Correct Answer:
Option B - A hydrometer is an instrument used for measuring the relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity.
Fathometer is a depth finder that uses sound waves to determine the depth of water. A hygrometer is a meteorological instrument that is used to measure the humidity of the air. The common way these devices work by using a material that attracts moisture.
A hypsometer is an instrument for measuring height or elevation.
B. A hydrometer is an instrument used for measuring the relative density of liquids based on the concept of buoyancy. They are typically calibrated and graduated with one or more scales such as specific gravity.
Fathometer is a depth finder that uses sound waves to determine the depth of water. A hygrometer is a meteorological instrument that is used to measure the humidity of the air. The common way these devices work by using a material that attracts moisture.
A hypsometer is an instrument for measuring height or elevation.