Question

Which of the following is wrongly matched?
A Barometer-Pressure
B Lactometer-Milk
C Coulomb's law-charges
D Humidity - Calorimeter

Answer 1

Hint: Pressure is measured by a barometer and milk purity is measured by a lactometer. The laws of Coulombs are related to charges. A calorimeter is a device used to measure the amount of heat transferred to an object or from it. Most students probably don't remember using such a fancy piece of calorimeter known as equipment.

Complete solution:
Barometer-Pressure
Use a barometer to obtain a pressure reading, collect the pressure reading on a weather website or find a weather map that shows high- and low-pressure areas. If feasible, find the exact pressure reading in millibars. . Millibars are the measurement at a specific location of the weight of the atmosphere.

Lactometer-Milk
Lactometer. A special type of hydrometer is the lactometer. It is constructed and graduated so that the lactometer reading is related to the specific gravity of milk at a specified temperature on the ratio of milk to water weight of a unit volume. Apr 17, 2012. The purpose of the lactometer test is to detect a change in the density of such adulterated milk. In conjunction with the Gerber butterfat test, it allows the milk processor to calculate the total solid milk.

Coulomb's law-charges
The magnitude of the electrostatic force F is directly proportional to the product of the magnitudes of the charges between the two point charges q1 and q2 and inversely proportional to the square of the distance between them. Similarly, charges repel each other and opposite charges attract each other.

Humidity – Calorimeter:
A calorimeter is an object used in the calorimetry or heat measurement process for chemical reactions or physical changes, as well as for heat capacity measurements. Among the most common types are differential scanning calorimetry, isothermal microcalorimetry, titration calorimetry, and accelerated rate calorimetry.
Calorimeter is used to measure the heat. Hence it has no relation with humidity.

Hence, option D is the correct answer.

Note:
In order to derive the heat transfer associated with changes in its due state, calorimetry is the science or act of measuring changes in state variables of a body. Millibars are the measurement of the atmosphere's weight at a particular location. The lactometer test is designed to detect a change in the density of such adulterated milk.