Pablo's engineering team has developed a new material that is strong enough to withstand major impacts, including bullets, witho
ut breaking or deforming. He plans to design a new type of motorcycle helmet using the material as its outside covering. A prototype of the helmet is shown below. Pablo knows that other types of motorcycle helmets have outside coverings that bend and deform slightly on impact. So if Pablo's new helmet is going to be as effective at protecting people's heads as existing helmets, he'll need to
A.
slightly reduce the total mass of the new helmet by reducing the amount of internal cushioning.
B.
maximize the total mass of the helmet by adding flexible steel to the outside covering.
C.
increase the amount of cushioning on the inside of the new helmet to help it absorb impacts.
D.
use a thicker outside covering than other helmets to help prevent deformation even further.
A.
slightly reduce the total mass of the new helmet by reducing the amount of internal cushioning.
B.
maximize the total mass of the helmet by adding flexible steel to the outside covering.
C.
increase the amount of cushioning on the inside of the new helmet to help it absorb impacts.
D.
use a thicker outside covering than other helmets to help prevent deformation even further.
1 answer:
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Answer:
Speed:
Wavelength:
Frequency:
Explanation:
The speed of the laser as it travels through polystyrene can be determine by means of the equation of the refraction index:
(1)
Where c is the speed of light and v is the speed of the laser in the medium.
Therefore, v will be isolated from equation 1
Hence, the speed of the laser has a value of
Frenquency:
Since, wavelength is the only one who depends on the media. Therefore the frequency in both medium will be the same.
To determine the frequency it can be used the following equation
(2)
Where c is the speed of light, is the frequency and
is the wavelength
Then, wil be isolated from equation 2.
(3)
Before using equation 3 it is necessary to express in units of meters.
⇒
Hence, the frequency of the laser has a value of
Wavelength:
To determine the wavelength it can be used:
Where v is the speed of the laser through the polystyrene.
Hence, the wavelength of the laser has a value of