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A circle has a radius of 30 cm. Determine the length of the arc subtended by an angle of 60∘ at the center of the circle.
Depending on the radiating properties, a body will be opaque when
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As per Kirchoffs law, the ratio of the total radiating power to the absorptivity of a body depends on the
At which temperature would the earth be radiating energy at the greatest rate or intensity?
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
If one angle of a triangle is three times a second angle and the third is 20 degrees more than the second angle, the second angle, in degrees, is
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
Identify the sentence in which the word element (s) refers to 'suitable or favourable environment. (1) There is an element of truth in your story. (2) Water is composed of elements of hydrogen and oxygen. (3) I feel out of my elements in political discussions. (4) Water is a natural element for fish
The __________ element must reference either an ‘altGlyphDef’ element or a ‘glyph’ element.