Physics, 29.01.2021 20:30 vonyeaparker6064
The speed of sound in air is around 330 m/s. If a bat emits a single high-pitched ‘click’ of sound in a cave that is 20m wide, calculate the time taken for the echo of the sound to return to the bat.
Dolphins use seawater to transmit their high-frequency ‘clicks’. If a dolphin is 20 m away from an underwater object, deduce whether it will see the object sooner or later than the bat.
Suggest how an ultrasound scan can produce an image of an object within the human body.
Answers: 1
Physics, 22.06.2019 01:30, admiralaj85
What is the magnitude of the resultant vector round your answer to the nearest tenth
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Physics, 22.06.2019 18:30, kalithekittenqueen
Aprotein molecule in an electrophoresis gel has a negative charge. the exact charge depends on the ph of the solution, but 30 excess electrons is typical. what is the magnitude of the electric force on a protein with this charge in a 1600n/c electric field? write in two significant numbers, and also in newton
Answers: 2
Physics, 22.06.2019 21:00, liddopiink1
Earth's atmosphere is composed of mostly two gases. name the two gases that make up the majority of the atmosphere and use the pie chart to tell the percentages of each.
Answers: 2
The speed of sound in air is around 330 m/s. If a bat emits a single high-pitched ‘click’ of sound i...
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