How does the light from active galaxies differ from that of a normal galaxy?
What will be an ideal response?
Light from a normal galaxy peaks in the visible part of the electromagnetic spectrum and is primarily stellar in nature. The light from an active galaxy peaks either at longer or shorter wavelengths than the visible and is primarily nonstellar in nature.
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A car is traveling along a highway at 65 mph. What is the linear speed of the bottom of the tires?
What will be an ideal response?
Wire is wound on a square frame, 30 cm by 30 cm, to form a coil of 7 turns. The frame is mounted on a horizontal shaft through its center (perpendicular to the plane of the diagram), as shown in the figure
The coil is in clockwise rotation, with a period of 0.060 s. A uniform, horizontal, magnetic field of magnitude 0.40 T is present. At a given instant, the plane of the coil forms a 60° angle with the horizontal, as shown. At that instant, what is the magnitude of the emf induced in the coil? A) 13 V B) 23 V C) 2.1 V D) 3.6 V E) 26 V
An object is in front of a concave spherical mirror, and its image is 4.0 cm behind the mirror. If the focal length of the mirror has a magnitude of 5.0 cm, where is the object?
A) 2.2 cm in front of the mirror B) 2.2 cm behind the mirror C) 9.0 cm in front of the mirror D) 1.0 cm behind the mirror
Discuss the differences between distance and displacement
What will be an ideal response?