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First, we know our equation for resistivity rho = RA/L. We know that L and A are in [m], which are already in SI units - however, [ohms] are not SI units. We do know, however, we know that R = V/I, and th...

Use SUVAT equations to find height, S, when final velocity, V, is 0: s = ?u = 50 m/sv = 0 m/sa = -9.81 m/st = Not necessaryRecall: v² = u² +2as s = -u²/(2a) = -2500/(...

This is a common class of question concerning projectile motion and the independence of orthogonal forces.
First the student should sketch the problem an label the forces, In doing this they will see...

The photoelectric effect is the observation that when light of a certain frequency or higher is shone onto a particular metal surface, electrons are emitted from the metals surface. Let's consider a devic...

F = qv x B = qvB sin(O). q is the electrons charge = 1.6x10^-19 C. v is the electrons speed = 2x10⁵ ms^-1 . B is the magnetic field strength = 0.5 T. ...