Answer:
1) f= 8.6 GHz
2) t= 0.2 ms
Explanation:
1)
- Since microwaves are electromagnetic waves, they move at the same speed as the light in vacuum, i.e. 3*10⁸ m/s.
- There exists a fixed relationship between the frequency (f) , the wavelength (λ) and the propagation speed in any wave, as follows:
- Replacing by the givens, and solving for f, we get:
⇒ f = 8.6 Ghz (with two significative figures)
2)
- Assuming that the microwaves travel at a constant speed in a straight line (behaving like rays) , we can apply the definition of average velocity, as follows:
where v= c= speed of light in vacuum = 3*10⁸ m/s
d= distance between mountaintops = 52 km = 52*10³ m
⇒ t = 0.2 ms (with two significative figures)
<span>In this circuit the electrons flow in a counter-clockwise direction, </span>
<span>Nitrogen forms : N ≡ N , Oxygen forms: O = O
N: 2s2 2p3 O: 2s2 2p4
Bond order for ¹⁴N - ¹⁶O bond:
= (number of bonding electrons - number of antibonding electrons)/2
= [ (2 from N +4 from O) - 1 from N ] / 2 = 2.5
m1 = 14u m2 = 16u
reduced mass = μ = m1 * m2 / (m1 + m2)
= 112/15 = 7.47 u
μ = 7.47 * 0.001 kg / 6.023 * 10²³ = 1.239 * 10⁻²⁶ kg
k = force constant = 1150 N/m
c = speed of light = 3 * 10¹⁰ cm/s</span>
Energy is the ability to do work.
So work can not be done without the transfer of energy from one body to another.
Work is the transfer of energy.