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Alexxandr [17]
3 years ago
10

If humans cannot see ultraviolet waves how can ultraviolet light be used to gather evidence of a crime

Physics
2 answers:
andrew11 [14]3 years ago
8 0
Ultraviolet light is invisible but it gets absorbed by body fluids like blood or semen and can be re-emitted as visible light. In a darkened crime scene, body fluids will show up and can be collected and analysed.
Liono4ka [1.6K]3 years ago
3 0

Answer:

Ultra violet detects the presence of radioactive substances. Ultra violet light causes substances to fluoresce and give off visible light.

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3 years ago
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Differences between tungsten and nichrome​
d1i1m1o1n [39]

Answer:

Tungsten is made of tungsten while Nichrome is made of nickel chromium.

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3 years ago
A boy throws a baseball onto a roof and it rolls back down and off the roof with a speed of 4.05 m/s. If the roof is pitched at
AlekseyPX

(a) The time the baseball spends in the air is 0.92 s.

(b) The horizontal distance from the roof edge to the point where the baseball lands on the ground is 3.1 m.

<h3>Time spent in air by the baseball</h3>

h = vt - ¹/₂gt²

-2.1 = (4.05 x sin 34)t  - ¹/₂(9.8)(t²)

-2.1 = 2.26t - 4.9t²

4.9t² - 2.26t - 2.1 = 0

t = 0.92 s

<h3>Horizontal distance traveled by the baseball</h3>

R = Vx(t)

R = (4.05 x cos 34)(0.92)

R = 3.1 m

Thus, the time the baseball spends in the air is 0.92 s.

The horizontal distance from the roof edge to the point where the baseball lands on the ground is 3.1 m.

Learn more about horizontal distance here: brainly.com/question/24784992

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