physical quantities Flashcards
What is a physical quantity?
A physical quantity is a property of a physical system that can be measured and expressed numerically.
True or False: All physical quantities have both a magnitude and a unit.
True
Fill in the blank: The unit of force in the SI system is _____ .
Newton
What are the two main types of physical quantities?
Scalar quantities and vector quantities.
Multiple choice: Which of the following is a scalar quantity? A) Velocity B) Mass C) Force
B) Mass
Define a scalar quantity.
A scalar quantity has only magnitude and no direction.
Define a vector quantity.
A vector quantity has both magnitude and direction.
What is the SI unit for energy?
Joule
True or False: Temperature is a scalar quantity.
True
Fill in the blank: The unit of pressure is _____ .
Pascal
What is the difference between mass and weight?
Mass is a measure of the amount of matter, while weight is the force exerted by gravity on that mass.
Multiple choice: Which of the following is a vector quantity? A) Speed B) Distance C) Acceleration
C) Acceleration
What is the unit of electric current?
Ampere
True or False: Speed is a vector quantity.
False
Fill in the blank: The unit of frequency is _____ .
Hertz
What is a derived quantity?
A derived quantity is a physical quantity that is derived from base quantities.
Name the base quantity that measures length.
Meter
Multiple choice: Which of the following is not a base quantity? A) Length B) Time C) Speed
C) Speed
What is the SI unit for luminous intensity?
Candela
True or False: Area is a scalar quantity.
True
Fill in the blank: The unit of power is _____ .
Watt
What is the base unit for time in the SI system?
Second
Multiple choice: Which of the following is a base quantity? A) Temperature B) Force C) Energy
A) Temperature
What is the SI unit for amount of substance?
Mole
True or False: Volume is a vector quantity.
False
Fill in the blank: The unit of electric charge is _____ .
Coulomb
What is the relationship between mass and weight on Earth?
Weight is equal to mass multiplied by the acceleration due to gravity (Weight = mass × g).
