알맞은 단어로 빈칸 채우기 1)물체가 한 번의 진동을 완료하는 데 걸리는 시간을
2)소리의 크기는 진동의 에 의해 결정됩니다.
3)주파수 단위는 입니다.
4)원치 않는 소리는 라고 합니다.
5)소리의 날카로움은 진동에 의해 결정됩니다.
I know you can't understand but let me say in English

1)time taken by an object to complete one oscillation is called
2)loudness is determined by the of vibration
3)the unit of frequency is
4)unwanted sound is called
5)shrillness of a sound is determined by the vibration

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.