## Determine which coil (top or bottom, or one in the middle) deflects to zero pitch first as the force is increased.

1. A conical compression spring is made from 3-mm diameter steel wire and has an active coil diameter that varies from 25 mm at the top to 50 mm at the bottom. The pitch (distance between coils) is throughout. There are four active coils. A force is applied to compress the spring and the stress always remains in the elastic range.

a. Determine which coil (top or bottom, or one in the middle) deflects to zero pitch first as the force is increased.

b. Determine the force corresponding to the deflection identified in part (a). In other words, determine the force causing displacement of 8 mm.

### Calculate the maximum achievable bridge out-of-balance voltage for an applied torque T of 103 N m given the following

Four strain gauges, with specification given below, are available to measure the torque on a cylindrical shaft 4 cm in diameter connecting a motor and load. (a) Draw clearly labelled….

### Find the gain and phase characteristics of the maintaining amplifier.

A solid-state capacitive humidity sensor has a capacitance given by: C = 1.7 RH + 365pF where RH is the percentage relative humidity. The sensor has an associated parallel resistance….

### calculate the mean velocity of the gas at maximum flow rate

A pitot tube is used to measure the mean velocity of high pressure gas in a 0.15 m diameter pipe. At maximum flow rate the mean pitot differential pressure is….