A lens collects light and focuses it into a small spot. This increases the ________ of the light wave.A lens collects light and
1 answer:
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<h3>Answer:</h3>
- E≈2,5 eV
_______________
λ=500 nm = 500·10⁻⁹ m
c=3·10⁸ m/s
h=6,63·10⁻³⁴ J·s = 4,14·10⁻¹⁵ eV·s
_______________
E - ?
_______________
Answer:
Acceleration=
Speed=0.67 m/s
Explanation:
We are given that
Horizontal force=F=20 N
Mass of box=m=40 kg
We know that
Acceleration=
Using the formula
Acceleration of box=
The acceleration of the box=
Initial velocity=u=0
Force=F=30 N
Distance=s=0.3 m
Substitute the values
Hence, the speed of the box after it has been pulled a distance of 0.3 m=0.67 m/s