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Give Hobbes' three psychological arguments for the state of war

Hobbes argues that in a ‘state of nature’, individuals are not subject to a common higher authority; instead they are free to follow their desires and act upon their own private judgement. We all have a natu...
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Answered by Asher K. • Politics tutor
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What is the amplitude and period of y=3sin(5x)?

Amplitude of a periodic function is the maximum height it reaches above the centre line (or the lowest). This expressed in the equation as '3'. If the 3 was not there, then the sin wave would have an amplitu...
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Answered by Madeleine R. • Maths tutor
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A rock has a mass of 100g and it is thrown across a pond at a speed of 30ms^-1. Calculate the de Broglie wavelength of the rock and explain whether you can see the wave produced.

λ=h/p λ=h/mv λ= 6.63 10^-34/0.1 30 λ= 2.21*10^-34m We cannot see the rock's de broglie wave because its wavelength is much smaller than that of the visible spectrum
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Answered by Liam M. • Physics tutor
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Show that the radius of an orbit may be expressed as follows: R^3=((GM)/4*pi^2)T^2

Start with Newton's Law of Gravitation: F=(GMm)/R^2 (1) Since orbits are assumed to be circular recall the equation for centripetal force: F=(mv^2)/R (2) We can now equate these 2 forces due to them being ac...
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Answered by Liam M. • Physics tutor
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Define Simple Harmonic Motion

The acceleration or unbalanced force is proportional to the displacement of the object from its equilibrium position and acts in the opposite direction Mathematically, this may be expressed as a=-w^2y where ...
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Answered by Liam M. • Physics tutor
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