The coefficient of linear expansion of copper is 17 × 10-6 K-1. A sheet of copper has a round hole with a radius of 3.0 m cut out of it

If the sheet is heated and undergoes a change in temperature of 80 K, what is the change in the radius of the hole? A) It decreases by 4.1 mm.
B) It increases by 4.1 mm.
C) It decreases by 8.2 mm.
D) It increases by 8.2 mm.
E) It does not change.


B

Physics & Space Science

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A long solenoid has a radius of 2.0 cm and has 700 turns/m. If the current in the solenoid is decreasing at the rate of 8.0 A/s, what is the magnitude of the induced electric field at a point 2.5 cm from the axis of the solenoid?

a. 56 mV/m b. 8.8 mV/m c. 88 mV/m d. 69 mV/m e. 44 mV/m

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________________ emit radio energy from areas on either side of the galaxy that are inflated by jets

Fill in the blank(s) with correct word

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The determination of the composition of a material by bombarding it with neutrons and monitoring the emitted radiation is neutron activation analysis

a. True b. False Indicate whether the statement is true or false

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The quantity of work equal to one joule is also equivalent to which of the following?

a. watt c. watt × s b. watt /s d. watt /s2

Physics & Space Science