(Hearing Science Foundation Skills by Diana C. Emanuel) Flashcards
Mass (m) (commonly measured as kilograms or grams)
The amount of matter that is present in a substance
Density (ρ or D)
The amount of matter in a given unit of volume.
ρ
Density
___ is mass affected by the force of gravity
Weight
With grocery store items, various amounts of mass are reported in units of mass such as pounds ounces kilograms or grams but they are listed as the “weight” of the item. The direct translation between weight and mass in this application is faulty. “Net weight” should actually be reported (in a force unit, such as ___)
newtons
If the mass and volume of a substance are known, the __ can be calculated. What is the formula?
Density (ρ or D). Density = m / V
Kinematics is the relationship among __, __, __, __. Hint, the first three are vectors and the fourth is a scalar.
displacement (d)
velocity (v)
acceleration (a)
time (t)
The density of a substance can change in response to changes in __ or __
Temperature or pressure
__ the branch of physics that describes the motion of objects in space without considering the cause of the motion
Kinematics
Physical characteristics for which it is sufficient to provide only a magnitude and a unit are called __
Scalars
Physical characteristics that are described by a magnitude, a unit, and a direction are called __
Vectors
When you specify a direction for speed, speed becomes a __
Velocity
__ is defined as a change in position. When talking about this, we are only interested in the change from the original position to the final position. We are not interested in the path the object took to get there.
Displacement
__ is defined as the rate of change in displacement
Velocity
__ __ is calculated from the displacement and the amount of time it took for the displacement to occur
Average velocity
