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![(\frac{490*10^{-9} }{0.18})](https://tex.z-dn.net/?f=%28%5Cfrac%7B490%2A10%5E%7B-9%7D%20%7D%7B0.18%7D%29)
= 1.22× 2.7222 × ![10^{-6}](https://tex.z-dn.net/?f=10%5E%7B-6%7D)
= 3.3211 ×
rad
The minimum angular spread of the laser beam is 3.32 ×
radians.
Force = (mass) x (acceleration)
Force = (18 kg) x (3 m/s²) = 54 newtons
As long as you continue pushing the cart with 54 newtons of force,
it will accelerate at 3 m/s².
At the instant you release it, or keep your hands on it but stop pushing,
it will stop accelerating. It'll continue forward at the speed it had when
the 54 newtons of force stopped.
Gravity!! It also keeps the planets in orbit!
A. Golf ball because it has the most mass and will travel faster when felling
Answer:
0.1m
Explanation:
k = 64N/m
Ep = 0.32J
x = ?
Ep = 1/2 * kx²
make x the subject of the formula
x² = 2Ep/k
x = √(2Ep/k)
x = √(0.64/64)
x = √0.01
x = 0.1m