(a) Frequency of sound wave is inversely proportional to string length.
(b) Pitch of a sound depends on the frequency while loudness depends on the amplitude of sound.
<h3>
Relationship between string length and frequency</h3>
The relationship between string length and frequency is given as;
λ = 2L
where;
- λ is wavelength
- L is length of the string
v = fλ
f = v/λ
f = v/2L
Thus, frequency of sound wave is inversely proportional to string length.
<h3>Relationship between pitch and loudness of sound</h3>
The pitch of a sound depends on the frequency while loudness of a sound depends on the amplitude of sound waves.
Learn more about pitch and loudness here: brainly.com/question/61859
<span>1.
</span><span>Efficiency is the
measure of how efficient a process is. It is used to assess the ability of a
process in avoiding waste energy, materials, money and time in doing a
desirable output. It is calculated as;
Efficiency = useful energy ouput / total energy input</span>
<span>.40 = useful work / 200</span>
<span>useful work = 80 joules</span>
Answer:
A. 70 Ns
B. 70 Kgm/s
C. 2.19 m/s
Explanation:
A. Determination of the impulse.
Force (F) = 20 N
Time (t) = 3.5 s
Impulse (I) =?
Impulse (I) = force (F) × time (t)
I = Ft
I = 20 × 3.5
I = 70 Ns
Thus, the Impulse is 70 Ns.
B. Determination of the change in momentum
Force (F) = 20 N
Time (t) = 3.5 s
Change in momentum =?
Change in momentum = m(v – u) = Ft
Change in momentum = Ft
Change in momentum = 20 × 3.5
Change in momentum = 70 Kgm/s
C. Determination of the final velocity.
Change in momentum = 70 Kgm/s
Initial velocity (u) = 0 m/s
Combined mass (m) = 32 kg
Final velocity (v) =?
Change in momentum = m(v – u)
70 = 32(v – 0)
70 = 32(v)
70 = 32v
Divide both side by 32
v = 70 / 32
v = 2.19 m/s
Thus, the final velocity is 2.19 m/s
