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Draw and describe the major points of a typical stress-strain graph for a metal.

There are five major points on a typical metal's stress-strain graph. The first is the limit of proportionality . Prior to this point, the stress strain graph tends to be a straight line, and the Young's mod...
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Why does an electric drill heat up when passing through metal compared to in thin air?

To understand why the drill produces more heat we must understand Lenz's law. Lenz's law states that the direction of an induced current is always such as to oppose the change that causes the current. In the...
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A tall 2 meter tall basketball player shoots for the net that stands 3 meters from the ground. If he throws he ball from head height at an angle of 60 degrees and the ball travels at 10 meters per second, how far away is the hoop?

By taking the initial vertical speed as v v = 6 sin(60) = 5.2 ms -1 .The max height of the ball is given by v v 2 = u v 2 + 2as. From this, s = 1.4m.Knowing the hieght, we can find the time that the ball spe...
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A nucleus of the stable isotope Pb(208,82) has more neutrons than protons. Explain why there is this imbalance between proton and neutron numbers by referring to the forces that operate within the nucleus.

Must include 3 points from 1-5 and 1 point from 6-7 for 4 marks. 1.Strong nuclear force (SNF) affects nucleons or protons and neutrons.2. SNF attraction extends up to 3 fm (allow 1–4 fm) 3. The SNF is repuls...
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What is the total capacitance of a circuit containing a 3microfarad capacitor and a 2microfarad capacitor in series.

For capacitors in series (1/Total capacitance)=(1/capacitance1)+(1/capacitance2).1/C=[(1/(3 10^-6))+(1/(2 10^-6))]^-1Total capacitance=1.2*10^-6=1.2microfarad
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