A solid is placed in a solution. Which observation most likely indicates that a chemical reaction has occurred?
.
The size of the solid has rapidly decreased
The color of the solution has not changed.
The solid has bubbles forming on its surface.
The temperature of the solution stays the same.

What is the fate of the electrons that interact with a specimen in an electron microscope?

Which of the following is the main energy source for the sun? a. fission of hydrogen b. fusion of hydrogen c. fusion of helium d. fission of iron

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.