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mario62 [17]
3 years ago
7

Need help with these 4 questions

Physics
1 answer:
dimaraw [331]3 years ago
4 0

Answer: 1. B

2.A

3.B

4. A

Explanation:

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What were two reasons that the Krystal Beslanowitch case was finally closed?
lesantik [10]

Answer:

1. Police Weren't Able To Find Any Real Leads

2. They Didn't Find Any Clues To The Killer Until 18 Years Later

Explanation:

It was unknown at the time, but it would go on to take 18 years for her killer to be arrested and tried for her death. The initial case went on from 1995 to 1997 but ended up closing when the police department was unable to find any real leads.

7 0
2 years ago
What is the name of the process where an object is exposed to nuclear radiation
Murljashka [212]

Answer:

Exposing objects to beams of radiation is called irradiation

6 0
3 years ago
A pulley system has an efficiency of 87.5 percent.
Gelneren [198K]

Answer:

work done on desk = m g h = 105 * 9.81 * 2.46 = 2534 Joules

Explanation:

so work in = 2534 / 0.875 = 2896 Joules

that is your 648 times distance your hand moved holding the rope

2896 = 648 * x

4.47 meters

I think maybe a typo, 648 N is too big, maybe 64.8 ? Any block and tackle system does better than that.

7 0
3 years ago
The main factors that determine the speed of a wave in any particular medium are _____.
vodka [1.7K]

It all depends on what kind of wave, and what kind of medium.

For mechanical waves, like sound and earthquakes, the speed
is determined by the mechanical properties of the medium, like
density and stiffness.

For electromagnetic waves, like radio and light, the speed is
determined by the electrical properties of the medium, like
magnetic permeability and electrostatic permittivity.

That's a big part of the reason why sound and light travel
at different speeds through air, water, and jello.

6 0
3 years ago
What term described the capability to prevent one participant in an electronic transaction from denying it performed an action?
vampirchik [111]

Answer:

Plausible deniability.

Explanation:

Plausible deniability.

It is the ability of a person to refuse to accept knowledge of responsibility, if any secret(demeaning) action is done by others in an organizational hierarchy as there may be lack of evidence to confirm their involvement. Specially for high level official who can willfully deny any awareness of the to avoid themselves getting involved in blame game.

7 0
3 years ago
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