A box resting on the top of a bookcase is an example of A. Potential Energy

B. Kinetic Energy

C. Work

D. Nuclear Energy ​

A. Potential Energy

Explanation:

The book on a bookcase has potential energy whereas the book falling off a desk has kinetic energy.

potential

Explanation:

energy stored in a body

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

the answer for sodium is 0.186

the answer for rubidium is 0.251