Granulation is evidence that energy in the photosphere ____
a. is flowing upward
b. is flowing downward towards the core
c. stays horizontal on the surface
d. is spiraling westward
e. is spiraling eastward
a
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A cylindrical tank is assembled by welding steel sections in a helical pattern with angle ? 5 50°. Tank diameter is 1.6 m, thickness is 20 mm, and internal pressure is 2.75 MPa. Modulus E 5 210 GPa and Poisson’s ratio ? 5 0.28. The normal stress acting perpendicular to the weld is approximately:
(A) 39 MPa
(B) 48 MPa
(C) 78 MPa
(D) 84 MPa
In a double-slit experiment, the slit separation is 2.0 mm, and two wavelengths, 750 nm and 900 nm, illuminate the slits
A screen is placed 2.0 m from the slits. At what distance from the central maximum on the screen will a bright fringe from one pattern first coincide with a bright fringe from the other? A) 1.5 mm B) 3.0 mm C) 4.5 mm D) 6.0 mm
A force is a vector quantity because it has both
A) magnitude and direction. B) mass and velocity. C) action and reaction counterparts. D) speed and direction.
A lens that is thicker at the center than at the edge is called a(n) ______________ lens
Fill in the blank(s) with correct word