A block of mass m is pushed against a spring of spring constant k. The spring is compressed by a distance d, the block is then released. It is launched by the spring along a horizontal frictionless surface with a final speed v
A second block, this one having mass 4m is pushed against the same spring and released, gaining a final speed 2v. By what distance was the spring compressed in the second case? A) d
B) 2d
C) 4d
D) 16d
E) 25d
C
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Reactance: What is the reactance of a 1.0-mH inductor at 60 Hz?
A. 0.19 ? B. 0.38 ? C. 2.7 ? D. 5.3 ?
If R = 3.0 k?, C = 5.0 mF, ? = 6.0 V, Q = 15 mC, and I = 4.0 mA, what is the potential difference Vb?Va?
A. ?3.0 V B. +9.0 V C. ?15 V D. +21 V E. ?6.0 V
Which two resistors are in parallel with each other?
a.
R and R4
b.
R2 and R3
c.
R2 and R4
d.
R and R1
A solid nonconducting sphere (radius = 12 cm) has a charge of uniform density (30 nC/m3) distributed throughout its volume. Determine the magnitude of the electric field 15 cm from the center of the sphere
a. 22 N/C b. 49 N/C c. 31 N/C d. 87 N/C e. 26 N/C