Select the correct answer. Which piece of evidence, if discovered, would most directly contradict the current model for how Earth's oceans and
atmosphere formed?
The water on Earth arrived millions of years after Earth formed.
O Comets, meteorolds, and asteroids in the solar system contain no ice.
There is water vapor trapped inside Earth's upper mantle.
O Earth's early atmosphere contained large amounts of water vapor.
HEL

Which of the following describes something an engineer would probably do first when developing new technology meant to reduce ocean pollution? o a. evaluate the benefits and challenges of using certain chemicals to purify water. o b. research new scientific findings in regard to ocean cleanup. o c. identify the need to reduce ocean pollution. o d. research what has been done in the past to clean up oceanic oil residue.

How many neutrons does plutonium -196 with an atomic number of 78.

Large electric fields in cell membranes cause ions to move through the cell wall. the field strength in a typical membrane is 1.0 x 10 7 n/c. what is the magnitude of the force on a calcium ion with charge +e? what is its acceleration? is it possible for a particle with the same charge as as calcium to have a different acceleration if placed at this location? what would change the acceleration: mass of the particle? diameter of the particle?