Answer:With this system, blood always flows in only one direction inside the heart. There are also valves at the bottom of the large arteries that carry blood away from the heart: the aorta and the pulmonary artery. These valves keep the blood from flowing backward into the heart once it has been pumped out.
Explanation:
Answer:
Independent variable: The diameter of the wooden pins.
Dependent variable: The depth of the pins in the sand.
Control variable: height of 15 cm at which the pins will be thrown, boxes containing 30 kg of sand and weights of 80 grams.
Explanation:
An independent variable is one that does not need the influence of another variable to happen and that, its variation, influences that a measurable result occurs. In this case, as we know that the depth of the wooden pins is measured according to the influence of the diameter of these pins, we can say that the diameter of the wooden pins is the independent variable.
The dependent variable, on the other hand, is one that shows a measurable result through the influence of the independent variable. In this case, we can say that the depth of the wooden pins in the sand is the independent variable.
The control variable, in turn, is the factor that establishes an egalitarian environment in which the research will be established. In this case, the control variable is the height of 15 cm at which the pins will be thrown, the boxes containing 30kg of sand and the weights of 80 grams.
Slouched and in fetal position.
Probably A (?) Because the chef is using more than required, meaning it'll cost more to make.
Answer:
B. Study until bedtime, wake up early, eat breakfast, and walk to school with her best friend
Explanation:
Process of elimination. If she wants to bring her stress level down, then we already know that we can eliminate choice A. Stay up late, drink a lot of coffee, and cram as much of the textbook as possible into her head, because that will cause her a lot of stress, especially during the exam, when she'd be exhausted. So choice A isn't a good selection. Now, we have options B. Study until bedtime, wake up early, eat breakfast, and walk to school with her best friend and C. Study until bedtime, wake up early, and study some more until her mom drives her to school. Well, if she wants to clear her mind of everything and make a good grade, she<em> has to</em> eat breakfast! If we choose C, then she'll skip breakfast, and that's not good for her! So we know that it has to be B.
