A resistor, inductor, and capacitor are connected in series, each with an effective (rms) voltage of 63 V, 176 V, and 65 V, respectively. What is the magnitude of the phase angle in this circuit?
a. 30°
b. 64°
c. 59°
d. 60°
e. 69°
d
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Betelgeuse is a star in the constellation Orion. It radiates heat at the rate of 3.00 × 1030 W and has a surface temperature of 3000 K
Assuming that it is a perfect emitter, what is the radius of Betelgeuse? The Stefan-Boltzmann constant is 5.67 x 10-8 W/(m2•K4). A) 7.80 × 1010 m B) 8.70 × 1010 m C) 1.40 × 1011 m D) 1.90 × 1011 m E) 2.30 × 1011 m
Jane walks 31 steps eastward and 16 steps southward. What is her displacement if each step averages 0.82 meters?
What will be an ideal response?
Four identical particles (mass of each = 0.24 kg) are placed at the vertices of a rectangle (2.0 m × 3.0 m) and held in those positions by four light rods which form the sides of the rectangle. What is the moment of inertia of this rigid body about an axis that passes through the center of mass of the body and is parallel to the shorter sides of the rectangle?
a. 2.4 kg×m2 b. 2.2 kg×m2 c. 1.9 kg×m2 d. 2.7 kg×m2 e. 8.6 kg×m2
Briefly describe the modern theory of how our Moon formed
What will be an ideal response?