Recent content by ThetaPi

Good work. You're only one step away. Remember that you want to find an equation k = ??. What if we multiply both sides by k, and then divide both sides by T^2?

You see that your k is inside the square root. Maybe squaring both sides of the equation might help?

I know that, but how do we calculate that numerically? I presume that hang time is dependent on the y-component of the initial velocity? Thanks again.

Could someone kindly explain to me what hang time is, in the context of 2D projectile motion? Enlighten me on the equations of motion that might be applicable to such a problem. In other words, given a projectile launched at \theta$ above the horizontal with an initial velocity of v_0, how do...

Homework Statement Three objects P, Q, and R, are viewed through a plane mirror AB. When an obstacle is moved towards the mirror, which object "disappears" (i) first; (ii) last? Diagram. I will describe it in words. The mirror is horizontally placed. Q is placed 10 cm directly above edge...

Homework Statement Calculate the maximum mass of aluminum that can be made from 408 tonnes of alumina, assuming that aluminum is produced by electrolysis. Homework Equations At the cathode: Al^{3+} (l) + 3e^{-} \Rightarrow Al (l). At the anode: O^{2-} (l) \Rightarrow O_2 (g) + 4e^{-}. Is...

They are electrons. In metals, they are evenly and randomly distributed throughout the sphere since they are free to move? Delocalized electrons? I don't know. Please guide me on this.

Homework Statement Describe how a metal sphere on an insulating stand is charged if a positively-charged rod were to touch the sphere. (This is a 5 mark problem, so at least 5 major points should be included in the answer. I am not sure whether I have fully answered the problem.) Homework...

Problem statement. A spherical wave (from a point source) reflects from a planar surface. Draw a ray diagram and sketch some wavefronts for the reflected wave. Attempt It is easy to sketch some wavefronts for the reflected waves; however, how is it possible to draw a ray diagram for...