0
Thunderstorms and Lightning
Also referred to as a lightning storm, a thunderstorm is a weather form wherein thunder and lightning are present. Thunderstorms, most especially if accompanied by heavy rains and downburst winds, pose hazards to people and the environment.
5,088 Questions
Interesting facts about the sun?
The sun is a massive ball of hot gas at the center of our solar system. It accounts for over 99% of the solar system's mass. Energy produced by nuclear fusion in the sun's core takes about 8 minutes to reach Earth and provide us with light and warmth.
Where is a good place to find information on how computers have changed?
Go to google.com and type in the words "computer history" (without quotation marks).
TP- 12 What should you do if caught in severe storm conditions?
Put on a jacket if it is not on already
Which source of natural water is free from pathogen?
Subterranean water is generally free from pathogens
How are earthquakes triggered?
Normally, tectonic plates regularly slide against each other imperceptibly and we are not aware of it, except for scientists that measure these "mini-quakes" with seismometers. However, when two (or more) tectonic plates get stuck they build up pressure where they are in contact with each other. They are kept from moving by friction but eventually the friction is not enough to stop them from moving. When the plates finally do slide, it releases a large amount of stored energy caused seismic waves. Those waves travel up to the surface and cause the ground to shake.
Because the pressure is relieved suddenly, they slide quickly and then stop just as quickly causing (at minimum) two large shakes on the surface; one for the forward movement and one by the sudden stop. There may be multiple small quakes that follow as the plates complete adjusting until the friction is low enough to allow them to stop. This is true whether the quake is caused by the two plates either moving via strike-slip (sliding by each other sideways) or subduction - also known as thrust - (one sliding under the other).
Note that 90% of an earthquake's energy is turned into heat rather than movement and never reaches the surface at all. A mighty good thing for us!
Volcanoes can also produce earthquakes. As magma begins to rise to the surface and crustal rock melts it changes the stresses of the whole area surrounding the volcano.
Well how the holocaust started was very simple. After world war 1 many Germans had lost their pride, they wanted a way to gain power after to losing such an important war. Soon a new leader rose from everyone else and planted an idea in everybodys mind. That they could get the power by simply doing one thing,kill the Jewish. Hitler planted the idea that the Jewish race was the reason they lost the war.he said that if they destroyed the Jewish race they would again gain power. So that when world war 2 starts they could win it because they killed all the people that were close to god.
What does it mean when fast moving clouds are during a thunderstorm and tornado warning?
If a siren goes off or a tornado warning is issued, it means that either an actual tornado has been spotted, or that the dopplar radar has detected rotation within the thunderstorm, meaning a tornado can form at any time. Usually the weather channel or the emergency braodcast system will tell you on the screen if there is rotation or an actual tornado.
This is a good question, and one that needs to be addressed because this is a frequent sighting in strong thunderstorms. What you are seeing is simply the parent thunderstorm intaking air from all sides at the surface, where it rises up and continues to feed the storm. This updraft can support very strong winds and large hail, but it does not necessarily portend a tornado.
Furthermore, the clouds that are moving rapidly have nothing to do with a tornado (unless they're actually rotating, which is an indication of a funnel cloud or wall cloud, which precedes it). The air near the base of the main cloud deck is pretty saturated, and due to turbulent motions there are areas where these small clouds will form in the wind where the air saturates and condenses.
As mentioned above, if there is a tornado warning then there has either been a tornado spotted or there is a strong indication that one is forming or is on the ground. Be on the lookout for rotating clouds that are lowering from the base of the cloud deck. There are a lot of fascinating dynamics that occur with supercells and other strong storms that can spawn a tornado, and some of their manifestations are sometimes mistaken for a developing tornado. Keep an eye on the sky and watch for rotation, and remember that tornadoes more often than not do not develop even when the conditions are right. Even when a funnel clouds forms, it only reaches the ground about half the time.
Does standing next to a dog in a thunderstorm increase your chance of getting hit by lightning?
No standing next to a dog in a thunderstorm does not increase the chance of getting hit by lightning? Dogs have a better sense to the earth around them. Probably standing right next to a dog will have a lower chance saying they will run away from where possible lightning can strike.
