Which of the following statements is Give the meaning of the ff: 1. Amplitude. 2. Frequency. 3. Hertz 4. Wave. 5. Speed

Theof a wave is the number of wavelengthsthat pass by a point each second.a. frequencyb. amplitudec. crestd. trougha. longitudinal wavesb. seismic wavesc. surface wavesd. transverse waveslabel the missing part. write the letter.a. wavelength d. compressionb. rarefactione. crestc. troughf. amplitude​

What h is the closest asteroid to the earth

(thermal expansion)if the formula of δl is δl=αliδtthen what is the formula for α? (coefficient of linear expansion)​