Answer:
69.6m
Explanation: Given that:
∆t = 0.19s
V.air = 347m/s
V.rod = 19×V.air
Also note that both sound covers the same distance both in two different medium.
Let us assume that x is the length of the rod, and the time it takes for sound in air to travel that distance is:
tₐ = x / 347
The time it takes for sound to travel through the rod is:
t = x / (19 × 347)
The difference between these is 0.19s:
tₐ - t = 0.19
x / 347 - x / (19 × 347) = 0.19
6593x-347x/2287771 = 0.19
6246x = 434676.49
x = 434676.49/6246
x = 69.59m
x = 69.6m
HEY THERE !!
It is called SUBLIMATION.
so the correct answer is (D).
Answer:
2.87m
Explanation:
Using the law of gravitation to solve this question
F = GMm/r²
G is the gravitational constant
M and m are the masses
r is the distance between the masses
Substitute the given values
G = 6.67×10^-11 m³/kgs²
M =8.8 x 10^6 kg
m = 5.6 x 10^5 kg
F =440N
400 = 6.67×10^-11×8.8 x 10^6 ×5.6 x 10^5/r²
400r² = 328.698×10
400r² = 3286.98
r² = 3286.98/400
r² = 8.21745
r = √8.21745
r = 2.87m
Hence the distance of separation is 2.87m
Answer:
366.6J
Explanation:
We only need to apply conservative linear momentum, making v the initial speed of pigeon, so
Solving for v,
<em>The energy lost we can calculate with </em>