FM:L-2 pt1 - Dimensions, Units, and Properties of Fluids

A NASA engineer is calculating the amount of fuel needed for a spacecraft to break free from Earth's gravitational pull. To determine the total work required, which SI unit should be used to measure energy?

A civil engineer assesses the structural integrity of a dam by calculating the pressure exerted by the reservoir water on its walls. To accurately determine this effect, which SI unit should be used to measure force?

A meteorologist is monitoring atmospheric pressure variations to predict the formation of storms and weather patterns. To ensure accurate measurements, which SI unit should be used for pressure?

A traffic engineer is analyzing the efficiency of an intersection to improve traffic flow. A vehicle travels at a constant speed of 20 m/s, and the engineer needs to determine how long it takes to cross a 50-meter-wide intersection to optimize signal timing. Which SI unit should be used to measure the required time?

A pharmacist is preparing a precise dose of medication for a critically ill patient. Since the drug’s effectiveness and safety depend on the patient’s body weight, the pharmacist must carefully measure the required amount. To ensure accuracy, which SI unit should be used for mass?

A researcher in an international laboratory is studying historical measurement systems to understand global standardization. While reviewing historical agreements, they come across the Metric Convention Treaty of 1875 and question whether it originally established the SI system.

True or False?

• TRUE

• FALSE

Answer explanation

The treaty standardized metric units, but SI was formally adopted in 1960.

An engineering student is working on an international research project and notices that most scientific papers and engineering blueprints use SI units instead of the English system. They wonder if the English system is still widely accepted in scientific and engineering applications due to its historical significance.

True or False?

• TRUE

• FALSE

Answer explanation

The SI system is preferred due to its simplicity and ease of conversion.

A precision scientist working in a national metrology laboratory is calibrating an ultra-sensitive mass measurement device. Instead of using a physical reference standard, they rely on a fundamental constant of nature to define the kilogram. This constant is known as Planck’s constant.

True or False?

• TRUE

• FALSE

The fundamental SI unit for temperature is the degree Celsius (°C).

• TRUE

• FALSE

The ideal gas law (Pv = RT) applies best at low pressures and high temperatures.

• TRUE

• FALSE