billrussell42

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Retired engineer with 40 years of experience in different engineering fields. System design, analog design, digital design, software design, webmaster. Longtime VW owner. Longtime Macintosh owner.

發問 0 回答 327

2017-12-09 1:22 am

help i have a math test in 43 minstues and i dont know the quadratic formula but i cant ogogole it because i dont have internet pls heelllp?

2017-11-28 10:13 pm

: 1.0×10^−15/4.2×10^−7 Express the answer in scientific notation, □×10□, using two significant figures.?

2017-11-23 3:04 pm

Evaporation / transpiration ?

2017-11-22 2:42 am

A standard deck of cards contains 52 cards. One card is selected from the deck. Help! .?

2017-11-22 12:49 am

What do these variable stand for?

2017-11-21 11:54 pm

A certain isotope decays from 80 grams to 2.5 grams in 34 days. What is the half life of this isotope?

2017-11-17 2:19 am

Flat Earthers,please help me understand what I saw.?

2017-11-10 11:14 pm

I had my colonoscopy yesterday,it went fine,all miss well.I know its a head thing but I still have the taste of the prep in my mouth.?

2017-11-10 7:53 pm

what percent is 500 million to 7 billion?

2017-11-07 9:46 am

If I have a mass, a starting temperature, and an ending temperature, how do I calculate the change in energy (delta E)?

2017-10-29 7:13 am

I'm scheduled for a colonoscopy and I'm nervous about drinking the prep,any suggestions.?

2017-10-22 6:05 pm

Is time travel possible and if so why have no future time astronauts left their mark for us here in the 20th century ?

2017-10-21 3:47 pm

Can we increase speed of electron in order to increase electric current in a particular substance(assuming it allows electricity to pass)?

2017-10-18 10:29 pm

help with math word problem?

2017-10-18 8:43 am

Mercury has a radius of about 0.38 Earth radius and a mass of only 0.055 Earth mass. Estimate the acceleration due to.gravity on mercury?

2017-10-13 7:41 pm

If the Earth is flat, does that mean we can put engines on it and fly it around space like a big dumb Frisbee?

2017-10-08 11:36 pm

How do I solve this math problem?

2014-03-01 10:46 pm

a gear that changes different rpm?

2013-11-04 2:51 pm

What is the length of the hypotenuse?

2013-10-07 3:14 pm

Can anyone tell 4 letter English words that end in "eat"?

2013-10-01 7:35 pm

Maths questions on recurring decimals?

2013-09-02 3:10 pm

Pls help me with these physics problems?? elaborate and explain...Thankyou!!?

2013-08-31 2:20 pm

Are there any ways that can be used to detect styrene from polystyrene?

2013-01-26 1:10 pm

doubt about effect of buoyancy?

2012-12-18 1:36 am

Would this type of thermometer work for measuring liquids?

2012-11-17 3:36 pm

how much charge would need to flow...?

2012-06-25 8:56 pm

In the figure, if C1=C2=2C3= 28.7 uF, how much charge is stored on each capacitor when V=47.0 V?

2012-05-01 2:55 am

Physics HELP!.............?

2011-11-16 12:00 am

The difference between 0v and Neutral in an electrical/electronic circuit?

2011-07-13 7:23 pm

Consider a window the shape of which is a rectangle of?

2011-07-13 5:47 pm

Consider a window the shape of which is a rectangle of height?

2010-09-25 10:55 am

What if a compass is placed at the northernmost place on Earth?

2010-08-24 8:45 am

how to test transistor?

2010-08-06 8:19 pm

what does bandwidth mean in oscilloscopes?

2010-07-28 3:53 pm

(c - 3)square = csquare + kc + 9. what is the value of k?

2010-06-22 4:31 am

what type of Potentiometer has 12 pins and is labeled 100kE?

2010-06-21 6:59 pm

How does wattage work? Is it per hour? Per Day? Per minute?

2010-06-21 7:00 pm

how to check terminals of a transistor?

2010-06-16 4:13 pm

2 resistor ratios of 5ohm and 10ohm are connected first in series, then in parallel.find ratio of heat & power?

2010-06-16 6:55 pm

Can anybody help me with the calculation and explanation of how the circuit works i need it for my thesis?

2010-06-16 2:14 am

How do you know which way electrons flow in a Voltaic Cell?

2010-06-15 7:03 pm

Raise amps lower volts or raise both?

2010-06-15 6:24 pm

What is a latching circuit?

2010-06-15 6:50 pm

trying to make LM386 work with different capacitors?

2010-06-15 4:16 pm

if 30% of a solution equals 5L, how many L of water do you add to make it 20% of the solution?

2010-06-15 3:14 pm

An inductor is also an coil n a resistor is also a coil....then how it perfprms different action? why inductor?

2010-06-14 8:02 pm

how to use lm386 amplifier?

2010-06-13 5:08 pm

Series pass voltage regulator circuit anyone?

2010-06-13 7:41 am

what is the storage capacity of a high-density 3.5' disk?

2010-06-13 12:54 am

What happens when you microwave grapes?

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