Answer:
option (1)
Explanation:
fundamental frequency of open pipe, fopen = v/2L
fundamental frequency of closed pipe, f closed = v / 4L
By dividing both of them
f open = 2 x f closed
f open = two times f closed
f closed = 1 / 2 x f open
Answer:
The answer to your question is: D) Ф₂ = 49.71°
Explanation:
Data
n₁ = 1.33
Ф₁ = 35°C
n₂ = 1
Ф₂ = sin⁻¹ (n₁ sinФ₁/n₂)
Process
Substitution
Ф₂ = sin⁻¹ (n₁ sinФ₁/n₂)
Ф₂ = sin⁻¹ (1.33 sin 35/1)
Ф₂ = sin⁻¹ (1.33 x 0.574/ 1)
Ф₂ = sin⁻¹ ( 0.7628 / 1)
Ф₂ = sin⁻¹ (0.7628)
Ф₂ = 49.71°
Answer:
The gravitational force between the sun and the earth drops to (1/16) of its original value.
Explanation:
According to the gravitational law, gravitational force between two bodies is directly proportional the product of the masses of the two bodies and inversely proportional to the square of their distances apart.
If the two masses and the other constants of proportionality are held constant, the gravitational force between two bodies is inversely proportional to the square of their distances apart.
F ∝(1/R²)
If the initial gravitational force between the sun and the earth is given by F₀ and the distance between the sun and the earth is R₀.
F₀ = (k/R₀²)
where k is constant regardless of the values of corresponding gravitational forces and distances apart.
Then, let the new distance apart be R₁,
R₁ = 4 R₀
The new gravitational force between the sun and the earth, F₁ will be given by
F₁ = k/(R₁²)
Recall, R₁ = 4 R₀
F₁ = k/(4R₀)² = k/16(R₀²) = F₀/16
Hence, the gravitational force between the sun and the earth drops to (1/16) of its original value.
Answer:
Explanation:
30 rev/min (2π rad/rev) / (60 s/min) = π rad/s
α = Δω/t = (0 - π)/3 = π/3 rad/s²
θ = ½αt² = ½(π/3)3² = 1.5π radians
θ = 1.5π rad/2π rad/rev = 0.75 rev
Nuclear fusion and gravitational contraction
<span>constituent of star is hydrogen(including isotope) or helium. nuclear fission is almost impossible. D(deuterium; isotope of hydrogen) and T(tritium; also isotope of hydrogen) reacts and helium is formed. During this reaction, severe energy is generated. Heavier elements are formed and pulls each other. Gathered elements forms core of star. Gravity of the core prevents the gas to run away.</span>
