A A rod of length 2.2m and radius • 36 cm Carries a change of 3.8x102 spread uniformly over its surface than find value of Electric field near mid point of rod at a point on its surface!
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A A rod of length 2.2m and radius • 36 cm Carries a change of 3.8x102 spread uniformly over its surface than find value of Electric field near mid point of rod at a point on its surface!
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Answer:
Label as a physical or chemical change:
(a) perfume evaporating on your skin - physical
(b) butter melting - physical
(c) wood rotting - chemical
(d) charcoal heating a grill - see below
(e) autumn leaves changing color - chemical
(f) a hot glass cracking when placed in cold water - physical
(g) melting copper metal - physical [see (b) above]
(h) burning sugar - chemical
(i) mixing sugar in water - physical
(j) digesting food - chemical
Part (d) of this question can be understood two ways: is it asking about the charcoal producing the heat or about the metal grill getting hot? The metal grill getting hot is a physical change, the charcoal reacting with oxygen (which produces the heat) is a chemical change.