Which type of galaxy has a stellar disk, but without gas and dust?
A) E0
B) E7
C) Irr I
D) S0
E) SE
D
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A string of length L with fixed ends is made to go into standing wave patterns. What is the longest wavelength associated with all possible standing wave patterns in this situation?
a. L/4 b. L/2 c. L d. 2L
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What will be an ideal response?
We find that N current loops are coplanar and coaxial. The first has radius a and current I. The second has radius 2a and current 2I, and the pattern is repeated up to the Nth, which has radius Na and current NI. The current in each loop is counterclockwise as seen from above. The magnitude of the magnetic field at the center of the loops is
A.
.B.
C.
.D.
.E.
.A beam with an overhang is loaded by a uniform load of 3 kN/m over its entire length. Moment of inertia Iz 5 3.36 3 106 mm4 and distances to top and bottom of the beam cross section are 20 mm and 66.4 mm, respectively. It is known that reactions at A and B are 4.5 kN and 13.5 kN, respectively. The maximum bending stress in the beam is approximately:
(A) 36 MPa
(B) 67 MPa
(C) 102 MPa
(D) 119 MPa