Suppose that a rigid 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 0.50°C, and the increase in length is distributed equally over the entire length, how far off the ground will the wire loop be if it remained centered on the earth? The coefficient of linear expansion of aluminum is 24 × 10-6 K-1.
A) 76 cm B) 760 m C) 76 mm D) 7.6 mm E) 76 m
E
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As a main sequence star evolves off the main sequence, the helium core is contracting while the outer envelope is _______________
Fill in the blank(s) with correct word
A 10,000-kg rocket blasts off from earth with a uniform upward acceleration of 2.00 m/s2 and feels no air resistance. The upward thrust force its engines must provide during this acceleration is closest to
A) 20,000 N. B) 980,000 N. C) 118,000 N. D) 78,000 N.
Gamma Rays are a type of electromagnetic radiation
Indicate whether the statement is true or false
An Olympic skier moving at 19.5 m/s down a 17.0° slope encounters a region of wet snow, of coefficient of friction ?k = 0.740 . How far down the slope does she go before stopping?
a. 56.7 m b. 46.7 m c. 56.1 m d. 36.7 m e. 37.4 m