What is the effective (rms) current value for an AC current with an amplitude of 15.4 A?
a. 15.4 A
b. 7.70 A
c. 10.9 A
d. 3.92 A
e. 2.77 A
c
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Equilibrium: An irregularly shaped object that is 10 m long is placed with each end on a scale. If the scale on the right reads 96 N while the scale on the left reads 71 N, how far from the left end is the center of gravity of this object?
A. 5.7 m B. 7.4 m C. 4.3 m D. 14 m
A car that is initially moving at 7.50 m/s begins to accelerate forward uniformly at 0.550 m/s2
(a) How long after beginning to accelerate does it take the car to move 3.50 km? (b) How fast is the car moving just as it has traveled 3.50 km? What will be an ideal response?
In a single-slit diffraction experiment, the central maximum is broadened if the wavelength of light is increased
Indicate whether the statement is true or false
A 10.0-kg rod has a varying linear density that is symmetric about the midpoint of the rod. The moment of inertia about an axis perpendicular to the rod that passes through the rod 30.0 cm from its midpoint is 5.00 kg?m2
What is the moment of inertia about an axis perpendicular to the rod that passes through the rod 20.0 cm from its midpoint? A) 7.50 kg?m2 B) 4.50 kg?m2 C) 5.10 kg?m2 D) 4.90 kg?m2 E) Answer depends on whether the new axis is on the same side of the midpoint as the 30.0 cm distant axis or if its on the opposite side of the midpoint.