question: Officer Ricky points a radar gun at a car. A slow car likely has _____ frequency waves bouncing off of it.
choices.text: higher lower
choices.label: A B
para: A: As the car approaches the radar gun, the reflected microwaves get bunched up in front of the car. Therefore, the waves the receiver detects have a higher frequency than they would if they were being reflected from a stationary object. The faster the car is moving, the greater the increase in the frequency of the waves.
para_anno.effect_prop: frequency of waves
para_anno.cause_dir_str: faster
para_anno.effect_dir_str: increase
para_anno.cause_dir_sign: MORE
para_anno.effect_dir_sign: MORE
para_anno.cause_prop: faster car is moving
question_anno.more_effect_dir: higher
question_anno.less_effect_dir: lower
question_anno.less_cause_prop: car
question_anno.more_effect_prop: frequency of waves
question_anno.less_effect_prop: frequency of waves
question_anno.less_cause_dir: frequency of waves