Answer:
f=156Hz
F=467.25N
wavelength =1.6m
Explanation:
we have two frequencies from the question 624hz and 780hz.
let them be f1 and f2
f1=624=nv/2L
f2=780=(n+1)v/2L
624n+624=780n
n=4
velocity=2f1l/4
v=624*0.8/2
V=249.6m/s
The fundamental frequency of a wave is the following
f=v/2L
f=249.6/1.6
f=156hz
v=
T=v^2u
=249.6^2*7.5*10^-3
T=467.25N
f=156Hz
T=467.25N
T=tension in the string
wavelength is
v=f w
w=249.6/156
w=1.6m
Answer:
Actually, Polaris, also named alpha Ursa Minoris, is the brightest star in the Little Dipper. It marks the end of the handle. By a twist of luck, it also happens to reside very close to the North Celestial Pole (NCP). This is the point in the sky that all the stars in the north rotate around. It’s not exactly on the NCP, in fact it’s more than a Moons width away, so it scribes out a very small circle in long exposure star trail images like this one below. To the unaided eye it appears that all the stars rotate around Polaris while it remains fixed in one spot. During the last half of the 20th century Polaris’ variations had dropped to approximately 2%. No other Cepheid is known to have gone through this. Astronomers believed they were witnessing the evolution of the star before their very eyes, and that eventually we would see Polaris’ variations snuff out entirely.
Explanation:
Answer:
Explanation:
A car of mass 1000kg pushes 2000kg
The forward force is 4500N
Then, summation of the forward forces is ma
ΣF = Σ(ma) = m1a1 + m2a2
Since the body are moving together then, they will have the same acceleration(a)
ΣF = Σ(ma) = (m1+m2)a
Let m1=1000kg.
m2=2000kg
F=4500N
Then,
4500=(1000+2000)a
4500=3000a
Then,
a=4500/3000
a=1.5m/s²