The "Kingda ka" roller coaster (pictured) is the tallest roller coaster in the world, standing at 139 m (456 ft!). Most roller coasters begin by hauling passengers up to a great height, then releasing them downward for the ride. Explain why most roller coasters need to have the tallest hill as the first hill. Be sure to include the terms of potential energy and kinetic energy in your response. *

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

increased stability in the completion of fluorine's outer shell.

elements make up everything, and they combine to make compounds.

the answer is c

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.