In the light curve below, what is the period of the eclipsing binary?
a. 5 days
b. 32.5 days
c. 7.5 days
d. 42.5 days
e. 50 days
B
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A car is traveling along a highway at 65 mph. What is the linear speed of the top of the tires? What is the linear speed at the bottom of the tires?
What will be an ideal response?
If two sources of slightly different frequency and different amplitudes create waves at the same time, the resulting superposition of those waves can be described as
A) a wave with an amplitude that varies from zero to an amplitude equal to the sum of individual amplitudes. This variation would occur at a frequency equal to the difference in source frequencies. B) a standing wave with an amplitude equal to the average of the amplitudes of the individual waves and a frequency equal to the average of individual frequencies. C) a wave with an amplitude that varies from an amplitude of the difference in individual amplitudes to an amplitude equal to the sum of individual amplitudes. This variation would occur at a frequency equal to the difference in source frequencies. D) a standing wave with an amplitude equal to the sum of the amplitudes of the individual waves and a frequency equal to the average of individual frequencies. E) a standing wave with an amplitude equal to the product of the amplitudes of the individual waves and a frequency equal to the sum of individual frequencies.
A segment of wire carries a current of 25 A along the x axis from x = ?2.0 m to x = 0 and then along the y axis from y = 0 to y = 3.0 m. In this region of space, the magnetic field is equal to 40 mT in the positive z direction. What is the magnitude of the force on this segment of wire?
A. 2.0 N B. 5.0 N C. 1.0 N D. 3.6 N E. 3.0 N
An object of mass m is suspended by two coplanar wires, as shown below. The tension in each wire has a magnitude given by
a.
