In a two-dimensional Cartesian system, the x-component of a vector is known, and the angle between vector and x-axis is known. Which operation is used to calculate the magnitude of the vector? (taken with respect to the x-component)
a. dividing by cosine
b. dividing by sine
c. multiplying by cosine
d. multiplying by sine
a
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Based on the above graph, which statement about the sunspot cycle is true?
A) The period of the cycle is always exactly 11 years. B) Some solar minima (when the Sun has the fewest sunspots) have significantly fewer sunspots than others. C) Some solar maxima (when the Sun has the most sunspots) have significantly more sunspots than others. D) At least 1% of the Sun's surface is covered with sunspots at all times.
Stars with multiple planets orbiting them are expected to be rare
Indicate whether the statement is true or false
________ is the scientific study of the distribution of electromagnetic waves by energy and how these patterns are created in atoms and molecules
Fill in the blank(s) with correct word
A series RLC circuit has a 150-? resistor, a 6.00-mH inductor and a 0.200-?F capacitor connected across a 120-V rms ac source at 15.0 kHz. What is the phase angle of the circuit?
A) 47.3° B) 0° C) 45.0° D) 90.0° E) 73.7°