An object of mass 20 kg is raised vertically through a distance of 8.0 m above ground level. Using g = 10 m/s2 what is the potential energy of this object at this position?
A) 1.6 J
B) 16 J
C) 160 J
D) 1600 J
E) 16000 J
D
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X-ray and ?-ray NDT detect differences in _________in materials.
Fill in the blank(s) with the appropriate word(s).
An ideal gas at pressure, volume, and temperature, P0, V0, and T0, respectively, is heated to point A, allowed to expand to point B also at A’s temperature 2T0, and then returned to the original condition. The internal energy increases by 3P0V0/2 going from point
T0 to point A. How much heat entered the gas from point T0 to point A?
a.
0
b.
P0V0/2
c.
3P0V0/2
d.
5P0V0/2
For a plane wave approaching an obstacle with a rectangular opening, diffraction becomes important in which of the following circumstances?
A. the beam is coherent B. one or more dimensions of the rectangular opening is near the wavelength of the source C. both dimensions of the rectangular opening are larger than the wavelength of the source D. only if the opening is circular
Discuss the mass, temperature, color and size of an M3V star, compared to the Sun
What will be an ideal response?