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3 years ago

1. What is the difference between a patent, latent, and plastic shoe Impression?

Physics

2 answers:

Irina-Kira [14]3 years ago

4 0

Answer:

Patent fingerprints can be made by blood, grease, ink, or dirt. This type of fingerprint is easily visible to the human eye. Plastic fingerprints are three-dimensional impressions and can be made by pressing your fingers in fresh paint, wax, soap, or tar.

I Hope this helps!

Sincerely; Victoria<3

Explanation:

Fittoniya [83]3 years ago

3 0

There are three kinds of shoeprints: patent, plastic, and latent. Patent shoeprints are clearly visible and come from tracking through a substance like paint or dirt and leaving some behind each time a step is taken. A plastic shoeprint occurs when a shoe sinks into a soft substance like snow or mud.

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Energy can be described in many ways. From the list below, what is the best definition of energy?

max2010maxim [7]

the strength and vitality required for sustained physical or mental activity.

"changes in the levels of vitamins can affect energy and well-being"

synonyms: vitality, vigor, life, liveliness, animation, vivacity, spirit, spiritedness, verve, enthusiasm, zest, vibrancy, spark, sparkle, effervescence, ebullience, exuberance, buoyancy, sprightliness; More

power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.

Have a great day ~Matya

8 0

3 years ago

Read 2 more answers

An engine absorbs 2150 J as heat from a hot reservoir and gives off 750 J as heat to a cold reservoir during each cycle. What is

tia_tia [17]

Answer:

65.2 %

Explanation:

Let Q1 = Heat absorbed by the system

Q2 = Heat released by the system

e= (1 - (Q2/Q1)) x 100

e= (1 - (750/2150)) x 100

e= (1 - 0.348) x 100

e= 0.652 x 100

e= 65.2 %

6 0

4 years ago

Nicole's office is 5 m wide and 3 m long. What is the area?

Sloan [31]

Area is calculated as length times width.
In this case, the width is 5 m and the length is 3 m.
5 • 3 = 15
So the area of Nicole's office is 15 square meters.
Square meters because only length and width is 2 dimensional.

Hope this helps!

6 0

3 years ago

Read 2 more answers

While studying physics at the library late one night, you noticethe image of the desk lamp reflected from the varnished tabletop

Natalija [7]

<h2>Answer: 1.73</h2>

Explanation:

The situation described here is known as polarization by reflection. This was discovered by Scottish physicist David Brewster and then formulated the law that bears his name:

<em>"When a beam of light hits the surface that separates two non-conducting media characterized by different electromagnetic characteristics (electrical permittivity and magnetic permeability), part of it is reflected back to the source medium, and part is transmitted to the second medium."</em>

This polarization happens when the light incides at a specific angle, called the Brewster angle ( $\theta_{B}$ ), which is given by the following formula (<u>taking into account that generally the magnetic permeabilities of the two media involved do not vary):</u>

$tan\theta_{B}=\frac{n_{2}}{n_{1}}$ (1)

Where $n_{2}$ is the index of refraction of the second medium (the varnish in this case) and $n_{1}=1$ is the index of refraction of the first medium (the air).

Now, if we are told the angle between the incident and reflected rays is $120\°$ , this means the incident angle is the half ( $60\°$ ), which is the Brewster angle in this case.