Question $12$

$5$ pts

The expression for the total mechanical energy and definition for all variables in the equation are

$E_{\text{m}\text{e}\text{c}\text{h}}=\frac{1}{2}m{V}^2+mgZ+Q$ where $m$ is mass, $V$ is velocity, $Z$ is the elevation,$Q$ is heat

Emech $=\frac{1}{2}m{V}^2+mgZ+P{V}^{**}$ where $m$ is mass, $V$ is velocity, $Z$ is the elevation, $P$ is pressure, $V^{**}$ is the volume

Emech $=\frac{1}{2}m{V}^2+Q+P{V}^{**}$ where $m$ is mass, $V$ is velocity, $Q$ is heat, $P$ is pressure, $V^{**}$ is the volume

Emech $=\frac{1}{2}m{V}^2+U+P{V}^{**},$ where $m$ is mass, $V$ is velocity, $U$ is the internal energy, $P$ is pressure, $V^{**}$ is the volume

Emech $=\frac{1}{2}m{V}^2+U+Q$ where $m$ is mass, $V$ is volume, $U$ is internal energy and $Q$ is heat energy