What are the symbols for fronts high air pressures low pressures and hurricanes on a weather map?
High pressure is represented by a blue letter "H" while low pressure is represented by a red "L." Hurricanes are represented by circles with spiral arms.
Charge (Q) on the capacitor plate = Capaciitance (C) multiplied by voltage (V), so Q=CV. So if V has a triangular in waveform, then so has Q. Current I is the rate of supply of charge. Q increases linearly for a time and then decreases linearly for an equal time, alternately, and the rate is therefore a positive constant for a while, followed by a negative constant for the same period, repeatedly. So you get an alternating (positive followed by negative, repeatedly) waveform, commonly described as a "square wave".
Are you safe in canoe during thunder storm?
No, you should NEVER be on a lake during a thunderstorm, it is one of the worst places to be.
Lightning can heat the column of air along and adjacent to it to temperatures as high as 35,000oF - this causes the superheated air to explode outward as a shockwave faster than the speed of sound, effectively creating a "sonic boom" which is thunder [that is the current prevailing theory anyway, and observations have been consistent with the theory's results, though I don't have details at my fingertips].
Those kinds of extremes can make things very loud, and thunder is louder (a) the closer you are to the strike site, and (b) if there happens to be a low-level inversion (a point in the atmosphere where air temperature jumps up with altitude, rather than dropping as is usually the case) around the strike site - in that case, part of the thunderous sound that would normally travel upward is trapped closer to the Earth, turning up the volume.
When a storm hits while a vessel is underway what should the operator do?
Ensure that all those aboard are wearing a Personal Flotation Device
Do 1000 thunderstorms occur at any given time?
Yes. At any given time there are about 2000 thunderstorms occurring, many of them in the tropics.
Who discovered electricity and the lightning rod?
Benjamin Franklin was an inventor. He was curious and he loved to learn about new things. He also thought it was important to make life better with the things that he invented.
When did derecho or right rotating storms start in North America?
First of all, a dercho is not a "righ rotating storm;" it is chiefly a straight-line wind event, though the northern end may rotate counterclockwise. Derechos have probably been ocurring in North American for as long as the continent has existed.
Why do mountains get struck by lightning?
The taller an object is, the greater than chance that it will be hit by lighting. Mountains are quite tall, and so are struck fairly frequently.
Can lightning appear to be colored black?
However, there IS such thing as a black rainbow. They're called "moonbows" because they're caused by moonlight and moist air rather than sunlight and rain.
Who is the cast of St Elmo's Fire?
There are 7 main cast members:
Emilio Estevez (Kurby)
Rob Lowe (Billy)
Demi Moore (Jules)
Andrew McCarthy (Kevin)
Alley Sheety (Leslie)
Judd Hirsch (Alex)
Mare Winningham (Wendy)
Up to which frequency does the gain of an antenna increase as the frequency increases?
In general, an antenna is "cut" or "built" for one frequency, or for a band of frequencies centering on one particular frequency. This antenna will respond to all frequencies, but will only exhibit "maximum" gain at one frequency. Frequencies higher or lower will not be received quite as well, and the farther from the "tuned" or "center" frequency the signal is, the less gain the antenna will provide on that frequency. As we work with an omnidirectional antenna, we can "tinker" with it a bit in an attempt to get it to work with a broader range of frequencies, but as we broaden the usable spectrum over which it will work, we will see less gain on the "center" frequency. If you're getting the idea that tuning an antenna involves trade-offs, you're getting the right picture. No improvements are possible without "cost" in another part of the operating spectrum. If we move to a directional TV antenna like, say, one of those antennas (not the dish) that still can be seen on some rooftops, we see what is basically a modified log periodic antenna. This antenna will generally be "pointed" or "aimed" in the general direction of the transmission antenna of the station(s) for which reception is desired. Stations with broadcast antennas to the side or the rear of this antenna won't be "seen" as the antenna is highly directional. Having said all that to get you up to speed on some fundamental concepts of the antenna, as we move up the frequency spectrum (starting "low"), the gain of the antenna will increase until we reach the "center" or the "tuned" frequency for that antenna. After that, increasing the frequency will result in signals with increasingly lower gain.
