Everything Science Grade 12
CHAPTER 8. WORK, ENERGY AND POWER 8.4 However, power is defined as the rate at which work is done. Therefore, P = ΔW Δt . This c ...
8.4 CHAPTER 8. WORK, ENERGY AND POWER W F Step 3 : Determine how to approach the problem From the force diagram,we see that the ...
CHAPTER 8. WORK, ENERGY AND POWER 8.4 the forklift exert in holding the crate in place? SOLUTION Step 1 : Determine what is give ...
8.4 CHAPTER 8. WORK, ENERGY AND POWER watch. Note: the human body is not very efficient in these activities, so your actual powe ...
CHAPTER 8. WORK, ENERGY AND POWER 8.4 Chapter 8 — Summary See the summary presentation ( Presentation: VPqtf at http://www.every ...
8.4 CHAPTER 8. WORK, ENERGY AND POWER 0 1 2 3 4 − 1 − 2 − 3 − 4 1 2 3 4 5 6 7 8 � � � � Abdul Beth Charles How much work does a ...
CHAPTER 8. WORK, ENERGY AND POWER 8.4 h a mgh c mgh sin θ b mgh sin θ d^12 mv^2 [IEB 2003/11 HG1]In which of the following situ ...
Doppler Effect 9 10.1 Introduction ESCEH Have you noticed howthe pitch of a police car siren changes as the car passes by or how ...
CHAPTER 9. DOPPLEREFFECT 9.2 Figure 9.1: Stationary sound source away from the source atthe same rate in all directions. The dis ...
9.2 CHAPTER 9. DOPPLEREFFECT on the right of the source is constant. The distance between peaks onthe left is also constant but ...
CHAPTER 9. DOPPLEREFFECT 9.2 Example 1: The Doppler Effect forSound 1 QUESTION The siren of an ambulance has a frequency of 700 ...
9.2 CHAPTER 9. DOPPLEREFFECT Example 2: The Doppler Effect forSound 2 QUESTION What is the frequency heard by a person drivingat ...
CHAPTER 9. DOPPLEREFFECT 9.2 Ultrasound and the Doppler Effect ESCEJ Ultrasonic waves (ultrasound) are sound waves with a freque ...
9.3 CHAPTER 9. DOPPLEREFFECT A small plane is taxiing directly away from you down a runway. The noise of the engine, as the pil ...
CHAPTER 9. DOPPLEREFFECT 9.3 The Expanding Universe ESCEL Stars emit light, which is why we can see themat night. Galaxies are h ...
9.3 CHAPTER 9. DOPPLEREFFECT The Doppler Effect canbe observed in all typesof waves, including ultrasound, light and radiowaves ...
Colour 10 10.1 Introduction ESCEM The light that human beings can see is called visible light. Visible light is actually just a ...
10.2 CHAPTER 10. COLOUR Colour Wavelength range (nm) Frequency range (Hz) violet 390 - 455 769 - 659× 1012 blue 455 - 492 659 - ...
CHAPTER 10. COLOUR 10.2 f = c λ = 3 × 108 520 × 10 −^9 = 577× 1012 Hz The frequency of the green light is 577 × 1012 Hz Example ...
10.2 CHAPTER 10. COLOUR wavelength λ. λ = c f = 3 × 108 490 × 1012 = 6. 122 × 10 −7 m = 612× 10 −^9 m = 612 nm Therefore the ora ...
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