Chapter 11: 11-36P (page 292)
A sound wave in air has a frequency of 282 Hz and travels with a speed of 343 m/s. How far apart are the wave crests (compressions)?
Short Answer
The wave crests (compressions) are \(1.22\;\;{\rm{m}}\)apart.
Chapter 11: 11-36P (page 292)
A sound wave in air has a frequency of 282 Hz and travels with a speed of 343 m/s. How far apart are the wave crests (compressions)?
The wave crests (compressions) are \(1.22\;\;{\rm{m}}\)apart.
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Get started for freeTwo children are sending signals along a cord of total mass 0.50 kg tied between tin cans with a tension of 35 N. It takes the vibrations in the string 0.55 s to go from one child to the other. How far apart are the children?
The age of the universe is thought to be about 14 billion years. Assuming two significant figures, write this in powers of 10 in (a) years, (b) seconds.
How many significant figures does 1.3262 + 25.2 have?
(a) 2
(b) 3
(c) 4
(d) 5
Write out the following numbers in full with the correct number of zeros: (a)\({\bf{8}}{\bf{.69 \times 1}}{{\bf{0}}^{\bf{4}}}\), (b)\({\bf{9}}{\bf{.1 \times 1}}{{\bf{0}}^{\bf{3}}}\), (c)\({\bf{8}}{\bf{.8 \times 1}}{{\bf{0}}^{{\bf{ - 1}}}}\), (d)\({\bf{4}}{\bf{.76 \times 1}}{{\bf{0}}^{\bf{2}}}\), and (e)\({\bf{3}}{\bf{.62 \times 1}}{{\bf{0}}^{{\bf{ - 5}}}}\).
Multiply \({\bf{3}}{\bf{.079 \times 1}}{{\bf{0}}^{\bf{2}}}{\bf{ m}}\) by \({\bf{0}}{\bf{.068 \times 1}}{{\bf{0}}^{{\bf{ - 1}}}}{\bf{ m}}\),taking into account significant figures.
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