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Finding modulus and argument of complex number (x+iy)

Draw argand diagram Modulus=|z|= length of the line So |z|=(x 2 +y 2 ) 0.5 Argument=Angle between real (x axis) and line so arg(z)=arctan(y/x)
EF
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Explain the rising importance of PACs and Super-PACs

The “PAC” acronym stands for “Political Action Committee”, with PACs being significant aspects of the campaign finance aspects of the political system within the US. Regular PACs are subject to spending limi...
WH
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Explain why the verb ‘mettre’ in its past tense form as it appears in the following sentence “Il a décroché la casserole et l’a mise sur la table” has a feminine ending or terminaison (despite the auxiliary’s verb ‘avoir’’s neutrality)?

Generally the past participle doesn’t agree with any noun when the auxiliary verb ‘avoir’ is used. For example: ‘Elles ont acheté des bottes’ despite the subject ‘elles’ and the direct object ‘bottes’ being ...
CH
Answered by Clemency H. • French tutor
3731 Views

Describe the forces acting on an object on earth falling through the air, and how they change from when the object is first released into the air leading to terminal velocity.

The two forces acting on the object are weight due to gravity pulling the object towards earth, and drag resisting this motion. When the object is first released, drag is small as velocity is low, so the res...
JE
Answered by Julia E. • Physics tutor
33816 Views

What is a catalyst, and how does it affect the rate of reaction?

A catalyst is a substance which provides an alternative pathway requiring a lower activation energy for the chemicals to react, and speeds up the rate of reaction. A catalyst also remains chemically unchange...
JE
Answered by Julia E. • Chemistry tutor
2909 Views