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how do i calculate acceleration?

it is the change in speed over time. So a = v-u / t
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Answered by Abdullah T. • Physics tutor
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Bismuth-208, which has an atomic mass of 208u and 83 protons in the nucleus, decays through the emission of 2 alpha particles and a beta-positive particle. What isotope results from this decay?

208 83 Bi ==> x y Z + 4 2 a + 4 2 a + 0 1 B x = 208 - 8 = 200 y = 83 - 5 = 78 Proton number = 78 therefore Z = Pt Z= 200 78 Pt
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Answered by Danny L. • Physics tutor
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Using standard formulae, derive an expression for the final speed of a falling object in terms of its change in height. Assume zero air resistance or other resistive forces.

E k = (1/2)mv 2 E p = mg(dh) Set these equal to each other, because of conservation of energy: (1/2)mv 2 = mg(dh) Cancel the mass: (1/2)v 2 = g(dh) v 2 = 2g(dh) v = (2g(dh)) 1/2
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Answered by Danny L. • Physics tutor
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What are Newton's three laws?

First: an object remains at rest or constant speed unless acted on by an external force Second: Force is equal to rate of change of momentum Third: Every action has an equal and opposite reaction
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Answered by Charlie D. • Physics tutor
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Explain how Maxima and Minima occur in Young's double slit experiment

When coherent, in-phase light passes through two slits they act as seperate sources, these waves diffract and overlap, causing regions of constructive and destructive interference. When they collide with a s...
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Answered by Charlie D. • Physics tutor
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