Which of the following cannot be dated radiometrically? dinosaur eggs human artifacts animal bones sedimentary rock

human artifacts

PS. are you using Odysseyware

your not the only one behind:)

Dinosaur eggs and sedimentary rocks cannot be dated radioactively

Radiations are strong and they can damage the cells or matter which is delicate in nature. Eggs come under the category of delicate and fragile objects. More over dinosaurs eggs cannot be found nowadays so if something is not present practically, it cannot be used for experimental process. Similarly  carbon decays relatively quickly, this only works for rocks younger than about 50 thousand years. So in order to date most older fossils, scientists look for layers of igneous rock or volcanic ash above and below the fossil. and they avoid sedimentary rocks.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.