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A person is straining to lift a large crate, without success because it is too heavy. We denote the forces on the crate as follows: P is the upward force the person exerts on the crate, C is the vertical contact force exerted on the crate by the floor, and W is the weight of the crate. How are the magnitudes of these forces related while the person is trying unsuccessfully to lift the crate?Answer and explain in your scratch paper. Answers without explanations will not get credit.

The figure shows two packages that start sliding down a 20° ramp from rest a distance along the ramp from the bottom. Package A has a mass of 5.0 kg and a coefficient of kinetic friction 0.20 between it and the ramp. Package B has a mass of 10 kg and a coefficient of kinetic friction 0.15 between it and the ramp. How long does it take package A to reach the bottom?Answer and explain in your scratch paper. Answers without explanations will not get credit. Show all your work.

What will earn a “0” in the MLA Format section of the rubric?

Which of the following components must be included in your annotation?

Which of the following best describes a well-written argumentative paragraph for this assignment?

12. What region of the body is used to describe pain that occurs above the stomach?

A freshwater pond has pH 7, rainwater has pH 5, and a swimming pool is maintained at pH 8. Rank these from most acidic to most basic:

Each of the three beakers below have different concentrations of hydrogen ions and hydroxide ions. Click on the beaker that contains a base. 

You are camping in the mountains. At night, the air temperature drops quickly, but the nearby lake stays relatively warm and keeps the campsite from getting too cold. The next morning, the lake is still cool even though the sun has been shining on it for hours. Which of the following statements best explain these observations? Select all that apply.

Place the steps of heat transfer between ice and lemonade in the correct order (1–4):