Can someone help me for one of these questions it would mean a lot pls

Two things that biomedical has invented or innovated

Which of the following statements is true about planck’s law

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4