The average speed of a moving object during a given interval of time is always:

✅ B. Wilhelm Conrad Roentgen

✅ D. Hydrogen bond

✅ A. Mariana Trench

✅ A. Magnesium Sulfate

✅ D. ultraviolet

✅ B. South Pole

✅ A. red-brown liquid

✅ B. Anemometer