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IB Physics SL B 2 1 Conservation of Energy Questions

Practise IB Physics SL B.2.1 by balancing incoming, reflected, absorbed and emitted radiation in planetary climate models.

Syllabus
First assessment 2025
Course
Physics SL
Level
SL

Exam points

  • State and apply Newton’s first law to identify inertial motion and the conditions for zero resultant force.
  • Use Newton’s second and third laws to relate resultant force, mass and acceleration and to identify equal-and-opposite interaction pairs from complete mark-scheme evidence.

IB Physics SL B 2 1 Conservation of Energy Questions question 1

[Maximum number: 1]

In an energy-balance climate model, the power of the incoming radiation over an area A is PiP_{\mathrm{i}} and the power of the outgoing radiation over the same area is PoP_{\mathrm{o}}. The surface heat capacity is CsC_{\mathrm{s}}. What is the time taken to increase the temperature of the area by θ\theta ?

A

(Pi−Po)Csθ\frac{\left(P_{\mathrm{i}}-P_{\mathrm{o}}\right)}{C_{\mathrm{s}} \theta}

B

Csθ(Pi−Po)\frac{C_{\mathrm{s}} \theta}{\left(P_{\mathrm{i}}-P_{\mathrm{o}}\right)}

C

ACsθ(Pi−Po)\frac{A C_{\mathrm{s}} \theta}{\left(P_{\mathrm{i}}-P_{\mathrm{o}}\right)}

D

A(Pi−Po)Csθ\frac{A\left(P_{\mathrm{i}}-P_{\mathrm{o}}\right)}{C_{\mathrm{s}} \theta}

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