Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature? A. Dry ice undergoes deposition, an endothermic change, at room temperature.
B. Dry ice undergoes sublimation, an endothermic change, at room temperature.
C. Dry ice undergoes sublimation, an exothermic change, at room temperature.

When applying kirchhoff's rules, one of the essential steps is to mark each resistor with plus and minus signs to label how the electric potential changes from one end of the resistor to the other. the circuit in the drawing contains four resistors, each marked with the associated plus and minus signs. however, one resistor is marked incorrectly. which one is it?

Explain why electric current cannot exist if a current doesn't have a voltage source.

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?