Joe is interested in observing how the height of a ramp affects the speed of his toy car when he releases it at the top of the ramp. He sets up 3 ramps, one at a 15 cm from the ground, one at 20 cm, and one at 25 cm. He then times how long his car takes to travel a specific distance from the time he releases it. He determines that the car has the greatest speed when the ramp is 20 cm off the ground. Use this information to answer Questions 6-8 below:
6.
What is the independent variable in this experiment?

7.
What is the dependent variable in this experiment?

8.
How many treatments did Joe have?

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

  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

answer(20) psi;