April swims 50 m north and then turns and swims 20 m back to the south.
what is her velocity if it takes her 60 seconds?

This chart represents the melting point of several substance. what besy explains the high melting point of the salt?

What is an example of a physical property?

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided