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goblinko [34]
4 years ago
14

What is physical science

Physics
1 answer:
AlladinOne [14]4 years ago
4 0
The science that concerned with the study of natural objects, physics, chemistry, astronomy and related subjects. It is mostly the study of physical environment. 
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valina [46]

Answer:

=2.99\times10^9J

Explanation:

According to the question

net force F = 2.20×10^6 N

displacement S = 0.72\times10^3m

from figure , the horizontal forces are same in magnitude and opposite direction.

so , neglect these two forces.

we can take only vertical components of the force.

total force F' = F cos 19° + F cos 19°

= 2×F×cos 19°   ................. (1

therefore , total work is

W = F'S

= (2F cos19)×S

= (2)(2.20\times10^6 N)cos19° (0.720\times10^3 m)

=2.99\times10^9J

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Why are electrons, rather than protons, the principal charge carriers in metal wires?
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