01 Scientific Thinking Review

Each pizza at your party has 12 slices. Each person eats 4 slices. 25 people are coming to your party. What are the unit factors (check all that apply)

• 12 slices = 1 pizza

• 25 people = 1 party

• 4 slices = 1 person

• 1 pizza = 4 slices

• 4 pizzas = 1 party

How many seconds are there in one month of 31 days? Select all the unit factors you will need to solve the problem (select all that apply)

• 1 year = 12 months

• 60 seconds = 1 minute

• 60 minutes = 1 hour

• 365 days = 1 year

• 24 hours = 1 day

V = IR (voltage = current x resistance). Solve for R

• R = I/V

• R = V/I

• V = IR

You perform an experiment with a car on a ramp. A string with a mass is tied to one end. You change the amount of the mass tied to the end of the string and measure the change in acceleration. Which variables go in which column of your data table?

• Mass in column 1, acceleration in column 2

• Acceleration in column 1, mass in column 2

• Length of string in column 1, acceleration in column 2

You perform an experiment with a car on a ramp. A string with a mass is tied to one end. You change the amount of the mass tied to the end of the string and measure the change in acceleration. Which variables go in which axes of your graph?

• Mass on x axis, acceleration on y axis

• Acceleration on x axis, mass on y axis

• Length of string on x axis, acceleration on y axis

You perform the Motion of a Battery-Powered Vehicle experiment. The column headings for your data table are Time (s) and Position (m). At 0s, the position is 0m, At 4.5s, the position is 15m. Using these two points, you calculate the slope. Which of these is the correct answer (two sig figs)

• 3.3

• 3.3 m/s

• 3.3 s/m

One US dollar = 6.80 Chinese yuan (as of 9-20). How many dollars is one yuan?

• $6.80

• $ 0.147

• $ 1.00

y = kx. What happens to the value of y if x is tripled?

• 1/3 as much as before

• 3 times as much as before

• Same as before, no change

y = k/x. What happens to the value of y if x is tripled?

• 1/3 as much as before

• 3 times as much as before

• Same as before, no change

F = ma. F is ___ to m

• directly proportional

• inversely proportional

• proportional to the square

• inverseley proportional to the square