/*! This file is auto-generated */ .wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none} Problem 78 On a cool (4.0\(^\circ\)C) Satur... [FREE SOLUTION] | 91Ó°ÊÓ

91Ó°ÊÓ

On a cool (4.0\(^\circ\)C) Saturday morning, a pilot fills the fuel tanks of her Pitts S-2C (a two-seat aerobatic airplane) to their full capacity of 106.0 L. Before flying on Sunday morning, when the temperature is again 4.0\(^\circ\)C, she checks the fuel level and finds only 103.4 L of gasoline in the aluminum tanks. She realizes that it was hot on Saturday afternoon and that thermal expansion of the gasoline caused the missing fuel to empty out of the tank's vent. (a) What was the maximum temperature (in \(^\circ\)C) of the fuel and the tank on Saturday afternoon? The coefficient of volume expansion of gasoline is \(9.5 \times 10{^-}{^4} K{^-}{^1}\). (b) To have the maximum amount of fuel available for flight, when should the pilot have filled the fuel tanks?

Short Answer

Expert verified
The maximum temperature was 30.0°C. The pilot should have filled the tanks in the morning when it was cooler.

Step by step solution

01

Understanding the Problem

The initial volume of gasoline is 106.0 L at a temperature of 4.0°C, and it reduces to 103.4 L, at the same temperature. The change indicates thermal expansion has taken place, and some gasoline overflowed. The coefficient of volume expansion is provided, which helps in calculating the temperature change that resulted in this overflow.
02

Volume Expansion Formula

The formula for volume expansion is given by \[\Delta V = \beta \cdot V_0 \cdot \Delta T\]where \(\Delta V\) is the change in volume, \(\beta\) is the coefficient of volume expansion, \(V_0\) is the initial volume, and \(\Delta T\) is the change in temperature.
03

Identify the Change in Volume

The change in volume, \(\Delta V\), is calculated as the difference between the initial volume \((V_0 = 106.0\, L)\) and the final volume \((V_f = 103.4\, L)\). Thus, \(\Delta V = V_0 - V_f = 106.0\, L - 103.4\, L = 2.6\, L\).
04

Solve for Temperature Change

Rearrange the volume expansion formula to solve for \(\Delta T\):\[\Delta T = \frac{\Delta V}{\beta \cdot V_0}\]Substitute the known values:\[\Delta T = \frac{2.6\, L}{(9.5 \times 10^{-4}\, K^{-1}) \cdot 106.0\, L}\]Perform the calculation:\[\Delta T \approx 26\, \text{K}\]
05

Calculate Maximum Temperature

To find the maximum temperature \((T_{max})\) on Saturday afternoon, add the temperature change \(\Delta T\) to the initial temperature:\[T_{max} = T_{initial} + \Delta T = 4.0\, ^\circ \text{C} + 26\, K = 30.0\, ^\circ \text{C}\]
06

Determine the Best Time to Fill the Tank

To maximize the amount of fuel available for flight, the pilot should fill the fuel tanks when the temperature is the lowest. By doing this, the thermal expansion effect will be minimized, preventing any overflow when the temperature rises. Therefore, the pilot should have filled the tanks in the morning when it was cooler.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Over 30 million students worldwide already upgrade their learning with 91Ó°ÊÓ!

Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Volume Expansion Formula
The Volume Expansion Formula is a key concept in understanding how fluids like gasoline respond to temperature changes. When the temperature of a substance increases, its volume generally increases as well. This relationship is captured by the equation:
  • \( \Delta V = \beta \cdot V_0 \cdot \Delta T \)
Here, \( \Delta V \) represents the change in volume, \( V_0 \) is the initial volume of the substance, \( \beta \) is the coefficient of volume expansion, and \( \Delta T \) signifies the change in temperature. This formula allows us to calculate how much a substance will expand, based on these parameters.
In the context of the exercise, the initial volume \( V_0 \) is 106.0 L, and due to thermal expansion, the volume decreases to 103.4 L after some gasoline overflowed. By applying the volume expansion formula, we calculate the temperature change that resulted from a hot afternoon, helping us to understand the event's cause.
Coefficient of Volume Expansion
The Coefficient of Volume Expansion, \( \beta \), is a crucial factor that determines how much a given volume of a substance will expand when heated. It is specific to the material in question. For gasoline, the coefficient of volume expansion is provided as \( 9.5 \times 10^{-4} \, K^{-1} \).
This means that for each degree Kelvin (K) temperature increase, the volume of gasoline expands by \( 9.5 \times 10^{-4} \) times its original volume. This coefficient allows us to calculate the temperature change that led to the volume shrinkage observed on Sunday morning. By using the coefficient in the volume expansion formula, students can rearrange the equation to solve for the temperature change \( \Delta T \), illustrating how material and temperature interact.
Aerobatic Airplane Fuel Management
Managing fuel in an aerobatic airplane involves understanding thermal expansion to prevent fuel loss during temperature changes. In aviation, the efficiency and safety of a flight can depend greatly on proper fuel management.
On a hot day, gasoline expands due to temperature increase. If the tanks were completely filled, as in the Pitts S-2C scenario, expanding gasoline can lead to overflow through vents, leading to needless fuel loss.
Pilots can manage this by timing the refueling process. Filling the fuel tanks during cooler parts of the day, like in the morning or late evening, ensures maximum fuel stays in the tanks as temperatures rise. This practice not only optimizes fuel capacity but also maintains the balance and performance of the plane during flight. Hence, understanding and applying thermal expansion principles can critically enhance an aircraft's operational efficiency.

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

An electric kitchen range has a total wall area of 1.40 m\(^2\) and is insulated with a layer of fiberglass 4.00 cm thick. The inside surface of the fiberglass has a temperature of 175\(^\circ\)C, and its outside surface is at 35.0\(^\circ\)C. The fiberglass has a thermal conductivity of 0.040 W /m \(\cdot\) K. (a) What is the heat current through the insulation, assuming it may be treated as a flat slab with an area of 1.40 m\(^2\)? (b) What electric-power input to the heating element is required to maintain this temperature?

You have 1.50 kg of water at 28.0\(^\circ\)C in an insulated container of negligible mass. You add 0.600 kg of ice that is initially at -22.0\(^\circ\)C. Assume that no heat exchanges with the surroundings. (a) After thermal equilibrium has been reached, has all of the ice melted? (b) If all of the ice has melted, what is the final temperature of the water in the container? If some ice remains, what is the final temperature of the water in the container, and how much ice remains?

A Foucault pendulum consists of a brass sphere with a diameter of 35.0 cm suspended from a steel cable 10.5 m long (both measurements made at 20.0\(^\circ\)C). Due to a design oversight, the swinging sphere clears the floor by a distance of only 2.00 mm when the temperature is 20.0\(^\circ\)C. At what temperature will the sphere begin to brush the floor?

Conventional hot-water heaters consist of a tank of water maintained at a fixed temperature. The hot water is to be used when needed. The drawbacks are that energy is wasted because the tank loses heat when it is not in use and that you can run out of hot water if you use too much. Some utility companies are encouraging the use of on-demand water heaters (also known as flash heaters), which consist of heating units to heat the water as you use it. No water tank is involved, so no heat is wasted. A typical household shower flow rate is 2.5 gal/min (9.46 L/min) with the tap water being heated from 50\(^\circ\)F (10\(^\circ\)C) to 120\(^\circ\)F (49\(^\circ\)C) by the on-demand heater. What rate of heat input (either electrical or from gas) is required to operate such a unit, assuming that all the heat goes into the water?

An insulated beaker with negligible mass contains 0.250 kg of water at 75.0\(^\circ\)C. How many kilograms of ice at \(-\)20.0\(^\circ\)C must be dropped into the water to make the final temperature of the system 40.0\(^\circ\)C?

See all solutions

Recommended explanations on Physics Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.