Recent content by Harry Hazard

W_{b}= \int Pdv where pressure is constant and dv is the change in volume. The volume goes from .01m^3 to .824m^3. This will give you the work done BY the system if it was in a piston cylinder device. To computer the work required to vaporize 1kg of water, simply multiply the the heat...

I think you would first have to determine the cofficent of friction between the two bars. The formula is FF=FN*CF, where FF is the force of friction (100lbs in this example); FN is the normal force made by the springs and CF is the coefficient of friction. I don't know of a way to get CF...

Oops! I misread that. :D You measure the voltage between two opposite points, let's say "North" and "South" if your bridge has the diamond configuration. And you apply a voltage from "West" to "East". On the South bridge, you have two known resistors. On the North, you have one known resistor...

Since you said your strain "number" is correct and your "sign" is wrong, my first guess is to check your resistance to strain formula. Classically, this would be (R_strained-R_original)/(R/original*Gage Factor). Reversing the R_original and R_strained in the numerator would produce the...

Hello and welcome to PF Sageese. I'm new here too, but maybe I can help you out. Lets start with a little more information about what your trying to accomplish like: What are you trying to handle? and how are you wanting to handle it? Is this similar to a conveyor or a robotic arm...

What have you tried?

1. y(position)=y0+(v0)*t-1/2*g*t^2 where y0 is the heights of the arrow before its shot v0 is the velocity of the arrow before its shot and t is the time at which you wish to know the y(position) 2. Add gravity to the acceleration of of the copter. 3. Its the same as 2, but at an...

Load cells are "premade" strain gates, except they cost slot more because they are trade certified.

ABB robotics makes robotic arms controlled by electric motors. Quickly scanning their website, I saw that their largest robotic arm can support about 500kg. Exavators on constructon sites can support weights many times that and they use hydraulics.

Continuing what story645 said, you can include Background - a brief history of computers, and a description of typical use Fundamentals - equations or thories that govern the computers, such as electicity or binary code. Careful with this section, computers are complex and you can quickly...

You are indeed in a pickle. I've never seen an uncertainty analysis like this. Do you know the resolution of the measuring devices? The resolution is the "smallest marking " on your measuring device. For example: Most rulers have 1/16th of an inch as the smallest mark, therefore the...

Very similar to your other https://www.physicsforums.com/showthread.php?t=383183". Assign some distance, say 1 meter, between the blocks, then use that to measure the total length of the rope. Then move the block to 2 meters apart and remeasure the total distance of the rope. How much did...

Consider this. Imagine the distance between the pulley and Block C is 1 meter. The distance of the rope is 2 meters since it travels "down and back" from Block C. So, now let's move the pulley 2 meters away from Block C. Now the rope travels down 2 meters to the pulley and back 2 meters...

Our Freshmen engineering classes use a "Boe-Bot" to learn about mechanization controls. They have a education kit I suggest you look into. It performs "a lot" like an ROV and cost several times less. More information...

I'm not sure about the standards, but a large single hole or several smaller ones should produce about the same result. Bernoulli's principle tells us that as the flow area decreases (at the orifice), the velocity increases and the pressure decreases, assuming the fluid is incompressible. If...