✠ What is a sonar used for?

✠ Energy transferred by ultrasound is used to clean a watch. What does the energy do?

° ⁿᵒ ˢᵖᵃᵐ ᵃⁿˢʷᵉʳˢ
° ⁿᵒ ˡⁱⁿᵏˢ
​

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Why does bubbling occur when vinegar mixed with baking soda

Give three examples of plant activities that are affected by circadian rhythms and natural fluctuations in the length of daylight?