Answer: Compressions and Rarefractions
Explanation: places where particles of a medium crowd close together are compressions and places where they spread farther apart are called rarefactions. The more energy the wave has the closer together the compressions can be and the farther apart the rarefactions will be.
Answer:
I think the answer would be British Thermal Unit
Explanation:
It equals one degree Fahrenheit and the equation for it is 1.055 × 103 joules.
The circulatory system, composed of the heart, veins,
arteries, capillaries, and blood, is a feature common in most vertebrates
(animals with a distinct spine). In these animals, blood never leaves the
confines of the heart and blood vessels, making theirs a closed circulatory
system. In regard to your question, the best answer is B. Some animals have
hearts that don’t have atria, while others don’t even have a distinct heart at
all.