Bird Definition and 124 Threads

Homework Statement Is it possible for a bird to fly in a cage with a constant horizontal velocity when there is an acceleration acting in the vertically downward direction. Homework Equations The Attempt at a Solution

Please take the time to debunk this guy's video: He is claiming that because the bird in frame goes through the frame very quickly, that it is traveling faster than the plane in the background. He is failing to recognize that the bird is much closer than the plane. Another respondent...

Homework Statement speed of man=120m/h angle of bird flight with ground=60 degrees.Homework Equations A man on the ground sees a bird flying at angle of 60 degrees with horizontal.He started running at 120m/hour,is able to stay directly below the bird.What's bird speed? The Attempt at a...

Hi friends, Plz. point me how to find the following: A man on the ground sees a bird flying at angle of 60 degrees with horizontal.He started running at 120m/hour,is able to stay directly below the bird.What's bird speed? Thanks in advance.

Every once in a while I see the bird brain searching the forums. This is going to be a log: Saturday, November 25: 2:44 P.M. http://img157.imageshack.us/img157/8903/evil20eyenm2.jpg ...I see you.

Identify the bird! Okay,,so we will post the pic of bird which we see around and the others will identify it...So i saw this bird but i can't identify it...i hope you can:smile:

I'm sure there's already a thread about how else to solve the famous problem re: the distance covered by a bird flying between two trains on a collision course (other than adding up the sums, of course), but I can't find it. Can anyone give me a quick link? Thanks!

Hey. I've done this question, but my answer is only partly correct according to the answer book. Heres the question: "To a bird flying at 20km/h on a bearing of 160 degrees, the wind seems to be coming from the south at 25km/h. Find the true velocity of the wind" ok. I said that B is the...

Hi, I'm new here. I thought this might be fun to discuss. http://video.google.com/videoplay?docid=7763715434502216539&q=Randy+Johnson" I need help on this one. We've got to consider the speed of the ball, which should be on record somewhere, or we can estimate it based on Randy's...

I think this is very serious, Africa is underddveloped, the people are lowly educated and might not be serious to fight H5N1, a pendemic is pending! What WHO can do to stop it?:devil:

Is it just me, or is Bush's timing on sounding Bird Flu alarms a little coincidental? "Bait and switch" and "distraction" and "Politics of fear" and "plummeting approval" all come to mind. http://www.islandpacket.com/24hour/front/story/2861218p-11522755c.html Good God. Could the...

You can bet this has been posted before, but I didn't see any threads. If not we can discuss it here. I am wondering about this, it looks bad but is it?

This story is a few years old but it came up on a PBS NOVA and seemed worth revisiting. http://news.nationalgeographic.com/news/2002/08/0808_020808_crow.html

Pelicans tuck their wings and free-fall straight down when diving for fish. Suppose a pelican starts its dive from a height of 16 m and cannot change its path once committed. If it takes a fish .20 s to perform evasice action, at what minimum height must it spot the pelican to escape? Assume the...

This really scared me: http://www.agi.it/english/news.pl?doc=200509121413-1097-RT1-CRO-0-NF11&page=0&id=agionline-eng.oggitalia What do you think? Is it going to be really that dreadful? Or is this just their way of making people realize the gravity of the situation? Italy is a rich...

I came across this question while looking around the forums at physlink.com: There are birds of mass 20 tonnes in a van of mass 10 tonnes. The back of the van is closed(no air can go in or come out). If now the birds start flying, will the weight of the van decrease? I ask this question...

Hi! I am having trouble with this question: You are trying to photograph a bird sitting on a tree branch, but a tall hedge is blocking your view. However, as the drawing shows, a plane mirror reflects light from the bird into your camera. If x = 4.3 m and y = 4.5 m in the drawing, for what...

Belongs in a 'nature' forum, but this is as close as it gets. Why do some birds (pigeons, starlings) bob their heads (front and back) when they walk? I have two hypotheses: 1] They have lower retinal retentiveness, and must hold an image on their eye longer to resolve it. They move their...

I have it figured out how to make a car that is powered by a bird. First, it must be lightweight. Second, get a small cage (covered by a cloth with a string that you can pull to remove the cloth) and put a mouse in it and attach the cage to a pole and the pole to the end of car in the...

Plz help me w/ this problem...thanks Two trains, each hav ing a speed of 30 km/h, are headed at each other on the same straight track. A bird that can fly 60km/h flies off the front of one train when they r 60km apart and heads directly for the other train. On reaching the other train it...

If a plane is flying along and inside the plane there is a little bird flapping away flying from front to back in the plane. Does the plane weigh anymore because the bird is inside it :confused: ?

I think I better start a new thread on this topic. :wink: http://www.cnn.com/2004/WORLD/asiapcf/02/04/birdflu.update/index.html This link provides us with quite updated information about the outbreak of bird flu. Although many regions in south-east asia have loads of chickens died of H5N1...

Hello! New here. Interested in the geometry of the V formation by migrating birds. The apparent physics of the thing is that the displacement of air caused by the lead birds hepls to pull along the more spent birds at the rear of the formation - thus creating an energy flow. As an energy...

if a humming bird is hovering in a car going at a constant rate, and the car comes to a sudden stop, will the bird fly into the windsheild?