Which is a valid velocity reading for an object? 45 m/s 45 m/s north 0 m/s south 0 m/s

Vector quantities are those quantities which have magnitude and direction both at the same time. Velocity is a vector quantity having magnitude as well as direction.

hence the correct choice are

45 m/s north

Since 45 m/s  represent the magnitude of velocity of the object and north  represent the associated direction for the object.

45 m/s north

Explanation:

  the unit of the measure =

explanation:

  the property that is quantified by the energy needed per of material to raise the temperature by one.

  si unit of energy = joule (j)

  si unit of temperature = kelvin (k)

  si unit of mass of material = kilogram (kg)

the property that is quantified by the energy needed per of material to raise the temperature by one is called specific heat.

the unit of specific heat is

well clustered together.

points close on a scatter diagram