed with two slightly different frequencies from the oscillators, the mixer will produce an output with a complex waveform, giving it the distinctive warble we associate with the sci-fi sound of the theremin. The output actually contains two distinct frequencies, which require the need of a low pass filter, that is two 0.0047uF capacitors and a 1k resistor, used to extract the output and boost it into a listenable range. Route the outputs of the mixer and the volume resonant circuit into a voltage-controlled amplifier. The voltage from the volume resonant circuit changes the amplitude of the audio signal from the mixer, helping to boost the sound and control the volume of the instrument.
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One-sentence summary -- Connect the pitch control. Connect the variable oscillator to the pitch antenna. Connect a variable oscillator to the volume antenna. Feed the output of each oscillator into a mixer. Route the signal from the mixer into an amplifier.


The spindle itself is not very deep; as a result, this tool will easily come out when putting a lot of torque on the wrench to remove the bottom bracket. Be careful not to strip the splines or threads of the bottom bracket. These parts are threaded differently, and will require some trial and error to figure out which side the lock ring is on. The lock ring will be threaded normally, and will most likely unscrew somewhat easily (relative to the other side).
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One-sentence summary --
Fit the bottom bracket tool over the bottom bracket spindle. The ISIS bottom bracket style has two parts, the lock ring cup and the main bottom bracket. Pick a side and turn counter-clockwise until the cup is removed. Once the cup is removed off of the spindle, turn the frame over and remove the bottom bracket itself, by turning clockwise.