Properties of matter questions | form five Physics
(5624) Question Category: Short answers Briefly explain the following observations as applied to strengths of materials:
Answer / Solution UNSOLVED |
(5625) Question Category: Mathematical Calculation A composite wire of diameter 1 cm consists of copper and steel wires of lengths 2.2m and 2m respectively. Total extension of the wire when stretched by a force is 1.2mm. Calculate the force, given that Young`s modulus for copper is 1.1x1011 Pa and for steel is 2x1011 Pa. Answer / Solution UNSOLVED |
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(5626) Question Category: Short answers What do you understand by the following terms?
Answer / Solution UNSOLVED |
(5627) Question Category: Mathematical Calculation Two rods of different materials but of equal cross-sections and lengths 1.0m each are joined to make a rod of length 2.0m. The metal of one rod has coefficient of linear thermal expansion of 10-5/ oC and Young`s modulus 3x1010 N/m2. The other metal has the values 2x10-5/ oC and 1010 N/m2 respectively. How much pressure must be applied to the ends of the composite rod to prevent its expansion when the temperature is raised by 100oC? Answer / Solution UNSOLVED |
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(5628) Question Category: Mathematical Calculation A steel rod of length 0.60m and cross-sectional area 2.5x10-5m2 at a temperature of 100oC is clamped so that when it cools was unable to contract. Find the tension in the rod when it has cooled to 20oC. Answer / Solution UNSOLVED |
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