A box of mass 115 kg sits on an inclined surface with an angle of 59º. What
1 answer:
Answer:
966 N
Explanation:
The component of the weight along the direction perpendicular to the plane is:
where
m is the mass of the box, g the acceleration of gravity, the angle of the inclined plane.
Similarly, the component of the weight of the box along the surface is
acting down along the incline.
Here we have:
m = 115 kg
g = 9.8 m/s^2
Substitting in the last equation, we find the component of the weight of the box along the surface:
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Answer:
The decibel of the remaining pigs is 51.5 dB.
Explanation:
Decibel (dB) is a unit of measure of the intensity of a given sound.
Number of pigs = 199, noise level = 74.3 dB.
Given that the intensity (I) of the sound from the pen is proportional to the number of pigs (N), thus:
I N
I = kN
where k is the constant of proportionality.
⇒ k =
=
k = 0.3734
When 61 numbers of pigs were removed, the number of remaining pigs (N) squealing at their original level is 138.
Thus, the becibel level (I) of the remaining pigs can be determined by:
I = kN
= 0.3734 × 138
= 51.53 dB
The becibel level (I) of the remaining pigs is 51.53 dB.