Answer:
PART A: option b. .43nm
PART B: option d. 0.11nm
PART C: option c. The wavelengths of visible light are too long compared to the atomic spacing.
Explanation:
Given data
Wavelength λ = 0.20 nm
Angle θ = 0.8 rad
(a)
wavelength of x-ray to give maximum at the same location
λ₂ = m λ
Here, m = 2 is the interference fringe order.
Substitute the values in the above equation.
λ₂ = 2 × 0.2
= 0.4 nm
Hence, the wavelength of x-ray to give maximum at the same location is 0.4nm
(b)
The crystal plane separation is equal to d
The value of θ is equal to 0.8 rad.
Convert rad into degree as follows:
0.8 rad = 
= 144°/π = 45.86°
Solve for d, using equation (1) as follows:
2dsinθ = mλ
d = mλ / 2sinθ
d = (1) 0.17 / 2Sin45.86°
d = 0.17 / 1.9065
d = 0.089 nm
(c)
The visible light can not be used to study the structure of proteins because of the high wavelength of the visible light.
For finding a momentum p=mv so p=9×2 , P=18
Answer:
Acceleration will be 
Explanation:
We have given that car is traveling with speed 34 miles per hour
So initial speed of the car u = 34 miles per hour
After 2 hour speed will be 84 miles per hour
So final speed V = 84 miles per hour
Time = 2 hour
From first equation of motion we know that 
So acceleration 
It will stay in motion unless an outside force slows it down.
Answer:
1. Yes, BEVs or hydrogen fuel cell vehicles are a more promising transportation technology for the future.
2. Yes, car companies should be require to produce electric cars.
Explanation:
- BEV stands for battery electric vehicle which is a type of electric vehicle. These vehicle and hydrogen fuel vehicles are a promising transportation technology for future as traditional vehicles along with other factors have polluted the earth so much that now we have to minimize the carbon footprint. The natural resources of fuel are also getting scare. So, these batteries assisted and eco-friendly are the need of the present and are vital in playing a important role in transportation in future.
- Car companies should be require to produce electric cars as some companies like Tesla has already their electric car in the market lately. The countries in the scandinavian region have adopted the policy to promote and use this vehicles so company come forward to provide eco-friendly and price competitive vehicles so everyone can take the advantage.
