Answer:
f λ = c = 3.00E8 frequency * wavelength = speed of light
λ = c / f = 3.00E8 / 4.0E14 = 7.5E-7 m
Note 1 angstrom = 1.00E-10 m and 1 milli-micron = 1.00E-9 m
So the wavelength would be 7500 angstroms
The visible spectrum is 4000 A - 7000 A or 400 - 700 milli-microns
Answer:
Explanation:
1 ) the volume of helium in the balloon when fully inflated
= 4/3 π R³
= 4/3 x 3.14 x 5.3³
= 623.3 m³
2 ) force of gravity on the entire system ,but with no people
= (mass of the empty balloon and basket + mass of helium )x g
=( 129 + 623.3 x.18 )x 9.8
= 2363.7 N
3 ) magnitude of the buoyant force on the entire system (but with no people )
( Volume of empty balloon + basket + volume of helium ) density of air x g
( 0.057 + 623.3 ) x 1.23 x 9.8
= 7513.94 N
4 ) magnitude of the force of gravity on each person
Mass of each person x g
= 71 x 9.8
= 695.8 N
<em>Magnetite is a Natural magnet</em>
Everything in the universe that is not a star reflects light from Stars. Otherwise you can't see it.
Answer:
A
Explanation:
Name me brainliest plzzzzz
