Answer:
75.5g
Explanation:
From the ionic equation, we can write
next we find the number of charge
Note Q=it
for i=8.5A, t=3.75 to secs 3.75*60*60=13500secs
hence
Since one faraday represent one mole of electron which equal 96500C
Hence the number of mole produced by 114750C is
114750/96500=1.2mol
The mass of copper produced is
Hence the amount of copper produced is 75.5g
Let's assume these microwaves are traveling in a vacuum, then this equation holds true:
c = fλ
c is the speed of light in a vacuum, f is the frequency, and λ is the wavelength.
Given values:
c = 3×10⁸m/s
λ = 20×10⁻³m
Plug in the values and solve for f:
3×10⁸ = f(20×10⁻³)
f = 15GHz
Choice A
Answer:
See explaination.
Explanation:
L = 80 cm
= 0.8 m
V = 343 m/s ( sound speed in air )
V1 = n V / 2 L
= 1 X 343 / 2 X 0.8
= 1 X 343 / 2 X 0.8
V1 = 214.375 Hz
Coudé telescopes use a convex secondary mirror like a Cassegrain and an angled mirror like a Newtonian reflector to move the light rays to a focal point away from the telescope. This arrangement is useful when optical equipment is being used that is too heavy to mount directly on the telescope.
