1. Vpa = 180m/s. @ 0 deg.
Vag = 40m/s @ 120 deg,CCW.
<span>
Vpg = Vpa + Vag,
Vpg = (180 + 40cos120) + i40sin120,
Vpg = 160 + i34.64,
Vpg=sqrt((160)^2 + (34.64)^2)=163.7m/s.
</span>
<span>2. tanA = Y / X = 34.64 / 160 = 0.2165,
A = 12.2 deg,CCW. = 12.2deg. North of
East. </span>
3. 1 hr = 3600s. <span>d = Vt = 163.7m/s * 3600s = 589,320m.
hope this helps</span>
Answer:
a) v₂ = 4.2 m/s
b) v₂ = 5 m/s
Explanation:
a)
We will use the law of conservation of momentum here:
where,
m₁ = m₂ = mass of bowling pin = 1.8 kg
u₁ = speed of first pin before collsion = 5 m/s
u₂ = speed of second pin before collsion = 0 m/s
v₁ = speed of first pin after collsion = 0.8 m/s
v₂ = speed of second after before collsion = ?
Therefore,
<u>v₂ = 4.2 m/s</u>
<u></u>
b)
We will use the law of conservation of momentum here:
where,
m₁ = m₂ = mass of bowling pin = 1.8 kg
u₁ = speed of first pin before collsion = 5 m/s
u₂ = speed of second pin before collsion = 0 m/s
v₁ = speed of first pin after collsion = 0 m/s
v₂ = speed of second after before collsion = ?
Therefore,
<u>v₂ = 5 m/s</u>
Energy cannot be created nor be destroyed
Energy = mass x speed of light squared
Answer:
Your question is not complete. this option completes your question
<em> Which of the following is not a formant wavelength? </em>
<em>A. 3λ/4.
</em>
<em>B.λ /4.</em>
<em>c. λ/2 </em>
<em>D. 7λ/4</em>
Explanation:
A formant wavelength will be such that the total length of pipe = nλ/2 + λ/4.
When the above condition is satisfied then only a node is formed at the closed end and antinode at the open end.
Among the given options:
(a) 7λ/4 = nλ/2 + λ/4, satisfied for n = 3
(b) 3λ/4 = nλ/2 + λ/4, satisfied for n = 1
(c) λ/2 λ/2 = nλ/2 + λ/4, not satisfied for any value of n, HENCE NOT A FORMANT WAVELENGTH (ANSWER)
(d) λ/4 = nλ/2 + λ/4, satisfied for n = 0
