Why would the discovery of a fossil imply that earth is much older than originally though?

Why does the moon cycle from new moon to full moon?

A ballet student with her arms and a leg extended spins with an initial rotational speed of 0.90rev/s. As she draws her arms and leg in toward her body, her rotational inertia becomes 0.80 kg⋅m2 and her rotational velocity is 4.1rev/s.

Calculate the solubility (in m units) of ammonia gas in water at 298 k and a partial pressure of 4.50 bar. the henry's law constant for ammonia gas at 298 k is 58.0 m/atm and 1 bar=0.9869 atm.

Which is the basis of the major rock classifications? A. degree of glassiness B. the method of rock formation C. rate of conglomeration D. the number of foliated layers

One man wanted to weigh the air. He blew a balloon and weighed it. Then he blew air out of the balloon and weighed again. The weight in both cases was the same. From this the man concluded that the air weighs nothing.

Which excited electron has the lowest energy?

A ball on a string is swung at a constant speed of 3m/s in a horizontal circle. if the string is 1.25m long what is the centripetal acceleration of the ball?

A horse trots away from its trainer in a straight line. moving 38 m away in 9.0 s. It then turns abruptly and gallops halfway back in 1.8 s. Calculate its average speed and average velocity?

Why aren't all atoms radioactive?

Why would the discovery of a fossil imply that earth is much older than originally though?