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Describe the formation of hotspots and explain their relationship to plate movement.

Radioactive deacay in the Earth's core creates extremely high temperatures which heat the lower mantle. When radioactive decay is concentrated, local thermal currents are generated in the lower mantle. Plume...
BD
Answered by Bethan D. • Geography tutor
27430 Views

Describe how seismic waves and earthquakes can be measured.

Seismic waves can be measured by seisometers. For example the 'San Andreas Fault Observatory at Depth' where seisomoters have been placed in an L-shaped bore hole accross the faultline at Parkfield. Earthqua...
BD
Answered by Bethan D. • Geography tutor
11161 Views

Why does AlCl3 form the dimer Al2Cl6?

AlCl 3 has a trigonal planar structure. There is an aluminium atom with 3 sp 2 hybridised orbitals which bond to 3 chlorine atoms. The bond angle is 120 degrees. Each chlorine atom shares 1 electron with alu...
JW
60430 Views

What do you need to know to do well in the CAT?

You are not expected to have any prior knowledge about ancient languages when taking this admissions test. Rather, it is designed to test your aptitude - your ability to think in a way which will allow you t...
LS
4857 Views

How do you find and solve a composite function?

Composite functions can be thought of as 'functions within functions'. For example, let's suppose that f(x) = x 3 g(x) = x + 5 defined for all real numbers. (Note: composite functions may have a different no...
LG
Answered by Lisa G. • Maths tutor
150556 Views