Rain Definition and 145 Threads

This week's theme is both difficult and simple. The difficulty is to get a good shot that clearly shows the rain. The simple thing is that you simply have to vote for the picture that clearly shows the rain! :) 1. edward http://img181.imageshack.us/img181/9030/1000308ox8.jpg 2. Chi Meson...

Singing In The Rain This week, your pictures must show a rainy scene. It must be clear enough that one can tell that it is raining. Zz. Contest Rules: 1. Any digital photo or digitally-scanned photo relevant to the theme will be accepted within the contest period. In case there's a...

a man driving his car on a straight road at 25m/s looks through his side windows and sees rain fallling at 30 degrees. when he stops he sees the rain is actually falling straight down(0 degrees). what is the velocity of the rain, relative to the car a- when the car is moving b- when the car...

Driving home this morning the rain was teeming down, we often get teeming rain in periods of drought, but just at the edge of my property it stopped, i could literally take one step from rain to dry, i know a storm has to have boundaries but to be so abrupt was strange.

I had an idea to collect rain in large amounts in rain barrels for use in irrigation for my lawn and garden. I want to create a network of 30 rain barrels at 55 gallons each. I will put one rain barrel at each of my down spouts on my gutters, to catch the rain. Then I will have the rest, 28...

There have been two recent reports of people being electrocuted while walking in a rain flooded street that is continuous with a submerged power cable: Queens, New York and Pattaya,Thailand . Can someone explain quantitativly and in form, the underwater electric field and current path...

http://medheadlines.com/2008/03/01/new-evidence-germs-cause-rain/ Scientists have long known that a particle of some sort, often dust or soot, is needed to form an ice crystal in the atmosphere. Moisture in the atmosphere clings to the tiny ice crystal and freezes, too. The ice crystal gets...

Homework Statement Estimate the volume of acid rain in L that can be neutralized by 1.00 g of limestone. Assume the pH of rainwater collected in your rain gauge is a representative value for acid rain. Assume that acid rain contains sulfuric acid as the source of hydrogen ions. The molecular...

Hai all my friend I have task from my school about Process of Clouds, Rain, and Struktur of Atmosphere when rain fall. i don't have more knowledge about it so please help me Thanks

Well. Its happening as I speak, and I have never seen this before (and neither has anyone else in the house). It is completely sunny out, and suddenly, rain starts falling in our front yard. We realize that there isn't any rain in the backyard, or even on the driveway. The rain was only...

Let's say it's raining outside and you're traveling by foot from point A to point B. If you run, will you get more wet or less wet, or will it be the same?

Homework Statement A 2.76 x 10^-5 kg raindrop falls vertically at constant speed under the influence of gravity and air resistance. After the drop has fallen 131m, what is the work done by gravity? After J is found for gravity, what is the work done by air resistance in units of J. Homework...

A quantity of water equal to 2.5 x 1010 cc falls from a rain cloud that is 1000 m high. If this rain falls in just 1 hour, how much power is generated?

It started at 6 this morning it is now 2 in the afternoon and the heavy rain has not stopped, in all the days i have been alive i have never seen any thing like it, even my raised weed bed has been washed away.

Homework Statement On flat, leaned, surfaces, there are channels (rillenkarren), which are made by dissolution by rainwater (http://mafija.fmf.uni-lj.si/seminar/files/2005_2006/rillenkarren.pdf - not very important). They are 2-3 cm wide and around 0.5 m long. The formation is not yet known...

Here is a puzzler I once posed for a fellow physics student. I have the correct answer... but can you figure it out? Picture a box shaped car with open side windows on a circular track. Suppose it is raining but there is no wind so the rain falls straight down. When the car is stationary...

hi. can anyone push me in the right direction with the followin problem, please? Homework Statement a cart is moving on a frictionless surface at a speed of V_0 the mass of the cart is M. it suddenly starts to rain at time t=0. the rain is dropping vertically at a rate of q gk per...

Some time again, my neighbour told me that rain water is better for the plants than tap water. Is this true? Both tap and rain water come from open sourse such as rivers or paddocks. Tap water has been treated and cleaned. But I guess rain water is pure H20 since heavier elements could not...

So the famous Michelson-Morley experiment tells us that there is no aether, as proven by laser interferometry. Apparently, we can't have aether because one of the light beams would have been delayed by a "headwind" (motion of the aether relative to the Earth) But what about the idea that the...

Hi can someone help me out a little bit on this question How might acid precipitation threaten the fitness of the environment? I need to include molecular aspects such as pH.

Hi, Can someone please check my work and tell me where I am going wrong? Rain is falling vertically downward with a velocity 25m/s. A cyclist is moving from North to South vith a velocity 15m/s. What is the velocity of the rain with respect to the cyclist? What is the direction the cyclist has...

