What did the curies demonstrate by studying pitchblende?

uranium is not the only radioactive element.
all elements are potentially radioactive.
radium can cause anemia, bone and tissue damage, and death.
uranium salts emit something that can expose photographic film.

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

What produces wave a)sound b) heats c)transfer of energy d)vibrations

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)