2. Consider a watermelon that has side lengths x =- 4 cm, у —8.7 cm and z== 6.2 cm.Z(x, y7)a) Assuming that the interior of the watermelon is uniform, rankfrom least to greatest the electrical resistance along each axis.• A. R2 < Ry < Rx• B. Rz < Rx < Ry• C. Rx < Ry < Rz• D. Rx < Rz < Ryb) If the watermelon doubles in size along each axis (the cornershown in the image will be at (8 cm, 17.4 cm, 12.4 cm)), the re-sistance along each axis• A. Quadruples• B. Doubles• C. Stays the same• D. Halves• E. Is a quarter its original amount

Answered: Image /qna-images/answer/033d402c-ce00-4364-91cc-6747a3a65404.jpg

2. Consider a watermelon that has side lengths x = 4 cm, y = 8.7 cm and z=6.2 cm. (x, Y7) y a) Assuming that the interior of the watermelon is uniform, rank from least to greatest the electrical resistance along each axis. • A. Rz < Ry

2. Consider a watermelon that has side lengths x = 4 cm, y = 8.7 cm and z=6.2 cm. (x, Y7) y a) Assuming that the interior of the watermelon is uniform, rank from least to greatest the electrical resistance along each axis. • A. Rz < Ry

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 94PE: Construct Your Own Problem Consider a person working in an environment where electric currents might...

See similar textbooks

Similar questions

(a) Why are fish reasonably safe in an electrical storm? (b) Why are swimmers nonetheless ordered to get out of the water in the same circumstance?
If the drift velocity in a conductor is so small, then why does an auto battery influence the starter as soon as you turn the ignition switch?
Would your headlights dim when you start your car's engine if the wires in your automobile were superconductors? (Do not neglect the battery’s internal resistance.) Explain.
A long, inexpensive extension cord is connected from inside the house to a refrigerator outside. The refrigerator doesn't run as it should. What might be the problem?
An old lightbulb draws only 50.0 W, rather than its original 60.0 W, due to evaporative thinning of its filament. By what factor is its diameter reduced, assuming uniform thinning along its length? Neglect any effects caused by temperature differences.
You have a faculty position at a community college and are m (caching a class in automotive technology. You are deep in a discussion of using jumper cables to start a car with a dead battery from a car with a fresh battery. You have drawn the circuit diagram in Figure P27.16 to explain the process. The battery on the left is the live batten- in the correctly functioning car, with emf and internal resistance RL where the L. subscript refers to live. Its terminals are connected directly across those of the dead battery, in the middle of the diagram, with emf and internal resistance RD where the D subscript refers to "dead Then, the starter in the car with the dead battery is activated by closing the ignition switch, allowing the car to start. The resistance of the starter is Rs. A student raises his hand and asks, So is the dead battery being charged while the starter is operating? How do you respond?
The human body can exhibit a wide range of resistances to current depending on the path of the current, contact area, and sweatiness of the skin. Suppose the resistance across the chest from the left hand to the right hand is 1.0 106 . (a) How much voltage is required to cause possible heart fibrillation in a man, which corresponds to 500 mA of direct current? (b) Why should rubber-soled shoes and rubber gloves be worn when working around electricity?
Integrated Concepts (a) What voltage will accelerate electrons to a speed of 6.00107m/s ? (b) Find the radius of curvature of the path of a proton accelerated through this potential in a 0.500-T field and compare this with the radius of curvature of an electron accelerated through the same potential.
In places such as hospital operating rooms or factories for electronic circuit boards, electric sparks must be avoided. A prison standing on a grounded floor and touching nothing else can typically have a body capacitance of 150 pF, in parallel with a foot capacitance of 80.0 pF produced by the dielectric soles of his or her shoes. The person acquires static electric charge from interactions with Ills or her surroundings. The static charge flows to ground through the equivalent resistance of the two shoe soles in parallel with each other. A pair of rubber-soled street shoes can present an equivalent resistance of 5.00 103 M. A pair of shoes with special static-dissipative soles can have an equivalent resistance of 1.00 M. Consider the persons body and shoes as forming an RC circuit with the ground. (a) How long does it take the rubber-soled shoes to reduce a persons potential from 3.00 103 V to 100? (b) How long does it take the static-dissipative shoes to do the same thing?
You are still fascinated by the process of inkjet printing, as described in the opening storyline for this chapter. You convince your father to take you to his manufacturing facility to see the machines that print expiration dates on eggs. You strike up a conversation with the technician operating the machine. He tells you that the ink drops are created using a piezoelectric crystal, acoustic waves, and the PlateauRayleigh instability, which creates uniform drops of mass m = 1.25 108 g. While you dont understand the fancy words, you do recognize mass! The technician also tells you that the drops are charged to a controllable value of q and then projected vertically downward between parallel deflecting plates at a constant terminal speed of 18.5 m/s. The plates are = 2.25 cm long and have a uniform electric field of magnitude E = 6.35 104 N/C between them. Noting your interest in the process, the technician asks you, If the position on the egg at which the drop is to be deposited requires that its deflection at the bottom end of the plates be 0.17 mm, what is the required charge on the drop? You quickly get to work to find the answer.
Two different electrical devices have the same power consumption, but one is meant to be operated on 12G-V AC and the other on 240-V AC. (a) What is the ratio of their resistances? (b) What is the ratio of their currents? (c) Assuming its resistance is unaffected, by what factor will the power increase if a 120-V AC device is connected to 240-V AC?
Construct Your Own Problem Consider a person working in an environment where electric currents might pass through her body. Construct a problem in which you calculate the resistance of insulation needed to protect the person from harm. Among the things to be considered are the voltage to which the person might be exposed, likely body resistance (dry, wet, ...), and acceptable currents (safe but sensed, safe and unfelt, ...).