The SI unit of pressure is __________
Fill in the blank(s) with correct word
N/m2 or pascal
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The observable ________ is a thin layer in which the solar material becomes suddenly much more opaque as we look deeper into the Sun
Fill in the blank(s) with correct word
A monochromatic beam of light of wavelength 600 nm is incident normally on a diffraction grating with a slit spacing of 1.70 × 10-4 cm. What is the angle for the first order maximum?
A) 10.5° B) 12.1° C) 16.4° D) 18.2° E) 20.7°
One of the fundamental principles of stellar evolution is that the more massive a star is
A) the more heavy elements it contains B) the more planets it has around it C) the faster it evolves D) the slower it evolves
Does an electric field exert a force on a straight current-carrying wire? Assume the current is along the x axis and field is in the y direction
1.yes 2.no