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zubka84 [21]
3 years ago
12

When a hypothesis is wrong, scientists often begin by revising the (blank)

Physics
2 answers:
Volgvan3 years ago
8 0
When a hypothesis is wrong , scientists often begin by revising the hypothesis and redesign the experiment
Vsevolod [243]3 years ago
7 0
I might be wrong, but. The words seem to fit. 

When a hypothesis is wrong, scientists often begin by revising the question after that, its common for scientists to redesign the experiment.
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What work is done by the electric force when the charge moves a distance of 2.70 m at an angle of 45.0∘ downward from the horizo
Andreyy89

Incomplete question as many data is missing.I have assumed value of charge and electric field.The complete question is here

A charge of 28 nC is placed in a uniform electric field that is directed vertically upward and that has a magnitude of 5.00×10⁴ V/m.

What work is done by the electric force when the charge moves a distance of 2.70 m at an angle of 45.0 degrees  downward from the horizontal?

Answer:

W_{work}=2.67*10^{-3}J

Explanation:

Given data

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Distance d=2.70 m

Angle α=45°

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Work done by electric force

Solution

W_{work}=F_{force}*D_{distance}Cos\alpha  \\where\\F_{force}=q_{charge}*E_{Electric-Field}\\So\\W_{work}=qE*D*Cos\alpha \\W_{work}=(28*10^{-9}C )(5.00*10^{4}V/m )(2.70m)Cos(45)\\W_{work}=2.67*10^{-3}J

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