How fast the satellite revolves the earth

The satellites revolves the earth every 90 minutes average about 16 times a day

which are at an LEO (Low Earth Orbit) altitude of 400km from above sea level it is moving at a speed of 8 km/s to stay in orbit and against gravity .Gravity at this altitude is around 90% of Earth gravity

An object revolving the earth fall 5 meter in every 8km of rotation so for that satellites, ISS are maintained at 8km/s speed.

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How to calculate age of tree using ring without cutting

How to calculate age of tree using ring without cutting The rings in the trees are used to calculating the age of the trees and tells what the weather was like during each year of the tree’s life. The light-colored rings represent wood that grew in the spring and early summer, while the dark rings represent wood that grew in the late summer and fall. One light ring plus one dark ring equals one year of the tree’s life. The color and width of tree rings can provide snapshots of past climate conditions. For example, tree rings usually grow wider in warm, wet years and they are thinner in years when it is cold and dry. If the tree has experienced stressful conditions, such as a drought, the tree might hardly grow at all in those years Calculating the age of the tree without cutting The age of the tree can be calculated without cutting the tree with the help of an instrument called Increment borer this instrument is bored into the tree up to the centre and collect t

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Why computer mouse have red LED light?

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