question: If Mona is bouncing radar waves off a test car when training to be a policewoman and she notices the frequency of the waves returning to her radar gun is higher then it was before, what is happening to the car she is pointing the gun at?
choices.text: decreasing in speed increasing in speed
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: increase in the frequency of the 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 the car is moving
question_anno.more_effect_dir: frequency returning to gun is higher
question_anno.less_cause_prop: car
question_anno.more_effect_prop: waves