Okay I need help with two questions, though if you can\'t answer both that\'s fi

Question

Okay I need help with two questions, though if you can't answer both that's fine.

1) You are given a small dc motor and fully-charged D batteries. How would you use that motor to help determine the unknown viscosity of an oild sample? YOu can acquire any other materials needed. What other materials would you need and what procefure would you follow to determine the unknown viscosity.

2)You are hired to design a bathroom bowl. You have to determine the size of the overflow orfice on the side wall of the bowl. How would you go about deciding what size to make the hole so that it is the minimum size to prevent the bowl from overflowing

Explanation / Answer

The motor rotates a disc having holes for light from a Light Emitting Diode (LED) to fall on a photo-diode thus undergoing amplification and this signal is then transmitted to a moving-coil meter as a deflection. The speed of rotation indicates the way signals are sent thus affecting the meter deflection. If the faster the speed of rotation of the disc, then the less the deflection on the meter and vice-versa.

The D.C motor, rotating disc, pillars, chuck and the stirrer were continuously adjusted to reduce / eliminate effect of noise, vibration and wobbling of the machine. To ascertain its reliability and durability, it should subjected to one hour (60 minutes) test runs at intervals.

Related Questions

Navigate

• Browse (All)
• Browse O
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.