Ground Definition and 921 Threads

Relative Motion - I need help on it and more help I need help on Relative Motion. I'm about to literally pull my hair out if I don't understand how to do this. I would very appreciate it if someone could help me out with this one problem and I probably could do the other by myself. The pilot...

I have some problems with the following question: Deduce what terms may arise from the ground state configurations of the atoms of elements of Period 2 and suggest the order of their energies using Hund´s rules. Deduce what terms may arise... Do they mean to which terms the atoms can be...

Hi, I got a few questions on ground effect : 1. When a plane lands, there is a period of ground effect, when the plane is less than 10 feet above the ground and the flight is very smooth. Can someone remind me why it is so smooth? 2. Does ground effect have any effect on regular or race...

HOw can an egg fall from a high placeto the ground without breaking?

The cross-section of a tunnel is a circular arc. The maximum height of the tunnel is 10 (units). A vertical strut 9 (units) high supports the roof of the tunnel from a point 27 (units) along the ground from the side. Calculate the width of the tunnel at ground level. Please help me solve...

Who play these games? Good or not?

Ok, classic old question. Two tennis balls dropped from a very high height. One normal, one filled with lead, for example. So what will hit first? I am certain that they will hit together (theoretically) by looking at the equation v = u + at so no mention of weight or mass. However...

Does Light have a "Ground State"? Light when it gains or loses energy, increases or decreases its oscillation rate, and shortens or lengthens its wave length (respectively). Do anyone find it hard to imagine just how fast and short light was circa big bang? Is it possible, given enough time...

Has anyone ever heard of this place? I live about 30 minutes from its location and I'm trying to plan a camping trip there sometime this summer. Anyhow, a bit of the legend. The area is in a forest, in Chatham County, NC. The particular "tramping" area is a 40 ft circle in the midst of...

Just curios. Why do the electrical outlets in my home have a positive, negative, and a ground? With circuits that I am familiar with, if you have a positive and a negative connected, there is no need for a ground. Does anyone have an explanation? Pan

Problem 9. If a ball is thrown vertically upward on the planet Zeno at 100m/s, then it's approximate height in meters t seconds later is given by h(t)=45t-9t^2. a.After how many seconds does the ball hit the ground? b. How high does the ball go?

Hi, I have to do a report on ground level ozone and was just wondering if that is just another word for smog. Also, I need help in answering the following questions: b) What are mechanisms of the reactions that lead to the production of ground level ozone? c) What is the connection between...

Anybody know why electric charge is attracted to the Earth (ground) ?

I would like to ask the following question about Physics. Question: An object is dropped from a height of 50 m above ground from a helicopter. How long does the object take to reach the ground and what is its velocity on landing if the helicopter (a) is at rest, (b) is ascending with a...

Ok, I am currently taking chemistry, and the course involves some aspects of quantum physiscs, such as bohr models, quarks, and orbitals. My teacher taught us that when the elcetrons become excited they move up an energy level. However they do not move in the traditional sense, "they are...

will you tell me if my answer is correct? An apple falls from a tree and 0.5 second later hits the ground. how fst is the apple falling when it hits the ground. i think it is v = gt 5.0m/s2

A box of mass 32.0 kg sits on a horizontal steel ramp 3.4 m long with a coefficient of static friction of 0.30 between the ramp and the box. The end of the ramp is slowly lifted until the box begins to slide down the ramp. What angle does the ramp make with the ground when this happens? What...

Way, dog, ground, handed? see brain teaser #23

i know that other planets in our solar system have lightning storms and as far as i know its natures way of keeping the electric field between ground and atmosphere in balance, but what would happen if this system had a "glitch" and an imbalance occured, could the atmosphere discharge into...

Here is a question I had to figure out in my grade 11 physics class. "If a 40 kg child is running at a rope suspended from the branch of a tree at 8.0 m/s, and then jumps and grabs it, how high will he swing off the ground?" (I had to translate it so pardon me if it is hard to...

Hi, Why is that, the ground state eigenfunction in ANY quantum mechanical system is symmetric under inversion of co-ordinates?