Drop Definition and 876 Threads

Hey I've been working on this pressure problem, and I am really stumped. We just started fluids, and I'm not really sure where to start. If someone could help me or point me in the right direction, that'd be great. Thanks! Heres the problem: A straight horizontal garden hose 43.0 m long...

i think i may have the solution to this problem, but something about it is still bothering me. the question is, if you have a 100W and a 60W bulb, both on the same series circuit, across which bulb will there be a greater voltage drop? if the same are on a parallel circuit?.. as i...

Egg Drop Device! I have to create an Egg Dropping Device for my Physics class using these materials: 10 straws 8 x 8 cardboard piece cellotapes (to attach the joints and nothing else!) The egg must survive a fall of about... 10 ~ 15 feet I assume... Please feel free to post...

Egg drop nned help now! I need help on this project that is due Oct 25. The project is an egg drop. The task is to design and construct a landing pad for a raw egg that will prevent the egg from breaking. The only materials we can use are 10 sheets of regualar paper, 8 straws, 1 meter of...

In science we had to build a device which, when dropped 3 stories onto cement, should not allow an egg inside inside of it to crack. One of the follow up questions says : Why should your device accelerate slightly slower than the gravitational acceleration of 9.8 m/s/s " - I can't understand why...

another fun Ap phyiscs problem..short as usual: In one run of the oil drop experiment a 20 mg drop was suspended between parallel plates 1.5 cm apart when the potential difference was 300 V. Compute the number of excess electronic charges on the drop. is this just saying "compute the oil...

rock is dropped from cliff. it is heard hitting the ocean 3.00s later, if speed of sound is 340m/s, how high is the cliff? im so stuck

I am helping my son with the following: Egg Drop Competition Design a package to hold an egg during a 6' drop without breakage. Score is based on how close to the target the package lands and tie will be decided by lightest package. The Competition: 1. All pre-constructed...

I was reading a physics book the other day that said that rain drops were inner tube shaped and they showed a picture my advanced phys teacher said that is false because they are tear drop shaped and if you probe it. ie look for its shape, vel, pos. you will alter it that is why it looks like a...

Hi, i was wondering if anybody can help me with the following problem: A plate drops onto a smooth floor and shatters into 3 pieces of equal mass. 2 of the pieces go off with equal speeds v at right angles to one another. How do I find the speed and direction of the third piece? I know...

1. What is the force that makes an airplane/SR-71 compress as it goes faster? Is this same force what gravity is? Does the counter clockwise spin of the Earth create gravity? If we spun faster would gravity be greater? If we stopped spinning would the Earth expand like a fish being pulled up...

I'd like to construct a fast-reacting current overload protection device. And rather than use a FET as a short to blow a fuse I'd rather just use a semiconductor in series that I can open on overload. This is similar in operation to some "intelligent circuit breakers" based on a Intra...

One-off: "Black drop" problem an SR effect? From a Reuters science article (http://story.news.yahoo.com/news?tmpl=story&cid=585&e=1&u=/nm/20040511/sc_nm/space_venus_dc ) This sounds like something one would want to explain through SR - perhaps GR. Any comments from anyone?

as this article points out Bushco is well on their way to fumbling the ball. see here: http://observer.guardian.co.uk/print/0,3858,4864237-102275,00.html :eek:

Can anyone suggest a site where I can get a crash course in air flow? What I am looking for is pressure drop verses various volumes, speed, duct size, shape, etc. I have spent over an hour searching the net, but haven't had any luck. Thanks.

When a volt meter is placed in a circuit on its own the reading is say 4v. But when a component, 'x', is placed in parallel the voltage drops. Why is this?? Physman

any suggestions on this lab? dropped from i guess 3 stories up and the vehicle must be around 50 grams. no parachutes or padding either.

I need help find a good page which talks about the physics of a tranformer. I know all about the b fields and the flux and the ratio of the windings but what I really need is the practical formulea and methods for example calculating the voltage drop on the primary if the secondary has...

I don't get it, Dick Gephardy was well loved and seemingly a great leader. I understand why he thought that if he did so poorly in Iowa that he'd do much worse elsewhere and dropped out of the presidential race, but why wouldn't someone like that attempt some other office?

We recently did a lab where we were given an animation of the oil drop experiment, and we were supposed to find the velocity of the droplet when Fg and FQ were in the same direction (v1) and when Fg and FQ were in opposite directions (v2)... Then we found (v1 - v2) and were told to analyze and...

If I drop a key... Dear friends! I'm new here but have read a lot of inforamtion and books about GR. However I struggle as much as all others to get a picture of the specetime. I will challenge you - not with a question but with an invitation - who tell the best story that explains why my...

Hey i really need some help on this one. I am working on a physics project. It is the old "egg drop project." I need some help and advice. How do you recommend suspending the egg and keeping it safe while in a diamond shaped cage. The only catch is you can only use 40 straws, 10 rubber...

I have a younger cousin who needs suggestions for an egg drop project. He will be dropping an egg from a certain distance (not sure how high, but not too high), and he has to build a device that will prevent it from breaking. The requirements are that there are no parachutes, it cannot be...

http://www.oregonlive.com/enter/index.ssf?/science/oregonian/index.ssf%3f/base/science/1062590337326170.xml

if an 450lb cart has 16 inches of travel and is fully extended under its own weight, it sinks 3 inches with me, 125 lbs addition, can this info get a spring constant and a drop height where the springs would bottom out with me in it? if any other info is needed, assume the best case dealy-bob...

if I drop a vibrating 440 Hz tuning fork down the elevator shaft of a tall building and when I hear a freq. of 400 Hz, is it possible to determine how far has the tuning fork fallen? My friend said yes but I think no. Am i right?