Answer:
F = 51.3°
Explanation:
The component of weight parallel to the inclined plane must be responsible for the rolling back motion of the car. Hence, the force required to be applied by the child must also be equal to that component of weight:
where,
W = Weight of Wagon = 150 N
θ = Angle of Inclinition = 20°
Therefore,
<u>F = 51.3°</u>
Answer:
Explanation:
We can use Newton's Second Law to solve this exercise, which states that an object of mass m subjected by a force of magnitude F will experiment an acceleration given by the formula F=ma. I our case we want the acceleration, so we can write a=F/m, and use the values given:
a=F/m=(1000N)/(1000kg)=1m/s2.
When a photon hits an electron <span>the photon will be partially </span>absorbed<span>and the electron emits another photon with lower energy.</span>
Answer:
λ = 451.7 nm
Explanation:
The expression for the constructive interference of the double diffraction experiment is
d sin θ = m λ
let's use trigonometry
tan θ = y / L
how the experiment occurs at very small angles
tan θ = sin θ / cos θ = sin θ
sin θ = y / L
we substitute
d y / L = m λ
λ =
let's calculate
λ =
λ = 4.51699 10⁻⁷ m
λ = 4.517 10⁻⁷ m (109 nm / 1m)
λ = 451.7 nm