Humpty dumpty (12 kg) sat on a wall (2 m high). what was his potential energy, before his great fall?
a. 235.2 j b. 235.2 n c. 24 j d. 246.1 w

Gunpowder residue is most likely to show up where on a shooters hands

Which is special about a dc circuit ? a. it has both series and parallel components b. it has only series or only parallel components c. charge moves in a single direction d. charge moves back and forth quickly

Consider a hydrogen atom in the ground state. what is the energy of its electron? =e= jj now consider an excited‑state hydrogen atom. what is the energy of the electron in the =5n=5 level? =e5= j