If the half-life of a decaying isotope is 10 years, which statement is true after 20 years? A. The relative numbers of parent and daughter nuclei cannot be determined B. The numbers of parent nuclei and daughter nuclei in a sample are equal. C. There are more daughter nuclei than parent nuclei in a sample. D. There are more parent nuclei than daughter nuclei in a sample.

Several mountains together form a mountain . a few of these combined form a mountain system. several systems combined form a mountain , which can stretch thousands of miles in length.

An automobile steering wheel is shown. what is the ideal mechanical advantage? if the ama is 8, what is the efficiency of the steering wheel?

According to newton’s law of universal gravitation, which statements are true? as we move to higher altitudes, the force of gravity on us decreases. as we move to higher altitudes, the force of gravity on us increases. as we gain mass, the force of gravity on us decreases. as we gain mass, the force of gravity on us increases. as we move faster, the force of gravity on us increases.