The Concorde's exterior is made of aluminum, which has a coefficient of linear expansion of 24 × 10-6 K-1. At 15°C, the Concorde measures 62.1 m in length
When the plane is in flight, friction with the air increases the temperature of the exterior skin to 200°C. What is the change in the length of the outer skin of the Concorde? A) 20 cm
B) 24 cm
C) 28 cm
D) 32 cm
E) 36 cm
C
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Helium fusion does not begin until the star has entered the giant region of the H-R diagram
a. True b. False Indicate whether the statement is true or false
What is the process in which a nucleus of an atom breaks up, emitting subatomic particles and/or energy?
a. radioactive decay b. radioactive isotyping c. unstable atomic nucleus d. electron release e. free radical release
An empty coal-car (mass 20,000.kg) of a train coasts along at 10.m/s. An unfortunate 3000. kg elephant falls from a bridge and drops vertically into the car. Determine the speed of the car immediately after the elephant is added to its contents
What will be an ideal response?
An ice skater spins at 3.5 rev/s with his arms are extended. He draws his arms in and spins at 8.3 rev/s. By what factor does his moment of inertia change in the process?
a. 2.4 c. 0.42 b. 0.58 d. 0.12