A reasonable estimate is 1 x 10^3 feet. By elimination, the first and second can't be since it will yield a negative answer and height can't be negative. Next, the fourth option will yield almost 1800 miles tall which is an impossible height. So the third is the reasonable estimate. Hope it helps.
Answer:
The minimum angular spread of the laser beam is 3.32 × radians (or 3.32 μrad).
Explanation:
The minimum angular spread of a wave is the ratio of its narrowest diameter to its wavelength.
From Rayleigh's formula,
Angular spread = 1.22 (wavelength ÷ diameter)
= 1.22 (λ ÷ D)
Given that:
diameter, D = 0.18 m and wavelength, λ = 490 nm, then;
Angular spread of the laser beam = 1.22 (λ ÷ D)
= 1.22
= 1.22× 2.7222 ×
= 3.3211 × rad
The minimum angular spread of the laser beam is 3.32 × radians.
Answer:
As You know kinetic Energy is equal (mv^2)/2
You can increase it by increasing the mass(keeping the velocity)
Or You can add velocity
Explanation:
Answer:
Explanation:H2 which is mean 2 atoms of hydrogen
The thermal efficiency of a combustion system is simply
the ratio of heat out and heat in, that is:
efficiency = heat out / heat in
efficiency = 1030 J / 1540 J
efficiency = 0.669
<span>So the efficiency is 0.669</span>