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90 degrees100 gradspi/2 radians
radio signal bents around the curvature of earth and hence travel longer distance than the line of sight signal. At ultra high frequencies signal follows the line of sight path and hence maximum communication distance is limited due to curvature of earth for given height of transmitting and receiving antenna
The Summer Solstice is the day on which the Sun reaches its maximum elevation north of the equator. This occurs on June 21 or June 22 in the northern hemisphere, depending on the cycle of leap years. It is also the longest day of the year.
He used only simple geometry and observation of the sun Eratosthenes assumed that the sun was so far from the earth that its rays were practically parallel when they reached it, and that the earth was spherical. Then, he calculated the the degree of elevation of the sun at Alexandria and Syene at specific times, and estimated the distance between the two. By so doing, he was able to calculate what he thought was the number of stadia per degree of elevation of the sun. Then, he multiplied this quantity by 360 degrees (the maximum elevation of the sun assuming that the earth was spherical) to calculate the circumference of the earth.
On the equinoxes the poles both have common day of 24 hors of sunlight as the sun circles the horizon. Until the next equinox one pole has shorter days while the other maintains its 24 hours of daylight while the sun rises higher in the sky intil it reaches its maximum elevation of 26 degrees on the summer of winter solstice (depending on the pole)
90 degrees100 gradspi/2 radians
It ranges from a minimum elevation of 0 to a maximum of 134 meters.
944 feet maximum
The stars are "fixed" in their positions in space. (Well, they actually do move - but because of the vast distances, they don't appear to move appreciably over the course of a human lifetime.) So, observing the rise times of certain stars and their precise elevations above the horizon will enable us to calculate our location on the surface of the Earth. The star Polaris is very nearly directly above the North Pole; so, measuring the elevation of Polaris above the horizon will tell us our latitude within 0.7 degrees. if we also have an accurate watch, we can calculate our latitudes quite accurately. One of the easiest celestial observations to make is the "local apparent noon" sight of the Sun. Using your sextant, measure the elevation of the Sun above the horizon. Continue to observe the Sun as its elevation increases, and note the precise time and elevation when the Sun reaches its maximum elevation. This is a one-sight "fix" of your position. The time of "local apparent noon", compared to your watch, will give you your longitude; the elevation above the horizon makes the math easy to calculate your latitude. This does require an ACCURATE watch, and a nautical almanac showing the true position of the Sun in the sky. _______________________ Question moved to the Discussion page.
The Maldives
It can be anywhere from 0 to a maximum of about 80,000 feet.
The top of the coconut tree, where the shaman is.
Maximum possible vacuum is -0.1 Mpa
If x is the unknown or variable in an equation it can have many possible maximum or minimum values
The class interval is the maximum possible value in the class less the maximum possible value in the class below. The second is equivalent to the minimum possible value in the class.
maximal is adj.meaning greatest possible while maximum is noun meaning greatest possible amount or quantity
See the link below.