Temperature measurement can be divided into two categories that is, electrical and non-electrical methods. List three (3) types of thermometer in each case.

here are the solutions to your questions.

2. a. List the three (3) types of measuring instruments and give an example for each.
The question refers to characteristics of measuring instruments:

• i) Accuracy: This refers to how close a measurement is to the true or accepted value.
  • Example: A thermometer that consistently reads $25.0^\circ\text{C}$ when the actual temperature is $25.0^\circ\text{C}$ is accurate.
• ii) Precision: This refers to the reproducibility or consistency of repeated measurements. It indicates how close multiple measurements are to each other, regardless of their closeness to the true value.
  • Example: A scale that repeatedly measures a 10 kg object as 10.2 kg, 10.2 kg, and 10.2 kg is precise, even if it's not accurate.
• iii) Resolution: This is the smallest change in the measured quantity that an instrument can detect and display.
  • Example: A digital voltmeter that can display readings to three decimal places (e.g., 1.234 V) has a higher resolution than one that only displays to one decimal place (e.g., 1.2 V).

2. b. Temperature measurement can be divided into two categories that is, electrical and non-electrical methods. List three (3) types of thermometer in each case.

• Electrical Thermometers:
  1. Resistance Temperature Detector (RTD): Measures temperature based on the change in electrical resistance of a metal (e.g., platinum).
  2. Thermistor: Measures temperature based on the change in electrical resistance of a semiconductor material.
  3. Thermocouple: Measures temperature based on the voltage generated at the junction of two dissimilar metals.
• Non-Electrical Thermometers:
  1. Liquid-in-glass thermometer: Measures temperature based on the thermal expansion of a liquid (e.g., mercury or alcohol) in a sealed glass tube.
  2. Bimetallic thermometer: Measures temperature based on the differential thermal expansion of two bonded metals, causing a strip to bend.
  3. Gas thermometer: Measures temperature based on the change in pressure or volume of a gas.

2. c. A second order is described by the differential equation $0.15 \frac{d^2y}{dt^2} + 0.3 \frac{dy}{dt} + 5y = 5x$, where $x$ is the input and $y$ the output. By comparing the equation with the standard second order form, determine:

The given differential equation is:

$$0.15 \frac{d^2y}{dt^2} + 0.3 \frac{dy}{dt} + 5y = 5x$$

The standard form of a second-order differential equation is:

$$\frac{d^2y}{dt^2} + 2\zeta\omega_n \frac{dy}{dt} + \omega_n^2 y = K'x$$

To compare, divide the given equation by 0.15:

$$\frac{d^2y}{dt^2} + \frac{0.3}{0.15} \frac{dy}{dt} + \frac{5}{0.15} y = \frac{5}{0.15} x$$ $$\frac{d^2y}{dt^2} + 2 \frac{dy}{dt} + \frac{100}{3} y = \frac{100}{3} x$$