What frequency fapproach is heard by a passenger on a train moving at a speed of 18. 0 m/s relative to the ground in a direction opposite to the first train and approaching it?.

Which of the following represents an upside-down image?

Assume similar data for the motion of the blood in your aorta. estimate how many beats of the heart it will take the blood to get from your heart to your brain. (assume that the distance from your heart to your brain is 30 cm)

Why don't you see your reflection in water with waves or repples