Assuming the the car is travelling to the right (→):




The information we know:



Using one of the equations of motion:





Answer:
The minimum thickness is 
Explanation:
generally the equation for thin film interference is mathematically represented as

Where t the thickness
m is any integer
n is the refractive index of the film
is the wavelength of light
Since we are looking for the thickness we make t the subject of the formula

m= 0 cause the thickness is minimum at m=0
Substituting values


Connect the little light thingys to the top of the battery
Traditional is the old way of doing stuff, Command is a system ruled by one person, Market is having buyers and sellers make economic decisions
The sound absorption for wood is greater than the sound absorption coeffiecient for concrete at most frequencies, hence based on the coefficient of absorption for each material, wood is the best choice.