Physics, 01.09.2019 20:30, cravingnafi202
When a 440-hz tuning fork and a piano key are struck together, five beats are heard. if the pitch of the note on the piano is higher than the tuning fork, what is the frequency of the note?
440 hz
445 hz
435 hz
435 or 445 hz
Answers: 2
Physics, 21.06.2019 23:30, hardwick744
Which lists the main components of darwin’s theory of evolution? a. random mutations drive evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms do not change. b. natural selection drives evolution; the evolution of a population happens slowly; organisms have common ancestors; organisms change over time. c. natural selection drives evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms change over time. d. random mutations drive evolution; the evolution of a population happens rapidly; organisms have common ancestors; organisms do not change.
Answers: 1
Physics, 22.06.2019 15:30, tiffuuu
At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.
Answers: 1
Physics, 23.06.2019 00:00, isabella4141
Which is an advantage of subdividing science into different areas?
Answers: 3
When a 440-hz tuning fork and a piano key are struck together, five beats are heard. if the pitch of...
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