1. On 11 February 2016 The LIGO Scientific Collaboration announced the detection of ____________
A. electromagnetic wavesB. seismic waves
C. gravitational waves
D. radio waves2. The SI unit of charge is __________.
B. Coulomb
C. OhmD. Volt
3. Very High Frequency (VHF) have __________ wavelengths.
A. shorter
B. shortestC. longer
D. longest
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