Author Question: Suppose that an aluminum wire were to be strung out in a loop that just fits snugly around the ... (Read 38 times)

theo · **on:** Jul 29, 2018

Suppose that an aluminum wire were to be strung out in a loop that just fits snugly around the equator (assuming a perfectly spherical Earth with a radius of 6.37 106 m).

If the temperature of the wire is increased by 0.50C, and the increase in length is distributed equally through the entire length, how far off the ground will the wire loop be? The coefficient of linear expansion of aluminum is 24 10-6 K-1.
A) 7.6 mm
B) 76 mm
C) 76 cm
D) 76 m
E) 760 m

Question 2

A 4.00-kg block slides down a frictionless inclined plane with an acceleration 3.00 m/s2. What is the angle of the incline above horizontal?

A) 35.3
B) 45.2
C) 17.8
D) 23.6
E) 53.7