Which is one reason why gravitational waves have proved so hard to detect?
a. They probably have infinitesimally small wavelengths.
b. The strength of gravity is a tiny fraction of the strength of the electromagnetic force.
c. They would travel from many light years away at a very small fraction of the speed of light.
d. Their wavelengths would be infinitesimally small compared with the distance through space that they travel.
e. They are probably so different from other kinds of waves that it is difficult to theorize about how to detect them.
b
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Determine the rms voltage drop across the resistor in the circuit.
A. 55 V B. 77 V C. 9.9 V D. 5.5 V E. 61 V
A Hooke's law spring is mounted horizontally over a frictionless surface. The spring is then compressed a distance d and is used to launch a mass m along the frictionless surface. What compression of the spring would result in the mass attaining double the kinetic energy received in the above situation?
a. 1.41d b. 1.73d c. 2.00d d. 4.00d
Series/Parallel Circuits: Three resistors of 12 ?, 12 ?, and 6.0 ? are connected together, and an ideal 12-V battery is connected across the combination. What is the current from the battery if they are connected (a) in series or (b) in parallel?
Fill in the blank(s) with the appropriate word(s).
Briefly discuss the effect of active galaxies on the clusters of galaxies
What will be an ideal response?