Escribe todas los fórmulas posibles los Compuestos que formaran los parejas de elementos siguientes al unirse:
Cl y Ca;
Fe y Br;
I y O

Answer sample (c); // would be best because the percentage of the energy in an incident wave that remains in a reflected wave from this material is the smallest;

Answer the radiant sun;

Ke reqd to move from 0 to 50 will be proportional to 50x50 or 2500. this is equal to w.  to change vel from 50 to 150 you need energy prop to 22500 - 2500 = 20,000. this corresponds to 8w.  best answer is a) . work reqd is prop to velocity squared. 

Ithink c because you have to work to become goid