A 100 kg object is dropped from a height of 25 m. What
is its velocity after falling ?

True or false when elements combine to form a mixture, the resulting chemical properties may be very different from those of the elements that make it.

If element x has 99 protons how many electrons does it have

Materials will have different energies associated with the electrons inside them. this is related to how strongly bound they are by their work function. if we sandwich a material with a very low energy between two materials with a high energy, we create a trap for an electron. if this trap is very narrow in one direction in comparison to the others, this is approximately a 1-dimensional box that confines the electron. what is the lowest energy of an electron in the box if the thinnest direction across the materials is 4.81 nm?