Answer:
Content
Explanation:
The type of validity that is established by demonstrating a correlation between scores on a test and later academic performance is known as CONTENT VALIDITY
The above statement is true because Content validity is a form of validity testing used to assess whether the outcome of a test is a precise measure of the fundamental aspect or domain of the construct.
Hence, to provide a credible result, content validity ensures it covers all suitable parts of the content or topic it attempts to measure.
I would assume thermal energy, since it's concerning heat and all. Although judging off of the fact that this is for physics, I don't think that would be the right answer in this case.
Answer:
v= 35.09m/s
f= 38.77Hz
Explanation:
Length 'L' = 1.81 m
Now, First off the fourth harmonic of a string with two nodes is given by:
L=2λ
1.81=2λ
λ= 1.81/2 =>0.905 m
Wave speed on a strecthed string is:
v=√(Ft/(m/l))
v= √(8.37)/(0.0123/1.81)
v= 35.09m/s
Next is to determine frequency i,e
v=λf or f =v/λ
f= 35.09/0.905
f= 38.77Hz
