Answer:
v = 72.54 m/s
Explanation:
We have,
Length of a guitar string is 0.62 m
Frequency of a guitar string is 234 Hz
For guitar string,
The velocity of the wave in the string is given by :
So, the velocity of the waves in the string is 72.54 m/s.
A thin, square metal plate measures 14 cm on each side and has emissivity of 0.60. The plate is heated to a temperature of 745°C
1 answer:
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Answer:
u =0.269
Explanation:
To find the coefficient of friction we know the following formula
Where
= Force of Friction
= Coefficient of Friction
= Normal Force
Thus we first find the Normal force (N). Remember that the Normal force is perpendicular to the surface, and is equal to the opposing component of Weight (W). Since the surface here is horizontal, then the Normal force will be equal to the Weight.
Now we find the Force on the spring that caused the extension of 3.25cm or 0.0325m
Where
= Force of Friction
= Force Constant
= extension
Hence
Now to find the coefficient of friction we use the first formula