Which of the following sounds has the lowest frequency?* A. A female soprano singer at 2,000 hertz

B. A male voice at 500 hertz

C. The rumble of thunder at 75 hertz

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These models show the electron structures of two different nonmetal elements. which element is likely more reactive, and why? element 1 is more reactive because it has fewer electron shells and is toward the top of its group on the periodic table. element 1 is more reactive because it has more electrons in its valence shell and is farther to the right on the periodic table. element 2 is more reactive because it does not have a valence shell close to the nucleus, so it will attract electrons. element 2 is more reactive because it does not have a full valence shell, so it will attract electrons.

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest