Acar starts from rest and uniformly accelerates to a speed of 30 mi/h in 6 s. the car moves north the entire time. which option correctly lists a vector quantity from the scenario?

speed: 30 mi/h

acceleration: 5 mi/h/s north

distance: 30 mi

velocity: 5 mi/h/s north

acceleration: 5 mi/h/s north

Explanation:

A quantity can be either vector quantity or scalar quantity, a vector  quantity is a quantity with both magnitude and direction while a scalar quantity has magnitude only.

Examples of vector quantities include; velocity, acceleration, displacement , etc.

Acceleration is the rate of change of an object's velocity per unit of time. It is given by the formula; Velocity/time

Therefore in this case; a = 30 mi/h /6 s

                                         = 5 mi/h/s

Therefore;

Acceleration = 5 mi/h/s

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.