Câu 1: Chuyển động cơ học là gì? Lấy 2 ví dụ về chuyển động cơ học và chỉ rõ vật được chọn làm vật mốc

Sawyer is studying diffraction. he draws a diagram of a plane wave to show how light waves travel. which best describes sawyer’s error? the wave fronts should be perpendicular to the direction in which the waves move. the arrow showing the direction of movement of the waves should be pointing to the left. the arrow showing the direction of movement of the waves should be pointing downward. the wave fronts should be both parallel and perpendicular to the direction in which the waves move.

Using a pedometer, you walk 3000 steps in 20 minutes, so your speed is 150 steps/min. each of your steps is 0.7 m long. what is your speed? 150 steps/min=/s=/h

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse