How should a voltmeter be connected in figure 19 to measure the motor’s voltage?

answer:

in series

Explanation:

the voltmeter should always be in series so it will be in series with the motor

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper

in physics zero. in muscle fatigue could be high