Would it be possible to place a nonreflective coating on an airplane to cancel radar waves of wavelength 3 cm?

An inventor notices that a soap bubble is dark at its thinnest and realizes that destructive interference is taking place for all wavelengths. How could she use this knowledge to make a nonreflective coating for lenses that is effective at all wavelengths? That is, what limits would there be on the index of refraction and thickness of the coating? How might this be impractical?

While contemplating the food value of a slice of ham, you notice a rainbow of color reflected from its moist surface. Explain its origin.

In everyday experience, why are radio waves polarized, whereas light is not?

In placing a sample on a microscope slide, a glass cover is placed over a water drop on the glass slide. Light incident from above can reflect from the top and bottom of the glass cover and from the glass slide below the water drop. At which surfaces will there be a phase change in the reflected light?

Answer the above question if the fluid between the two pieces of crown glass is carbon disulfide.

What could happen to the drift velocity of the electrons in a wire and to the current in the wire if the electrons could move through it freely without resistance?

Freddy drove a stake into the ground, looped a 12-foot-long rope over it, and walking around the stake to mark off a circle. What was the ratio of the radius to the diameter of the circle?

How much compound interest is earned by investing 20,000 euro at 12% p.a. if the investment is over a 4 year period?

The cutoff frequency of a material is $f_0$. Are electrons emitted from the material when light of frequency greater than $f_0$ is incident on the material?

Assuming an operating frequency of $1 \text{ kHz}$, transform the following phasor expressions into a single cosine function in the time domain: (a) $9\angle 65^{\circ}\;\mathrm{V}$. (b) $\dfrac{2\angle 31^{\circ}}{4\angle 25^{\circ}}\;\mathrm{ A}$. (c) $22\angle 14^{\circ}- 8\angle 33^{\circ}\;\mathrm{V}$.

Place two cans of soft drinks, one regular and one diet, in a container of water. You will find that the diet drink floats while the regular one sinks. Use Archimedes’ principle to devise an explanation. Broad Hint: The artificial sweetener used in diet drinks is less dense than sugar.

When nitroglycerin detonates, it produces large volumes of hot gases almost instantly according to the following equation:

$$4 \mathrm { C } _ { 3 } \mathrm { H } _ { 5 } \mathrm { N } _ { 3 } \mathrm { O } _ { 9 } ( l ) \rightarrow 6 \mathrm { N } _ { 2 } ( g ) + 12 \mathrm { CO } _ { 2 } ( \mathrm { g } ) + 10 \mathrm { H } _ { 2 } \mathrm { O } ( g ) + \mathrm { O } _ { 2 } ( \mathrm { g } )$$

a. When 0.100 mol of nitroglycerin explodes, what volume of each gas measured at STP is produced? b. What total volume of gases is produced at

$$300 . ^ { \circ } C$$

and 1.00 atm when 10.0 g of nitroglycerin explodes?

Tamara arranged 144 books into 8 equal stacks. How many books were in each stack?