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metchelle

Based on the given formula that Rosa uses to do a calculation, the value that Rosa is most likely trying to find is power in circuits specifically active power P in kW. Where Vi is the applied voltage and t is the input current. Hope this is the answer that you are looking for.

Answer:

The horizontal displacement of a projectile launched at an angle.

Explanation:

If the formula used by Rosa is \(v_i\ cos\theta\) where \(v_i\) is the initial speed of the object or the velocity with which the object is thrown. There are two component of velocities i.e. horizontal and vertical. If \(\theta\) is the angle with horizontal. We know that distance travelled is given by :

\(d=v_i\ cos\theta \times t\)

So, Rosa is finding the horizontal displacement of a projectile launched at an angle.

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