Frequency, υ = 2 Hz
Wavelength, λ = 6 m
We know that speed of a wave, v = υ × λ
⇒ v = 2 × 6 = 12 ms⁻¹
I believe the answer is the first one.
When collecting a gas over water, the gas is always a mixture of the gas collected and water vapor. This statement is True
Water vapour or aqueous vapour is the name for the gaseous state of water. It is a particular kind of water condition inside the hydrosphere. Both the boiling and evaporation of liquid water as well as the sublimation of ice can produce water vapour. Water vapour is transparent, like the bulk of other atmospheric constituents. An example of water vapour is the mist that floats over a pot of boiling water.
<h3>What is Water vapor ?</h3>
The gaseous phase of water is known as water vapour, water vapour, or aqueous vapour. Within the hydrosphere, it is one type of water state. Water vapour can be created by the boiling or evaporation of liquid water as well as by the sublimation of ice. Like the majority of other atmospheric elements, water vapour is transparent.
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The answer to your question is 12 degrees because you subtract 42 degrees minus 30 degrees to get 12 degrees
