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Find two values of k, such that the line y = kx + 2 is tangent to the curve y = x^2 + 4x + 3

There will be intersection when x^2 + 4x + 3 = kx + 2. Our goal is to find the values of k which would only give one solution to this quadratic equation, which would make the lines 'tangent' to each other. F...
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Answered by Andrew N. • Maths tutor
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Calculate the kinetic energy of a proton moving at 95% of the speed of light. (c = 3x10^8 m/s, m_p = 1.67x10^-27 kg) [4 marks]

KE = 0.5mv 2 [1] v = 3x10 8 * 0.95 = 2.85x10 8 [1] KE = 0.5 * 1.67x10 -27 * (2.85x10 8 ) 2 [1] KE = 6.782 x10 -11 J [1]
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Answered by Tom F. • Physics tutor
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Assess utilitarianism. (25 Marks).

Assess utilitarianism for a board can be a very open question. You aren't subject to specific forms of the theory, though it can be helpful to assess at least two. Recognising a problem for one in an essay s...
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Answered by Jack S. • Philosophy tutor
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Describe the process of extracellular digestion

Extracellular digestion is a process in which an organism feeds by secreting enzymes through its cell membrane and on to the food. These enzymes then catalyse the breakdown and the digestion of the food. Onc...
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Answered by Stuart N. • Biology tutor
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How do you say that the transition era in Spanish history lead to economic and poiltical changes?

you would say: 'la Transicion Española significo grnades cambios economicos, sociales y politicos' you could also add what those changes are, to show the examiner you have really researched this topic area. ...
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Answered by Cristina S. • Spanish tutor
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