The design considerations for a timing mechanism require that a mass of 1.6 g should undergo 5 oscillations per second when it is attached to a spring. What should the force constant of a spring be to achieve this?
A)
15.6 N/m
B)
3.1 N/m
C)
7.2 N/m
D)
1.6 N/m
E)
8.0 N/m
D
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Write the Laplace equation for two-dimensional conduction heat transfer through a homogeneous, isotropic material that has constant thermal conductivity.
What will be an ideal response?
The electric field just outside the surface of a hollow conducting sphere of radius 20 cm has a magnitude of 500 N/C and is directed outward. An unknown charge Q is introduced into the center of the sphere and it is noted that the electric field is still directed outward but has decreased to 100 N/C. What is the magnitude of the charge Q?
A. 1.5 nC B. 1.8 nC C. 1.3 nC D. 1.1 nC E. 2.7 nC
If a particle with a charge of 2 coulombs moves through a potential difference of 12 volts, its change in kinetic energy will a have magnitude of
A) 12 J. B) 6 J. C) 8 J. D) 1/6 J. E) 24 J.
Three 10-ohm resistors take the shape of a triangle, one resistor in each leg. Connecting an ohm-meter across any two points of the triangle will show the equivalent resistance to be
A) 1.4 ohms. B) 5 ohms. C) 6.7 ohms. D) greater than 6.7 ohms.