A good advancement would be a portable radio. They have made life easier for people who are walking/hiking and are looking for something such as the weather for the night or the score for a sports game.
<em>thanks</em><em> for</em><em> your</em><em> </em><em>question</em><em> </em><em>and </em><em>please</em><em> correct</em><em> me</em><em> if</em><em> I'm</em><em> </em><em>wrong.</em>
<em>please </em><em>press </em><em>the </em><em>heart </em><em>and </em><em>brainli</em><em>e</em><em>sts </em><em>answer</em><em>s</em><em> </em><em>and </em><em>5</em><em>s</em><em>t</em><em>a</em><em>r</em><em>s</em><em> </em><em>rating</em>
1 because college has effects that can last your whole life. All of the rest of the answers are short term.
Nothing happens. Just reverse the probes of multimeter & measure it again, this time around it should come positive