When is an object in radiative balance?

When is an object in radiative balance?
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The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2 . The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10 -8 W/m2 .K4 )(A) 1000(B) 727(C) 800(D) 1200

Description : The thermal radiative flux from a surface of emissivity = 0.4 is 22.68 kW/m2 . The approximate surface temperature (K) is (Stefan-Boltzmann constant = 5.67 × 10 -8 W/m2 .K4 ) (A) 1000 (B) 727 (C) 800 (D) 1200

Last Answer : (A) 1000

A sphere of radius 'R1 ' is enclosed in a sphere of radius 'R2 '. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is (A) 0 (B) R2 /(R1+R2 ) (C) 1 (D) (R1 /R2 )

Description : A sphere of radius 'R1 ' is enclosed in a sphere of radius 'R2 '. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is (A) 0 (B) R2 /(R1+R2 ) (C) 1 (D) (R1 /R2 )

Last Answer : (B) R2 /(R1+R2 )

Recall homework 2 in which we calculated emissivity for a single layer atmosphere. If the atmosphere were to suddenly become a perfect emitter (i.e., if e = 1 rather than e = 0.8), what would happen to the surface temperature? (a) The surface temperature would be lower. (b) The surface temperature would be the same. (c) The surface temperature would be higher. (d) There would be initial warming followed by cooling as the planet moves toward radiative equilibrium.

Description : Recall homework 2 in which we calculated emissivity for a single layer atmosphere. If the atmosphere were to suddenly become a perfect emitter (i.e., if e = 1 rather than e = 0.8), ... . (d) There would be initial warming followed by cooling as the planet moves toward radiative equilibrium.

Last Answer : (c) The surface temperature would be higher.

The type of radiative scattering commonly associated with the atmosphere and the reason the sky is blue is called what?

Description : The type of radiative scattering commonly associated with the atmosphere and the reason the sky is blue is called what?  

Last Answer : ANSWER: RAYLEIGH SCATTERING

How do I balance any object?

Description : How do I balance any object?

Last Answer : A quick Google search reveals lots of links on this topic, including this video: http://www.5min.com/Video/How-to-Balance-Objects-72412660 Hope it helps.

[Curiosity, not homework] How do you compute the balance point for an asymmetrical hanging object?

Description : [Curiosity, not homework] How do you compute the balance point for an asymmetrical hanging object?

Last Answer : I'm a little rusty in Physics 1, but I think this works. When you calendar is suspended draw a virtual (or physical) line from the point of suspension (the clip) directly towards the ground ( ... in the desired position and attach the clip so that it is directly above the centre of gravity. Voila?

A spring balance A and a beam balance B are used to weigh an object at different points on Earth. It will be observed that (a) The readings of A and B will be different at different points of the Earth. (b) The readings of A will be the same but the readings of B will be different at different places. (c) Both A and B will have the same reading at all points on the Earth. (d) The readings of A will be different but those of B will be the same at different points on the Earth.

Description : A spring balance A and a beam balance B are used to weigh an object at different points on Earth. It will be observed that (a) The readings of A and B will be different at different points of the ... readings of A will be different but those of B will be the same at different points on the Earth.

Last Answer : Ans:(d)

What is the object of Postmaster ‘s Balance Sheet ? a. Reconciliation of Daily Cash Book b. Reconciliation of HO Summary c. Reconciliation between HO Cash Book and TCB

Description : What is the object of Postmaster ‘s Balance Sheet ? a. Reconciliation of Daily Cash Book b. Reconciliation of HO Summary c. Reconciliation between HO Cash Book and TCB

Last Answer : c. Reconciliation between HO Cash Book and TCB

A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2is (A) 8.82 (B) 9.81 (C) 10.88 (D) 0.95

Description : A 2 kg object weighs 1.8 kgf on a spring balance. The value of 'g' at that location in m/sec2is (A) 8.82 (B) 9.81 (C) 10.88 (D) 0.95

Last Answer : (A) 8.82

An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is (A) 10 m/sec² (B) 9.81 m/sec² (C) 9.75 m/sec² (D) 9 m/sec

Description : An object having 10 kg mass weighs 9.81 kg on a spring balance. The value of 'g' at this place is (A) 10 m/sec² (B) 9.81 m/sec² (C) 9.75 m/sec² (D) 9 m/sec

Last Answer : Answer: Option A