Topic 3. Matter and Energy I.

A scalar quantity is a magnitude that just considers...

• direction and sense

• unit and direction

• sense and a number

• a number and a unit

What are examples of scalar quantities?

• Speed

• Velocity

• Distance

• Displacement

If this morning you left home to go to the school, and in the afternoon you got back... What was your displacement? The distance between your home and school is 10 km.

• 0 km

• 10 km

• Today I got virtual classes

• 20 km

A plane has a displacement of 30 miles at 28° to the southwest. What's its position using cardinal coordinates?

• First Quadrant

  x= +

  y= +

• Second Quadrant

  x= -

  y= +

• Third Quadrant

  x= -

  y= -

• Fourth Quadrant

  x= +

  y= -

In what quadrant the value of x is negative, while y is positive?

• Quadrant I

• Quadrant II

• Quadrant III

• Quadrant IV

• μ (micro)

• η (nano)

• θ (tetha)

• G (giga)

• k (kilo)

• M (mega)

• G (giga)

• T (tera)

• 96 dg

• 96 mg

• 96 μg

• 96 ηg