Exploring Units and Dimensions in Physics

What is the SI unit of length?

• meter

• millimeter

• centimeter

• kilometer

Define dimensional analysis and its purpose.

• Dimensional analysis focuses solely on the numerical values without considering units.

• Dimensional analysis is a technique for converting measurements and verifying equations by analyzing their dimensions.

• Dimensional analysis is used exclusively in chemistry for balancing equations.

• Dimensional analysis is a method for measuring temperature only.

Convert 5 kilometers to meters.

• 500 meters

• 50 kilometers

• 5,000 kilometers

• 5000 meters

What are the fundamental dimensions in physics?

• Frequency, Charge, Work

• Velocity, Force, Energy

• Length, Mass, Time, Electric Current, Temperature, Amount of Substance, Luminous Intensity

• Volume, Pressure, Density

Give an example of a derived unit and its SI representation.

• Joule (J)

• Pascal (Pa)

• Watt (W)

• Newton (N)

What is the SI unit of mass?

• gram

• pound

• kilogram

• ounce

Explain the concept of measurement errors.

• Measurement errors are discrepancies between the true value and the measured value, caused by factors like instrument limitations and human mistakes.

• Measurement errors are the same as systematic errors.

• Measurement errors are always caused by environmental factors.

• Measurement errors only occur in scientific experiments.

How do you convert 100 centimeters to meters?

• 1.5 meters

• 50 centimeters

• 200 centimeters

• 1 meter

What is the SI unit for time?

• second

• day

• minute

• hour

List the fundamental dimensions used in physics.

• Density, Frequency, Energy

• Velocity, Pressure, Force

• Acceleration, Work, Power

• Mass, Length, Time, Electric Current, Temperature, Amount of Substance, Luminous Intensity