When water at 4°C is heated it expands. If it is instead cooled it will
A) contracts.
B) also expand.
C) neither contracts nor expands.
Answer: B
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An optic fiber is made of clear plastic with index of refraction of 1.50, surrounded by air. For what angles of incidence ? will light remain within the plastic fiber?
A) ? ? 21.1° B) ? < 38.3° C) ? > 38.3° D) ? < 41.8° E) ? > 41.8°
Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C A 1 kg block of ice is removed from a freezer where its temperature was –10°C. The amount of heat absorbed by the ice as it warms to 0°C is 20,000 J
Indicate whether the statement is true or false
In the experiment for interference using the concept of air wedge, the point where the glass plates touch in an air wedge is a dark fringe
Indicate whether the statement is true or false