Chemistry, 21.08.2019 20:40 groverparham3
If an unknown mineral has a hardness between 5 and 9, what could you do to the mineral to find out more about its hardness?
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Two friends at different locations want to communicate with each other by sending low energy signals. which of the following methods can they use to communicate? a) produce x-rays using colliding electrons and send them to radios, which capture sound b) send messages using infrared radiation, which travel in the form of waves c) send radio waves through intervening media like radio and television d) produce sound waves using microwaves from heated objects
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Which characteristics can be used to differentiate star systems? check all that apply.
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What is the wavelength of a wave with a velocity of 50 m/s and a frequency of 5hz a 250 m b 0.1 m c 10m d 0.01 m
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If an unknown mineral has a hardness between 5 and 9, what could you do to the mineral to find out m...
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