Given:
A. today's date
B. a train travelling at 80 km/h
C. the force of gravity
D. the temperature outside
To find whether the given quantity is scalar or vector.
Step-by-step explanation:
A. Today's date is a scalar quantity as no direction is associated with it.
B. A train travelling at 80 km/h is a scalar quantity as no direction is clearly specified.
C. The force of gravity is a vector quantity as the force has both magnitude and direction.
D. Temperature has only magnitude, so it is a scalar quantity.
Final Answer
A. today's date - scalar
B. a train travelling at 80 km/h - scalar
C. the force of gravity - vector
D. the temperature outside-scalar