Chapter 5 LIMESTONES

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cours - matière : chemistry

Chapter 5 LIMESTONES 1. INTRODUCTION 1.1 Something like about one-fifth of all sedimentary rocks are carbonate rocks. The two main kinds of carbonate rocks, limestones and dolostones, together with sandstones and shales, are what might be called the “big four” of sedimentary rock types. I'm reluctant to try to guess what percentage of all sedimentary rocks those “big four” account for, but the figure must be in the upper nineties.

mass action quotient
caco3
mgco3 content
crystals with a lesser degree
deep ocean bottom
deep ocean
carbonate rocks
state of saturation
calcite
oceans

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PhysicsWaves Worksheet Solutions 1. The diagram on the right shows a wave at a particular moment in time as it trav-els along a rope in the direction shown. Which one of the following statements is true about the point P on the rope? (a) Itis moving upwards. (b) Itis moving downwards. (c) Itis moving to the right. (d) Itis momentarily at rest. Answer (a) Although it is at equilibrium position it moving upwards at maximum speed 2. A standing wave is generated on a string which is ﬁxed at both ends, and vibrates at its fundamental frequency.The tension of the string is now increased and a new standing wave vibrating at its fundamental frequency is generated.Which one of the following statements about the change in the properties of the wave is correct (a) Thewave speed increases and the wavelength increases. (b) Thewave speed increases and the frequency increases. (c) Thewave speed decreases and the wavelength decreases. (d) Thewave speed decreases and the frequency decreases. Answer (b).Increasing tension increases the speed.Since the fundamental frequency is proportional to the speed then the fundamental frequency will also increase.The wavelength will be twice the length of the string and this has not changed. 3. Awave of frequency 5.0 Hz travels along a string with a speed of 20 m/s.The phase diﬀerence between the oscillations of the string separated by 1.0 m along the wave is (a)π/4 (b)π/2 (c)π(d) 2π Answer (b).The wavelength is 20/1 m separation is one quarter of a wavelength5 = 4 m. 0 which is 90orπ/2 out of phase. 4. Twostrings, one thick and the other thin, are connected to form one long string.A wave travels along the string and passes the point where the two strings are connected.Which of the following does not change at that point: (a) frequency (b) propagationspeed (c) amplitude (d) wavelength Answer (a).Frequency depends only on the source.The speed changes in a new medium and as a result all other variables will change.

In a standing wave

The wave pulses below travel along a string at 1 cm/s.Draw pictures of the string at a

Two periodic sinusoidal wavesf(x) =Asin (κx−ωt) andg(x) =Asin (κx+ωt) travel in

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