What is the current through a resistor if 4.0 × 1016 electrons pass a point in the resistor in 0.50 s? (e = 1.60 × 10-19 C)
A) 0.013 A
B) 0.31 A
C) 6.3 A
D) 78 A
A
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An equation that describes the displacement in Simple Harmonic Motion is: x(t) = 1.20 m sin(2.40 rad/s t). What is the maximum velocity of the SHM?
A. 5.32 m/s B. 4.82 m/s C. 3.68 m/s D. 2.88 m/s E. 2.03 m/s
At a fixed depth within a fluid at rest, the pressure pushing upward is
A) less than the pressure pushing downward. B) zero, because pressure only pushes equal in all horizontal direction. C) zero, because the fluid above does not support the weight of the fluid below. D) greater than the pressure pushing downward. E) equal to the pressure pushing downward.
Addition by 1. Components: Displacement vector 
is 5.5 cm long and points along the +x-axis. Displacement vector 
is 7.5 cm long and points at +30° to the -x-axis.(a) Determine the x and y components of vector 
.(b) Determine the x and y components of vector 
.(c) Determine the x and y components of the resultant of these two
vectors.(d) Determine the magnitude and direction of the resultant of these two vectors. What will be an ideal response?
A 12,000-N car is raised using a hydraulic lift, which consists of a U-tube with arms of unequal areas, filled with oil with a density of 800 kg/m3 and capped at both ends with tight-fitting pistons
The wider arm of the U-tube has a radius of 18.0 cm and the narrower arm has a radius of 5.00 cm. The car rests on the piston on the wider arm of the U-tube. The pistons are initially at the same level. What is the force that must be applied to the smaller piston in order to lift the car after it has been raised 1.20 m? For purposes of this problem, neglect the weight of the pistons. A) 1.88 kN B) 0.954 kN C) 3.67 kN D) 1.96 kN E) 1.20 kN