Acid rain is rainfall made sufficiently acidic by atmospheric pollution that it causes environmental harm, typically to forests and lakes. The main cause is the industrial burning of coal and other fossil fuels, the waste gases from which contain sulfur and nitrogen oxides, which combine with atmospheric water to form acids.
Answer:
0.421 cm
Explanation:
Volume of a cylinder is:
V = πr²h
where r is the radius and h is the height or length.
Given V = 1.932 cm³ and h = 3.47 cm:
1.932 = πr² (3.47)
0.557 = πr²
r² = 0.177
r = 0.421
The radius is 0.421 cm.
Answer:
θ₁ = 3.35 10⁻⁴ rad
, θ₂ = 8.39 10⁻⁵ rad
Explanation:
This is a diffraction problem for a slit that is described by the expression
sin θ = m λ
the resolution is obtained from the angle between the central maximum and the first minimum corresponding to m = 1
sin θ = λ / a
as in these experiments the angle is very small we can approximate the sine to its angle
θ = λ / a
In this case, the circular openings are explicit, so the system must be solved in polar coordinates, which introduces a numerical constant.
θ = 1.22 λ / D
where D is the diameter of the opening
let's apply this expression to our case
indicates that the wavelength is λ = 550 nm = 550 10⁻⁹ m
the case of a lot of light D = 2 mm = 2 10⁻³ m
θ₁ = 1.22 550 10-9 / 2 10⁻³
θ₁ = 3.35 10⁻⁴ rad
For the low light case D = 8 mm = 8 10⁻³
θ₂ = 1.22 550 10-9 / 8 10⁻³
θ₂ = 8.39 10⁻⁵ rad
Answer
decreases
Explanation
Frequency and wavelength are inversely proportional to each other. And if wavelength increases, its frequency decreases.
By definition, the power is given by:
Where,
F: Force
d: distance traveled
t: time
The power units is watts.
Substituting values we have:
Making the corresponding calculations we have:
Answer:
he uses 63 watts of power:
