i need help with homework questions please?

1 ⤊

i need help with homework questions please?

1. Which one of the following frequencies of a wave in the air can be heard as an audible sound by the human ear?
A. 0.10 Hz
B. 10 Hz
C. 1,000 Hz
D. 100,000 Hz
2. If two waves with equal amplitudes and wavelengths travel through a medium in such a way that a particular particle of the medium is at the crest of one wave and at the trough of the other wave at the same time, what will happen to that particle?
A. The particle will vibrate with double amplitude due to resonance
B. The particle will remain stationary due to interference
C. The particle will move halfway to the crest due to reinforcement
D. The particle will cause beats as a result of the wave combination

2007-02-11 02:33:37 · 3 answers · asked by tami c 1 in Science & Mathematics ➔ Physics

3 answers

1) C

2) B

2007-02-11 02:40:13 · answer #1 · answered by Mark H 3 · 1⤊ 0⤋

1 c
2 d

2007-02-11 02:50:01 · answer #2 · answered by Anonymous · 0⤊ 0⤋

1. B
2. C

2007-02-11 02:42:26 · answer #3 · answered by pulverizer 2 · 0⤊ 0⤋