Describe the central bulge of our galaxy
What will be an ideal response?
It is a flattened cloud of billions of stars about 6 kpc in diameter, containing little gas and dust. It is the most crowded part of the spherical component, and consists mostly of stars that are old and cool.
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Simple Pendulum: Suppose you want to set up a simple pendulum with a period of 2.50 s. How long should it be(a) on Earth, at a location where g = 9.80 m/s2?(b) on a planet where g is 5.00 times what it is on Earth?
What will be an ideal response?
A segment of wire of total length 2.0 m is formed into a circular loop having 5.0 turns. If the wire carries a 1.2-A current, determine the magnitude of the magnetic field at the center of the loop.
A. 79 ?T B. 69 ?T C. 59 ?T D. 89 ?T E. 9.4 ?T
When a potential difference of 10 V is placed across a certain solid cylindrical resistor, the current through it is 2 A. If the diameter of this resistor is now tripled, the current will be
A) 18 A. B) 2/9 A. C) 2 A. D) 3 A. E) 2/3 A.
In a Young's double slit experiment, what is the ratio of the intensity at a point where the electric fields are out of phase by 30° to the central intensity
A) 0.93 B) 1.9 C) 2.1 D) 0.47 E) 0.75