Biology

Is it true that in total a bee's venom is acidic while a wasp's venom is basic? If so, would it make sense to treat a bee sting topically with baking...

Biology

What is the amount of force in foot pounds behind the average human's...

Engineering

What is the efficiency of a typical jet engine? i.e. how much of the fuel is actually used making the plane fly and how much is wasted in the form of...

Chemistry

We have an older pop machine at work with canned soft drinks. Sometimes, when a pop is opened that comes right from the machine, the contents...

Physics

Why does a balloon travelling inside a car seem to violate Newton's laws? Imagine a toy helium balloon centrally tethered inside a window of a van...

Engineering

Electricity. It powers almost all household appliances as well as the complex electronics we rely on to execute complex programs. I am wondering...

Engineering

What will happen if we use petrol in a diesel engine or vice...

Biology

Why doesn't a person lose 9 lb when they consume 1 litre of ice water? If a calorie is the energy it takes to raise 1 cc of water 1 deg C then to...

Engineering

Why are tanks (such as scuba diving tanks, for example) always designed in a cylindrical shape? In other words, are there mechanical principles that...

Other

On average, how much petrol is burned per minute of...

Engineering

Regarding the behaviour of a high-voltage spark. I have a device which generates a pulse of high-voltage of about 20,000 volts at about two...

Engineering

Suppose a truck transporting birds is weighed. Will there be a difference in weight depending on whether or not the birds are in flight or standing...

Engineering

There are 2 routes I could take between home and work and they each take about the same amount of time to travel. One route is shorter in distance,...

Engineering

Can you help me find a simple definition of "inertial coupling" (if there is a simple definition). It's an aeronautics term. I did write to NASA a...

Engineering

Is the up and down movement of a piston in a combustion engine a waste of impulse energy? The piston has to slow down to a stop then accelerate to...

Engineering

I am interested in metal fatigue in bicycle frames. Does the steel or aluminum in a bike frame get "tired" after time? If so, how long does it take?...

Engineering

Ok, this is my project: I have put roughly two cups of rice in a sock and threw it in the microwave for four and a half minutes, it kept its warmth...

Engineering

I am in the 6th grade in Denver, Colorado. I made a machine out of 2 by 4s that will kick a ball. I want to see if air pressure in a ball has an...

Engineering

What is more efficient: to push or pull a car (front wheel vs. rear wheel...

Engineering

How do you calculate water flow rate (volume/sec) based on water pressure and hole or pipe size? And is it the same based on water pressure created...

Engineering

My son, James, and I cannot agree about the recoil of a gun. I believe that if a gun is fixed in a vice the bullet will go further than if it is...

Engineering

I have a problem with moisture in my apartment. I live in a Caribbean country and am not able to find a reasonably-priced dehumidifier. Is there any...

Engineering

If we heat a square metal page with a circle hole in the center of it, what will happen to both the square and the hole size after...

Physics

Is it true that gas particles at higher altitudes are farther away from each other than at lower altitudes, and, if this is true, does it apply to...

Engineering

How can you define the pressure of 5 g. on a person? This would be done with the fingers. I am trying to figure out how to equate 5 g into pressure...

Engineering

If one could increase the flow of air into a jet engine,would this increase the efficiency of the engine? Are all jet engines affected in the same...

Engineering

If you have a square 1 pound block with a front flat surface strike a ball, would it be the same as if you had the same weight block, but cut out in...

Physics

How can I find out whether it takes more effort (work by pump) to increase the air pressure in a tire from 60psi to 80psi if the tire is under...

Engineering

Can you tell me whether it would be possible to launch a spacecraft into orbit using a giant catapult? I can see no reason why not. Obviously any...

Engineering

I came across a "water powered clock", and it can supposedly generate power from water alone. My question is simply: How? Here is a reference to this...

Physics

What i don't understand is why the intensity of the electric field is 0 inside a charged (empty on the inside) metal sphere. I know that the...

Engineering

We are having a debate at work that we hope you can settle. The father of one of my workmates has put 18 inch wheels on his car, moving up from 16...

Engineering

Nitrous oxide when used in motorsport is often classed as "forced induction" although is it really forced induction? Does the pressure...

Engineering

I'm having a debate with a friend about the supposed benefits of filling your tires with Nitrogen gas. The major claim seems to be that N2 is less...

Engineering

Is there any `accessible` natural or man made material that contracts when electricity is...

Engineering

Who is the scientist to be attributed for equation or formula used in calculating engine exhaust back pressure? The formula for Exhaust Pressure...

Engineering

If fresh water is pressurized to 1 MPa or greater, frozen solid at this pressure, then completely thawed, will it remain pressurized? [Editors...

Engineering

I am a high school student and I have a question regarding piezoelectricity. I would like to know if a device like this is feasible: could you...