Answer:
θ = 22.2
Explanation:
This is a diffraction exercise
a sin θ = m λ
The extension of the third zero is requested (m = 3)
They indicate the wavelength λ = 630 nm = 630 10⁻⁹ m and the width of the slit a = 5 10⁻⁶ m
sin θ = m λ / a
sin θ = 3 630 10⁻⁹ / 5 10⁻⁶
sin θ = 3.78 10⁻¹ = 0.378
θ = sin⁻¹ 0.378
to better see the result let's find the angle in radians
θ = 0.3876 rad
let's reduce to degrees
θ = 0.3876 rad (180º /π rad)
θ = 22.2º
the answer is True you can convert matter and energy
Answer:
35.7kJ
Explanation:
we can calculate the amount of heat energy required , using this formula
Q = mcθ
where.
Q = heat energy (Joules, J)
m = mass of a substance (kg)
c = specific heat capacity (units
)
θ = change in temperature (Celcius,C or Kelvin K)
Assume Specific heat capacity (c) of water =![4200Jkg^{-1} C^{-1}](https://tex.z-dn.net/?f=4200Jkg%5E%7B-1%7D%20C%5E%7B-1%7D)
mass =0.1 kg
![Q=0.1 kg*4200Jkg^{-1} C^{-1}*85C\\=35700J\\=35.7kJ](https://tex.z-dn.net/?f=Q%3D0.1%20kg%2A4200Jkg%5E%7B-1%7D%20C%5E%7B-1%7D%2A85C%5C%5C%3D35700J%5C%5C%3D35.7kJ)
A is the answerrrrrrrrrrrr
B acid rain in an area kills fish in a lake