Which of the following could be a method used to estimate the age of an ancient rock? a. to find out its mineral composition b. to find the age of the fossils trapped in it c. to calculate the amount of c-14 atoms left in it d. to calculate the number of sediment layers in it

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here

‘which reaction would most likely require the use of an inert electrode?

What is the typical rotational frequency frot for a molecule like n2 at room temperature (25∘c)? assume that d for this molecule is 1å=10−10m. take the total mass of an n2 molecule to be mn2=4.65×10−26kg. you will need to account for rotations around two axes (not just one) to find the correct frequency. express frot numerically in hertz, to three significant figures.