An aluminum cube 5 cm on a side is initially at a uniform temperature of 100C and is suddenly exposed to room air at 25C The convection heat transfer coefficient is 20 W m2 C Calculate the time required for the geometric center temperature to reach 50C

Question: An aluminum cube 5 cm on a side is initially at a uniform temperature of 100C and is suddenly exposed to room air at 25C.

An aluminum cube 5 cm on a side is initially at a uniform temperature of 100ºC and is suddenly exposed to room air at 25ºC. The convection heat-transfer coefficient is 20 W/m2 · ºC. Calculate the time required for the geometric center temperature to reach 50ºC.

Step by Step Solution

★★★★★

3.31 Rating (157 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock

L 0025 T i 100C T 25C h 20 ... View full answer

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Document Format (1 attachment)

892-P-T-H-T (910).docx

120 KBs Word File

Students Have Also Explored These Related Thermodynamics Questions!

What is the volume increase of an aluminum cube 5.00 cm on an edge when heated from 10.0oC to 60.0oC?

An aluminum sphere, 5.0 cm in diameter, is initially at a uniform temperature of 50C. It is suddenly exposed to an outer-space radiation environment at 0 K (no convection). Assuming the surface of...

An ordinary egg can be approximated as a 5.5-cmdiameter sphere. The egg is initially at a uniform temperature of 8°C and is dropped into boiling water at 97°C. Taking the properties of egg to...

Problem 2 A wooden cube, with a side dimension of 2 0 cm , is initially at a uniform temperature of 1 0 0 C . It is suddenly exposed to room air at 2 5 C on all its sides. The convection heat -...

Because of symmetry, the temperature gradient T/x at the centerline of an infinite plate will be zero when both sides are subjected to the same boundary condition in a cooling process. This may be...

For each of the following cases, determine an appropriate characteristic length L c and the corresponding Biot number Bi that is associated with the transient thermal response of the solid object....

The experimental result differs from the assumption. The result shows that the ring oscillator frequencies can be grouped into two groups, where the first group is the high frequency group for the...

GIVE DETAILED ANSWERS AND EXPLANATION 1. A rigid tank contains a hot fluid that is cooled while being stirred by a paddle wheel. Initially, the internal energy of the fluid is 800 kJ. During the...

= 1. A plane wall has a thickness 2L = 2 cm. The thermal conductivity of the wall is k 10 W/m. K, and the thermal diffusivity is a = 1 10-m/s. Initially, the wall is at a uniform temperature T =...

A flue passing hot exhaust gases has a square cross section, $300 \mathrm{~mm}$ to a side. The walls are constructed of refractory brick $150 \mathrm{~mm}$ thick with a thermal conductivity of...

It was reported that Exabyte Corporation, a fast growing Colorado marketer of backup tape drives, has decided to purchase key components of its product from others. For example, Sony Corporation of...

2.2. Write a class called Ticket that has the following: A field cost for the price of the ticket and a string field time for the start time of the event (assume times are in 24-hour format, like...

the company __ account is debited when it returns merchandise to a vendor on credit. inventory, cash payments, accounts payable, or account receivable

11. You are working on a project that was proceeding well until a manufacturing glitch occurred that requires corrective action. It turns out the glitch was an unintentional enhancement to the...

Find the work for Problem 3.106. Refrigerant-12 in a piston/cylinder arrangement is initially at 50C, x = 1. It is then expanded in a process so that P = Cv1 to a pressure of 100 kPa. Find the final...

A piston/cylinder contains water at 500C, 3 MPa. It is cooled in a polytropic process to 200C, 1 MPa. Find the polytropic exponent and the specific work in the process.

Consider a two-part process with an expansion from 0.1 to 0.2 m3 at a constant pressure of 150 kPa followed by an expansion from 0.2 to 0.4 m3 with a linearly rising pressure from 150 kPa ending at...

Dada la siguiente informacin, calcule el WACC para Stigum Inc. Suponga que la empresa tiene una tasa impositiva del 35%. Deuda : 220.000 bonos en circulacin con una tasa de cupn del 3,5%. Valor...

I have this group project do. I am responsible for the purchase excel worksheet. I am not sure where to begin with this excel worksheet. The assignment is listed below. Your pastor has learned that...

Forward Premium on the Dollar. Calculate the forward premium on the dollar if the spot rate is $1.6011=1.00 and the 3month forward rate is $1.5633=1.00. Note: Use a 360-day year. The forward premium...