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CE A pan half-filled with water is placed near the run of
Chapter 15, Problem 79GP(choose chapter or problem)
Problem 79GP
CE A pan half-filled with water is placed near the run of a rotating turntable. Is the normal to the surface of the water in the pan tilted outward away from the axis of rotation, tilted inward toward the axis of rotation, or is the water surface level and the normal vertical? (Refer to Problem 68 in Chapter 6 for a similar situation.)
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Chapter 6 Problem 68
• CE BIO Gravitropism As plants grow, they tend to align their stems and roots along the direction of the gravitational field. This tendency, which is related to differential concentrations of plant hormones known as auxins, is referred to as gravitropism. As an illustration of gravitropism, experiments show that seedlings placed in pots on the rim of a rotating turntable do not grow in the vertical direction. Do you expect their stems to tilt inward—toward the axis of rotation—or outward—away from the axis of rotation?
Questions & Answers
QUESTION:
Problem 79GP
CE A pan half-filled with water is placed near the run of a rotating turntable. Is the normal to the surface of the water in the pan tilted outward away from the axis of rotation, tilted inward toward the axis of rotation, or is the water surface level and the normal vertical? (Refer to Problem 68 in Chapter 6 for a similar situation.)
.
Chapter 6 Problem 68
• CE BIO Gravitropism As plants grow, they tend to align their stems and roots along the direction of the gravitational field. This tendency, which is related to differential concentrations of plant hormones known as auxins, is referred to as gravitropism. As an illustration of gravitropism, experiments show that seedlings placed in pots on the rim of a rotating turntable do not grow in the vertical direction. Do you expect their stems to tilt inward—toward the axis of rotation—or outward—away from the axis of rotation?
ANSWER:
Solution 79GP
Step 1 of 2
Here the objective is to reach a conclusion about the normal to the surface of the water in the pan. We have to check whether the normal is tilted outward away from the axis of rotation or the normal is tilted inwards towards the axis of rotation or both are vertical.