Checkpoint Science: Thinking and Working Scientifically
Question 1 of 5
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Free Checkpoint Science Q & A Practice 1 of 5 free Checkpoint-standard exercises in this section
Florence wants to find out whether the length of a pendulum affects the time it takes to complete 10 swings. She sets up the four pendulums shown below. Each pendulum is released from rest at the angle shown.

10°P40 cm50 g20°Q80 cm50 g10°R80 cm50 g10°S40 cm100 gBoxes show length of string and mass of bob.


Which two pendulums should Florence compare so that her investigation is a fair test?
Select one option.
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