Is the Grand Canyon the “greatest” canyon in the world?
Earth ScienceAsked by: Wendy Irvin Is the Grand Canyon the biggest canyon in the world? Grand Canyon occupies a large portion of northern Arizona and extends about 270 miles from Lees Ferry (just southwest of Lake Powell) to the Grand Wash Cliffs (just east of Lake Mead)–the longest canyon in the world. “Only” a mile a
How long did it take for Earth’s magnetic field to first appear?
Earth ScienceAsked by: Albana Ying How long ago did Earth’s magnetic field form? 3.5 billion years ago Multiple lines of evidence have shown that the Earth’s magnetic field existed at least 3.5 billion years ago. However, the planet’s core is thought to have started solidifying just 1 billion years ago, meaning that the magnetic field must
How do I get the velocity of the P-wave or S-wave without using the travel time graph?
Earth ScienceAsked by: Albana Ying How do you find the velocity of P and S waves? The velocity of a P or S wave is a function of the physical properties of the rock the wave is traveling through.Velocity P wave = ((B + 1.3G)/Density)1/2, where: B = the bulk modulus – the resistance to change
What is the most powerful natural catastrophic event on record?
Earth ScienceAsked by: Karen Handy Excessive rainfall over central China in July and August of 1931 triggered the most deadly natural disaster in world history — the Central China floods of 1931. What is the most powerful natural event? La Garita Caldera Eruption The most powerful eruption in the observable history of our planet the eruption
Can we define “drainage density” for a soil column (point-scale)?
Earth ScienceAsked by: Karen Handy How is drainage density determined? Drainage density is a measurement of the sum of the channel lengths per unit area. It is generally expressed in terms of miles of channel per square mile. What is drainage density simple definition? The drainage density is the measure of the length of stream channel
How to estimate the settling time of atmospheric particulates as a function of aerodynamic size?
Earth ScienceAsked by: Christina Cornwell What is the relationship between particle size and settling time? The settling velocity, and, as a result, settling time, are proportional to the diameter of the spherical particle squared. The larger the sphere diameter, the faster the particle will settle. The smaller the particle diameter, the longer it will stay suspended