What are some indicators that a chemical reaction is occurring? check all that apply.

the formation of bubbles

a change in size

a change in color

the formation of a liquid

the formation of a precipitate

In a voltaic cell, electrons flow from the (positive/negative) to the (positive/negative) terminal.

Steam enters an adiabatic diffuser at 150 kpa and 1208c with a velocity of 550 m/s. determine the minimum velocity that the steam can have at the outlet when the outlet pressure is 300 kpa.

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.