Vector a Has a Magnitude of 3 $-90.0^{\circ}$ With the Positive X-Axis

question 93

Multiple Choice

Vector A has a magnitude of 3.0 units and makes an angle of $-90.0^{\circ}$ with the positive x-axis.Vector B has a magnitude of 4.0 units and makes an angle of $-120^{\circ}$ with the positive x-axis.What is the direction of the vector sum of A + B referenced to the positive x-axis?

• A) \(-107^{\circ}\)
• B) \(55^{\circ}\)
• C) \(-55^{\circ}\)
• D) \(-145^{\circ}\)

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Definitions:

ECG

An ECG, or Electrocardiogram, is a medical test that measures the electrical activity of the heart to identify abnormalities in heart rhythm and structure.

Color Code

A system for displaying information by using different colors for easy identification and categorization.

Lead Arrangement

In the context of electrocardiography, lead arrangement refers to the configuration and placement of electrodes on the body to measure the heart's electrical activity.

Electrodes

Conductor materials used to make electrical contact with a nonmetal part of a circuit, often used in medical devices and experiments.