Physics 121 UW Question and answers
100% correct 2025
In the study of physics, what distinguishes a scalar from a vector?
a ) Nothing—the terms "vector" and "scalar" are different names for the same
thing.
b ) A scalar is specified with a single number, but a vector is specified using
both a magnitude and a direction.
c ) Scalars have both a magnitude and a direction, but vectors have only a
magnitude.
d ) A scalar must always be positive, but vectors can be positive, negative, or
zero.
e ) A scalar is a dimensionless number, while vectors are numbers that have
dimensions. - correct answer ✔A scalar is specified with a single number,
but a vector is specified using both a magnitude and a direction.
Which types of geometrical symmetry does a sphere have?
a ) Rotational symmetry
b ) Reflection symmetry
c ) Translational symmetry - correct answer ✔Rotational and Reflection
Symmetry
Which of the following is a vector?
a ) Mass
b ) Distance
c ) Displacement
d ) Speed
e ) Temperature - correct answer ✔Displacement
100% correct 2025
In the study of physics, what distinguishes a scalar from a vector?
a ) Nothing—the terms "vector" and "scalar" are different names for the same
thing.
b ) A scalar is specified with a single number, but a vector is specified using
both a magnitude and a direction.
c ) Scalars have both a magnitude and a direction, but vectors have only a
magnitude.
d ) A scalar must always be positive, but vectors can be positive, negative, or
zero.
e ) A scalar is a dimensionless number, while vectors are numbers that have
dimensions. - correct answer ✔A scalar is specified with a single number,
but a vector is specified using both a magnitude and a direction.
Which types of geometrical symmetry does a sphere have?
a ) Rotational symmetry
b ) Reflection symmetry
c ) Translational symmetry - correct answer ✔Rotational and Reflection
Symmetry
Which of the following is a vector?
a ) Mass
b ) Distance
c ) Displacement
d ) Speed
e ) Temperature - correct answer ✔Displacement
