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How bullet proof is 7 inches of steel

Can you penetrate a 7 inch steel bunker re-enforced with steel I beams with an ac130? Or any other bomb other than nuclear bombs-Yes.It doesnt matter what the airplane is (and if you mean something ot

Y"-6y'+9y=2 with y(0)=y'(0)=0

solve using Laplace transforms only. we are not supposed to use partial fractions (if applicable)-Have a look at this example: http://www.sosmath.com/diffeq/laplace/ap… Lets go through the procedure

2 x 3 ( to the power of 3)

Im not sure how to do this!-if the question is asking: 2x3^3 you multiply 3 by its self 3 times so 3x3=9x3=27 the you multiply 2x27=54 if the question is (2x3)^3 then you do parenthesis first you 2x

What are the two type of resistance for AC and DC

In the___________biased condition, there are two types of resistance, __________for DC and _________ for AC.-In the reverse biased condition;for DC, diode shows static resistance andfor AC, diode show

What does a 110 wall outlet ohm out at

It was controlled with a 15A breaker,therefore its resistance can be assumed 110V / 15A = 7.3 ohm-Previous answer is for DC, not AC. Also, one can easily see that a socket could supply a lot more curr

Why do we not build stuff like we did long ago

I was watching our local news this morning, and they were showing a place called Little Norway. They showed what it was like when Norwegians first immigrated to our state. The churches and homes were

If the anode voltage is exactly equal to the cathode voltage, it is an indication of what kind of diode

Shorted-Its a solid state diode.A vaccum tube diode will, when its filament is energized, prioduce a thermionic voltage between the cathode and anode.-That could be ANY diode, regardless of kind. Any

Fluid Mechanics: Super-critical flow

What is the most effective way to make an sub-critical open-channel flow switch to super-critical?-Put a sluice gate in the channel.Fluid upstream of the gate will pile up, building significant pressu

What's an impedance for TTL and CMOS logics

I cant find an answer for this question and I am not sure if impedance is the same as resistance.-Its not something you ever need, or is specified by the manufacturer. Take TTL, which comes on about

A large pipe can fill a tank in 24 minutes less then it takes a smaller pipe to fill the same tank.

Working together, both pipes can fill the tank in 16min. How long would it take the larger pipe working alone to fill the tank?-If the large pipe fills in X minutes then the fill rate is 1/X per minut

How can you produce different electric wave forms for experiments

What kind of device do you need to produce a variety of electric wave forms for different experiments, such as a rectangular biphasic square wave, a sinewave, or a sawtooth wave?-This is usually calle

What is the conversion of TR to kW of Cooling

1 ton of Refrigeration is equal to 3.52 kilowatts of cooling 1 TR = 3.52 kW

How Do Water Heaters Work

I am just beginning to wonder the specifics of how normal water-heaters function in a house hold. I do not know much about them, I think ours holds 140 gallons, and is gas. How does it heat all of the

What is the BIGDOG robot from Boston

BigDog is a dynamically stable quadruped robot created in 2005 by Boston Dynamics with Foster-Miller, the NASA Jet Propulsion Laboratory, and the Harvard University Concord Field Station.BigDog is 3 f

Higher voltage = lower energy loss

Power companies send electricity at extremely high voltages because lower current means less energy lost.But heres the thing I dont get about that.Lets say (100% hypothetical numbers here, dont fixate
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