Purchase Solution

Spacing of Rails/Removal of Heat

Not what you're looking for?

Ask Custom Question

1. Segments of 12mt long steel rails are laid end to end when the temperature is -12 degree C. A space is left between rail segments to allow for thermal expansion.

a. If they are to just touch when the temp is 33degree C, the spacing is ---------

2. A freezer has a coefficient of performance of 2.40 and can convert 1.80 kg of water at 25 degree C to ice at -5 degree c in 1 hr.

a. The heat removed per hour is ------------ and

b. The electrical energy consumed per hour is---------

3. Divers are sealed in deep-dive research vessel on the deck of the mother ship and lowered to a depth of 4000 mt into the ocean. The density of sea water = 1.03 * 10^3 kg/mt^3

a. the force of the water on a 30.5 cm diameter port window is ------------N or --------atm

Purchase this Solution
Solution Summary

343 words answer 3 questions on thermal expansion, coefficient of performance and the force of water on a submerged window.

Solution Preview

1. a. Given,

Length of rail, L = 12mt

Initial temperature, T1 = -12 degree C
Final Temperature, T2 = 33 dgree C

Change in temp, dT = 33 - (-12) = 45 degree C

The change in length of the steel road is given by,
dL = alpha * L * dT

where alpha is the coefficient of linear expansion of steel.

dL = alpha * 12 * 45
dL = alpha * 540

Let alpha for steel = 11* 10^-6 /degree C

Therefore, dL = 11*10^-6 * 540

==> dL = 5.940 * 10^-3 m
==> dL = 5.9 mm

Therefore, space to be left ...

Purchase this Solution
Free BrainMass Quizzes
Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

The Moon

Test your knowledge of moon phases and movement.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Intro to the Physics Waves

Some short-answer questions involving the basic vocabulary of string, sound, and water waves.

Basic Physics

This quiz will test your knowledge about basic Physics.

View More Free Quizzes
Related BrainMass Solutions

  • Rate of Heat Removal Problem

    Determine the rate of heat removal from the refrigerated space and the temperature of the refrigerated space. Please see the attachment for the solution. This solution provides assistance in the rate of heat removal problem.

  • Calculating Rate of Heat Removal

    34455 Calculating Rate of Heat Removal using the Carnot Heat Engine A Carnot heat engine receives heat from a reservoir at 1700 degrees Farenheit at a rate of 700 Btu/min and rejects the waste heat to the ambient air at 80 degrees Farenheit.

  • Electromagnetism Induction of a Metal Bar

    Rate of conversion of electrical energy conversion to heat energy, Ph = i^2*R =>Ph = m^2*g^2*R*sin^2(phi)/(B^2*L^2) --Answer e.)

  • Wave, Heat and Light in Statistical Mechanics Approach

    54805 Waves, Heat and Light 1. A device called a wave demonstrator consists of rods [moment of inertia of each is I (kg m^2) and springs [tortional constant of each is T (N m)] connected with a spacing delta X as shown in the diagram below.

  • Osmotic Pressure and Endothermic Processes

    This solution explains: 1) How removal of a product will affect an equilibrium reaction. 2) How to write a chemical reaction of an endothermic process.

  • Random Walk and 1-Dimensional Heat Equation and its Fundamental Solution

    Observe that we divided by (instead of ), because the spacing between the possible values of is , since n-m must be even. Please see the attached file for the complete solution. Thanks for using BrainMass.

  • Thermodynamics - Carnot cycle problem

    After finding COP, required power can be found by; where QR is the heat removal rate which is 25 Kj/s. The expert examines thermodynamics Carnot cycle.

  • What Favors the Reverse Reaction?

    Some of the gaseous phase will convert to the liquid phase releasing heat in the process. 167 words to explain which of the following favour reverse reactions: total volume increase, boiling water addition, water vapour removal and the system being cooled

  • What speed to produce a current?

    The rails and the rod have zero resistance, but the rails are connected by a 12.6  resistor, and the entire system is in a uniform magnetic field of magnitude 0.93 T.

View More Related Solutions