WEEK 10 - QUIZ 1 FOR SMJP3103

The electromagnetic spectrum includes the following EXCEPT

• Blackbody

• X-rays

• Gamma Rays

• Radio Waves

Answer explanation

Gamma rays, x-rays, ultraviolet, visible light, infarered, thermal radiation, microwaves and radio waves.

What is the value of Stephan Boltzman constant?

• 5.67 x 10^-8

• 4.56 x 10^-9

• 6.45 x 10^-7

• 7.21 x 10^-6

Different bodies emit the same amount of radiation per unit surface area when they are at the same temperature

• TRUE

• FALSE

A blackbody is defined as a perfect ____ and absorber of radiation.

Radiation differs the other ​ (a)   heat transfer mechanisms, in that it ​ (b)   require the presence of material​ (c)   to take place.

• two
• does not
• medium

The emitted radiation is a ​ (a)   of ​ (b)   . At any specified temperature, it ​ (c)   with wavelength, reaches a ​ (d)   , and then ​ (e)   with increasing wavelength.

• continuous function
• wavelength
• increases
• peak
• decrease

What are the three modes of Heat Transfer ?

• Electromagnetic

• Convection current

• Conduction

• Radiation

• Convection

Find the derivative of the given equation f(x) = x³ + x² + 3

• 3x + 2x 

• x³ + x²

• 3x² + 2x

• 3x + 2x + 3

A room with an ambient temperature of 20\degree C20°C have TWO containers that are shiny metal and dull black. They were filled with warm water with the temperature of 65\degree C65°C .The container that would have the WARMEST water after TEN minutes is the _____ container

SELECT THE CORRECT ANSWERS TO BE FILLED IN THE BLANKS.

As shown in the diagram, take a plate with surface area A. With the thickness of __(a)__, Heat, Q is passing through the direction of __(b)__ axis. The rate of heat conduction per surface area is known as __(c)__ with the unit of \frac{W}{m^2}m2W​  

As the heat passed through the system at temperature T1, the temperature exiting the wall should be __(d)__ (higher/lower?) which is T2. Therefore, The rate of heat conduction through a plane layer is proportional to the __(e)__ across the layer and the __(f)__ but is inversely proportional to the __(g)__ of the layer.

• (a) dx, (b) x, (c) heat flux, (d) higher, (e) temperature difference, (f) surface area, (g) thickness

• (a) dx, (b) x, (c) heat flux, (d) lower, (e) temperature difference, (f) surface area, (g) thickness

• (a) A, (b) x, (c) heat rate, (d) lower, (e) thickness, (f) surface area, (g) temperature difference

• (a) dx, (b) y, (c) heat flux, (d) lower, (e) temperature difference, (f) surface area, (g) thermal conductivity