Precipitation that appears as a line indicates a weather front. Can you locate an obvious front? If so, where is it located? Which direction is the front moving? Pls, answer ill give brainlist.

What type of scientific model does the flow chart represent? (a chart of the scientific process) a. conceptual b. mathematical c. physical d. virtual

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.)

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit