Tutor profile: Anmol P.
In hospital settings, it is normal for health care workers to stop hearing beeping noises from machines that are signaling something is wrong. What is this phenomenon called?
This is an example of habituation. Habituation is when one's response to a stimulus diminishes after being exposed to that stimulus multiple times.
True or false: blood leaving the right ventricle supplies the lung and performs diffusion of oxygen and carbon dioxide.
False. The blood leaving the right ventricle through the pulmonary artery does go to the lungs in order to get oxygenated, but it is not the same blood that supplies the lungs with oxygen and removes carbon dioxide. All of the blood leaving the left ventricle is oxygenated and supplies the entire body (including the lungs and heart) with oxygenated blood and helps the lungs get rid of carbon dioxide.
Tyler has two shoelaces: a short one (S) and a long one (L). The long shoelace is 5 cm longer than the short shoelace. The length of both shoelaces adds up to 27 cm. How long is the short shoelace?
This problem can be solved using a system of equations. You know that both shoelaces add up to 27 cm, so you can set up the equation: S + L = 27cm Next, you know that the long shoelace is 5 cm longer than short shoelace, so S + 5cm = L You can then plug in the second equation into the first equation so it would look like this: S + (S + 5cm) = 27 cm Now, you can solve for S to fine the length of the short shoelace. You can add like variables, so you get: 2S + 5cm = 27cm If you subtract both sides by 5cm, you get 2S = 22 cm Next, divide both sides by 2, and you get S = 11 cm. Therefore, the short shoelace is 11 cm long.
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