An alternating source with a variable frequency, a capacitor with capacitance C , and a resistor with resistance R are connected in series. Figure 31-29 gives the impedance Z of the circuit versus the driving angular frequency ω d ; the curve reaches an asymptote of 500 Ω, and the horizontal scale is set by ω ds = 300 rad/s. The figure also gives the reactance X c for the capacitor versus ω d . What are (a) R and (b) C ? Figure 31-29 Problem 36.
An alternating source with a variable frequency, a capacitor with capacitance C , and a resistor with resistance R are connected in series. Figure 31-29 gives the impedance Z of the circuit versus the driving angular frequency ω d ; the curve reaches an asymptote of 500 Ω, and the horizontal scale is set by ω ds = 300 rad/s. The figure also gives the reactance X c for the capacitor versus ω d . What are (a) R and (b) C ? Figure 31-29 Problem 36.
An alternating source with a variable frequency, a capacitor with capacitance C, and a resistor with resistance R are connected in series. Figure 31-29 gives the impedance Z of the circuit versus the driving angular frequency ωd; the curve reaches an asymptote of 500 Ω, and the horizontal scale is set by ωds = 300 rad/s. The figure also gives the reactance Xc for the capacitor versus ωd. What are (a) R and (b) C?
Three objects with masses m₁ = 3.8 kg, m₂ = 12 kg, and m 19 kg, respectively, are attached by strings over frictionless pulleys as indicated in the figure below. The horizontal surface exerts a force of friction of 30 N on m2. If the system is released from rest, use energy concepts to
find the speed of m¸ after it moves down 4.0 m.
m/s
m
m2
mg
In order for Jane to return to base camp, she needs to swing across a river of width D that is filled with alligators. She must swing into a wind exerting constant horizontal force F,
F = 110 N, L = 40.0 m, 0 = 50.0°, and her mass to be 50.0 kg.
Wind
→F
Tarzan!
Jane
(a) with what minimum speed (in m/s) must Jane begin her swing to just make it to the other side? (If Jane can make it across with zero initial velocity, enter 0.)
m/s
on a vine having length L and initially making an angle with the vertical (see below figure). Take D = 48.0 m,
(b) Shortly after Jane's arrival, Tarzan and Jane decide to swing back across the river (simultaneously). With what minimum speed (in m/s) must they begin their swing? Assume that Tarzan has a mass of 80.0 kg.
m/s
R=2.00
12V
2.00
4.00
4.002
What is the current in one of the 4.0 Q resistors?
An isolated point charge q is located at point X. Two other points Y and Z are such
that YZ2 XY.
Y
X
What is (electric field at Y)/(electric field at Z)?
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