They are reflected round the curve of the Earth off layers in the atmosphere which act as mirrors (the ionosphere).
Any Amplitude Modulated radio signal will penetrate the ionosphere if its carrier frequency is high enough. Signals in the commercial AM broadcast band, with frequencies between 530 and 1700 KHz, aren't high enough. Most of their energy reflects from the ionosphere.
Frequencies of sound should travel faster in cold air because it is more dense than warm air. Sound propagates much faster through water than air for the same reason.
(a distance traveled) divided by (time to travel the distance) is known as a "speed" .
Not possible. The displacement could be equal to the distance traveled ... if the route of travel was a straight line ... or less than the distance traveled ... if the route of travel was wavy and wiggly. But you can never wind up farther from your starting point than the distance you travel.
Yes, how much gets through depends on the material, thickness of walls and objects inside, and the frequency of the sound. The sound will 'attenuate' or decrease in intensity as it travels. That is because the sound changes the form of energy that it is in to heat, motion, etc. Low frequencies will travel much farther than higher frequencies.
High frequencies are more damped by air than the bass frequencies.
higher frequencies attenuate more the further distance they travel.
The plural of frequency is frequencies. As in "radio waves travel on different frequencies".
Frequencies over 30 Mhz normally travel through the ionosphere, whereas frequencies under 30 Mhz will normally bounce off the ionosphere, and back to earth.
During the Pax Romana it was relatively safe to travel on Roman roads.During the Pax Romana it was relatively safe to travel on Roman roads.During the Pax Romana it was relatively safe to travel on Roman roads.During the Pax Romana it was relatively safe to travel on Roman roads.During the Pax Romana it was relatively safe to travel on Roman roads.During the Pax Romana it was relatively safe to travel on Roman roads.During the Pax Romana it was relatively safe to travel on Roman roads.During the Pax Romana it was relatively safe to travel on Roman roads.During the Pax Romana it was relatively safe to travel on Roman roads.
High frequencies are more damped by air than low frequencies.
Because at night the sun goes down, which is a good thing for frequencies, because the sun is giving of radiation which is disrupting the frequencies. so at night nothing is disrupting the frequencies.
A person should be able to travel the posted speed limit with a Thule 1600 car top carrier. This is assuming the car top carrier is mounted to the car properly.
All communication systems use electromagentic waves which by the law of Superposition of Waves travel independently in any meadium and hence do not interfere but if the frequencies tend to match then the carrier waves with amplitude modulation are more affected and give poor quality sound at the receiving end than the frequency modulated carrier waves.
Any Amplitude Modulated radio signal will penetrate the ionosphere if its carrier frequency is high enough. Signals in the commercial AM broadcast band, with frequencies between 530 and 1700 KHz, aren't high enough. Most of their energy reflects from the ionosphere.
easier to transmit, higher frequencies radiate better. there is more bandwidth available at higher frequencies. higher frequencies travel in straighter lines so are more directional, this may or may not be an advantage depending on what is needed
Speed Average speed- the total distance traveled divided by the time it takes to travel that distance Velocity is also the distance or displacement divided by the time