Please select a subject first
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Name the tissue present in the brain.
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A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff?
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Give two practical applications of reflection of sound waves.
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Explain how bats use ultrasound to catch a prey.
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How is ultrasound used for cleaning?
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Explain the working and application of a sonar.
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A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
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Explain how defects in a metal block can be detected using ultrasound.
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How are fish obtained?
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What are the advantages of composite fish culture?
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How do you differentiate between capture fishing, mariculture and aquaculture?
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Earth moves around the sun with uniform velocity.
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Draw a labelled diagram of a neuron.
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Mention four advantages of fishery.
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What are the advantages of composite fish culture?
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How do you differentiate between capture fisheries, inland fisheries and aquaculture?
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Define the following term:
Cytosol
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List one function of the following : 4.neuron
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State two characteristics of nerve cells.
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