If f=140hz
speed=?
wavelength=?
without all information given, it would be difficult to answer but the formula is speed=frequency ×wavelength
Answer:
4520 kJ
Explanation:
To make a substance transition phases an energy must be applied, this is know as the latent heat.
Water has a latent heat of 40.7 KJ/mol to turn into vapor.
The molecule of water has a molecular weight of 18. This means that a mol of water weights 18 grams.
With this we can convert the latent heat to use grams instead of mols
Now, the heat needed to vaporize water is simply:
Q = m * DHvap = 2000 g * 2.26 kJ/g = 4520 kJ
You are unable to lift an object.
The Weight makes the object difficult to lift.
<h3>How can we state the above statement?</h3>
To calculate weight, we know from the formula that,
W=mg
Here in the formula,
w= the weight of the object.
m= mass of the object.
g= the acceleration due to gravity.
Also this is defined as force which acting on a object due to gravity. This kind of force usually it acts downwards.
This type of force has to overcome for it to be lifted up by individuals which is why Weight makes the object difficult to lift.
Now from the above discussion we can easily state that, The Weight is the property that makes the object difficult to lift.
Learn more about Weight:
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