My teacher gave us these extra credit problems and I couldn't really solve them. Here they are: "If air resistance did not exist, would rain be dangerous? Why?" "On the imaginary planet Zelth, a 100 kg mass weighs 15.8N. What is the acceleration due to gravity on Zelth? How does it compare...

I recently saw an episode of mythbusters where they tested the theory that if you run in the rain you get less wet. Their results turned out to be the exact opposite, they found that running in the rain actually made you more wetter. I'm wondering now, taking into account only the "falling" rain...

We have a physics exam tomorrow, and have been presented with a previous exam for practice. One of the assignments have puzzled us quite a bit. Here goes: Rain in a train wagon Consider a train wagon whose upper part is a lidless box. The train wagon moves without friction. There is water in...

When we have hail rain, that is water and little solids in the form of ice crystals falling from the sky, is that evidence of the triple point of water being reached in the atomsphere hence H20 gas, liquid and solid coexist at the same time with the heavier two, liquid and solid falling down...

I hope some of PF members (like turbo-1 and Chi Meson) in Maine, NH and Massachusetts are OK! Rain, Swelling Rivers Threaten New England http://news.yahoo.com/s/ap/20060515/ap_on_re_us/new_england_flooding I think parts of CA and MI have also received significant amounts of rain...

My schoolbook states: My question is: What are the reactions that occur in the leaves that cause their danification? I googlelize and found: It also attacks trees more directly by eating holes in the waxy coating of leaves and needles, causing brown dead spots. That's ok, but how...

I was just curious to how tyres work in the rain. How does the tread shift the standing water so the tyre can have traction? Any information would be appreciated.

i have a 4-day weekend, i looked forward to it all week at school and now that it's here I'm bored out of my mind. I was supposed to go snowboarding today, but it's just my luck that I woke up and it was pouring rain...RAIN! A few degrees colder and that could have been snow, but no, it had to...

I hate it when this happens! I'm down in my office and need to get up to the house, but the wind is howling, the rain has been pounding, and fairly large branches are flying around like missiles out there. They keep slamming against the walls of my office and scaring the heck of my poor little...

Have you seen this? http://www.arxiv.org/abs/astro-ph/0601022 Any comments?

What is going on here? Should I shelter my children from the rain? One of my friends was telling me about acid rain how it used to happen. I said I don't remember it raining acid. ? :cry: The unknown! But seriously, is this a real threat, was it? Was it just a bunch of hype caused by...

So, here's the question: The speed of falling rain is the same 10m above ground as it is just before it hits the ground. What does this tell you about whether or not rain encounters air resistance? So here's my attempt: Since the speed of the falling rain is just the same 10m above ground...

Hi, I searched some websites with information about average size and average speed of rain drops, which I used to calculate the kinetic energy of the rain drop just before it hits the ground. My original question was: Is ALL this kinetic energy transferred to the ground (assume a non-elastic...

I would like to confirm the answer to this question. A car travels due east with a speed of 50.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 75.0° with the vertical. Find the...

Why is my TV better in the rain?? Ok, there is a TV channel that usually has really crappy reception. But dad noticed that it picks up whenever it rains. I looked at him funny the first time, but on a dry day he went and sprayed it with the hose and presto, reception instantly improves...

I am a happy chappie, though i can not tell you why, the rain clouds are gone and the birds are singing oh happy am i.

One of my physics H-work questions asks, If one inch of rain fell on an one arce field, how many rain driops hit that field. I figure that each rain drop has a volume of .5 mL. Does this sound about right?

if a raindrop is a perfect sphere,and it accumulates moisture at a rate proportional to its surface area. Show that the radius increases at a constant rate. I know surface area of sphere = 4 * pi * r^2 dV/ dr = 4 * pi * r^2 I am not sure where to go from here Any help is appreciated...

Why isn't there such a thing as base rain? Or do we just never hear about it?

how come sweaters shrink when you wash them, but sheep don't when they get caught in the rain my ap bio teacher asked us that in class, and nobody had an answer :confused:

!Artificial rain cloud machine created by Israel scientists! Yesterday, while seeing spanish news, I was seeing are report of Israel scientists created a machine that produces artificial clouds with rain!The machine is a clear tube with an apparatus at the bottom and closed at the top...

!Israel's rain producing machine invented this year! Yesterday I was watching Spanish news announcing that Israel scientists have invented a machine that produces artificial clouds with rain!. Israel scientists say they will use it for places in Israel where there is severe drought. Is this...

http://www.newscientist.com/news/news.jsp?id=ns99994446 I am sorry if this was already dicussed earlier, but I thought it was pretty weird: black holes raining down on Earth :O

"PRESIDENT PUTIN has ordered fine weather for the St Petersburg summit and 300th anniversary festivities next week, and it is unlikely to rain on his parade"