Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Consider a cold aluminium canned drink that is initially at a uniform temperature of 3°C. The can is 12.5 cm high and has a diameter of 6 cm. The combined convection/radiation heat transfer coefficient between the can and the surrounding air at 25°C is 10 W/m2·°C. In an effort to slow down the warming of the cold drink, a person puts the can in a perfectly fitting 1-cm-thick cylindrical rubber insulator (k = 0.13 W/m ·°C). How long will it take approximately for the temperature of the drink to rise from 3 °C to 10 °C? (Also see the figure attached)
Key Assumptions:
1 - Assume the top of the can is not covered
2 - For the drink, you can use the properties of water at room temperature, ? = 1000 kg/m3 and Cp = 4180 J/kg.°C.
3 - This is transient heat conduction, and the rate of heat transfer will decrease as the drink warms up and the temperature difference between the drink and the surroundings decreases. However, you can solve this problem approximately by assuming a constant average temperature of (3+10)/2 = 6.5°C for the drink during the process.
A) About 32 min
B) About 43 min
C) About 56 min
D) About 22 min
Please provide an explanation for your answer
1. Natural gas and 100% excess air enter the combustion chamber of the Capstone micro-gas turbine at 400 kPa and 452 °C.
water at 400kpa with a quality of 25 has its temperature raised 20c in a constant-pressure process. what is the new
a thin-walled cylindrical pressure vessel of 250 mm internal diameter and 5 mm thickness is subjected to an internal
determine the work done in lifting a 250-lb refrigerator 4 ft vertically into a van. alternatively the refrigerator
a water cannon for rock tunneling operates by using compressed gas for accelerating a 65-kg high-strength titanium
a 1 cm-wide 2 cm-long semiconductor device dissipates 5w and is mounted on a 2 cm-square 2mm-thick aluminum plate via a
a centrifugal pump has d1 6 inches d2 14 inches b1 5 inches b2 4 inches beta1 20 degrees beta2 45 degress and rotates
air in a piston-cylinder assembly initially at 290 k and 100 kpa undergoes two internally reversible processes in
What is the resolution error (or quantization error) if a +/- 10V DAQ card has a 3 bits? If a 10 Hz signal is sampled at 45 Hz. For an input frequency of 10 Hz, If you want at least 20 points/second, what should your sampling frequency be? If you wan..
What would be the formula for converting degrees Fahrenheit to degrees Celsius? what temperature would be the equal number of degrees in both Fahrenheit and Celsius scales?
consider an acrylic sheet of thickness l 5 mm that is used to coat a hot isothermal metal substrate at th 300 c. the
why does necking occur during a tensile test? use your knowledge of engineering stress and strain to explain the
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd