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The period of the purges (1936-38) involved the widespread surveillance, imprisonment, and execution of ‘counter-revolutionaries’. This was often used as a smokescreen for Stalin to kill his personal poli...

Firstly, you form the question into an equation. for example, J + T = 84. We know Jessica paid £38.50, so now we can add that to the equation. 38.50 + T = 84. Now that we have does this we move the 38.5 t...

The Schwarzschild radius of the sun can be calculated using Rs= (2GM)/c². Substitute in the mass of the sun (M=210³⁰), the speed of light (c=310⁸), and the univer...

As the potential difference across the filament lamp increases the current across the lamp also increases due to Ohm's law.The increase in current flow also causes the lamp to heat up which causes the res...

Biodiversity is defined as the range of different organisms that live in a particular ecosystem (the living and non-living components of an area, and how they interact to produce a syste...