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IrinaK [193]
3 years ago
12

PLEASE HELP! I NEED TO ANSWER THIS QUICKLY!

Physics
1 answer:
rodikova [14]3 years ago
4 0

Answer:

I'm not a genius ok?

Explanation:

1. Radar communication, Analysis of the molecular and atomic structure, telephone communication

2. c

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It is very important because scientists, especially the ones with empirical experiments and results, are prone to error and the empirical data is in need to be under strict observation done not only by many scientists but also by expermiented ones. This guards everybody to change the parameters suddenly which can affect the real results of an experiment 

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The weight of a block on the inclined plane is 500 N and the angle of incline is 30 degrees. What is the magnitude of the force
yanalaym [24]

Answer:

250 N

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Explanation:

N = Normal force by the surface of the inclined plane

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f = static frictional force acting on the block

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f = W Sin30

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f = 250 N

Perpendicular to incline force equation is given  

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N = 433 N

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3 years ago
An electric current is flowing through a long cylindrical conductor with radius a. The current density J is uniform in the cylin
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A car accelerates from 20mi/hr to 60mi/hr. How many times greater is the car's kinetic energy at the higher speed compared to th
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