See Periodic Table Identify the statement that is true about radiometric dating. Choose one: A. Dating of metamorphic rock tells when the high temperatures of metamorphism heated above the closure temperatures of the minerals involved. B. It can be used only if some radioactive element is present in the rock. C. It can begin only when the isotopes heat up enough to decay. D. Dating of an individual sand grain in a sandstone accurately dates the sedimentary rock's formation.

Argon, neon, and xenon are examples of

What are some properties of transverse waves?

Astone is dropped from the upper observation deck of a tower, 250 m above the ground. (assume g = 9.8 m/s2.) (a) find the distance (in meters) of the stone above ground level at time t. h(t) = (b) how long does it take the stone to reach the ground? (round your answer to two decimal places.) s (c) with what velocity does it strike the ground? (round your answer to one decimal place.) m/s (d) if the stone is thrown downward with a speed of 2 m/s, how long does it take to reach the ground? (round your answer to two decimal places.) s