What is the speed of a wave that has a wavelength of 2 m and a
frequency of 1.5 Hz?

3m/s

Explanation:

Given that:

Wavelength (λ)= 2m

Frequency F = 1.5Hz

Speed of wave = ?

The wavelength is the distance covered by the wave in one second. It is measured in metre per second, and represented by the symbol V

So, apply V = F λ

V = 1.5Hz x 2m

V = 3 m/s

Thus, the speed of the wave is 3m/s

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the enthalpy of formation of water is given as -285.8kj/mol, which states that the enthalpy of formation is negative.

negative enthalpy of formation indicates that the heat is released during the reaction process. the heat is released from reaction to the surroundings the enthalpy is expressed with a negative sign with the energy given out in the reaction process.

the formation of water takes place by giving out heat which is -285.8 kj/mol.