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
By chromatography it's the answer
Many
elements in the Star Wars Movie film appear to defy the simple laws of physics.<span>
For instance the falling of spaceships when they were hit by a laser beam.
Experts said, this is one good example because without gravity in space, ships
should travel in the direction of the impact instead of dropping like a stone.</span>
Answer:
Because the Sun shines by nuclear fusion, which converts mass into energy as hydrogen turns into helium. ... A typical star that is the source of light and heat for the planets in the solar system.
Explanation:
87.69 grams of calcium metal is required to react with 7.75 g water to produce calcium hydroxide and hydrogen gas.
Ca (OH)2+2H2 = CaH2 + 2H2O
Convert grams of hydrogen to moles of hydrogen.
H2 has a molar mass of 2.016 g/mol.
1 mol H2 x 8.400g H2
2.016g H2 equals 4.1667 mol H2
Calculate the moles of CaH2 using the molar ratio.
The molar ratio is 1 mol CaH2: 2 mol H2, according to the equation that is balanced.
2.0833 mol CaH2 = 4.1667 mol H2 1 mol CaH2 2 mol H2
grams of CaH2 to CaH2
CaH2 has a molar mass of 42.09 g/mol.
1.mol CaH2=87.69 g CaH2 2.0833mol CaH2=42.09 g CaH2
87.69 g CaH2 are required for the reaction.
Learn more about moles here-
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