If 1.0 m3 of concrete weighs 5 × 10^4 N, what is the height of the tallest cylindrical concrete pillar that will not collapse under its own weight? (The compression strength of concrete is 1.7 × 10^7 N/m2.)
340 m
Physics & Space Science
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The original cloud from which the sun and planets formed had a composition rich in hydrogen and helium
Indicate whether the statement is true or false
Physics & Space Science
The rotation curve of the galaxy provides evidence for the existence of the ____________________ which extends beyond the halo of the galaxy
Fill in the blank(s) with correct word
Physics & Space Science
The sedimentary rock known as ______________ consists of rounded pebbles cemented together by silica, calcium carbonate, or iron oxide
Fill in the blank(s) with correct word
Physics & Space Science
Power: The circuit power factor of an RC circuit is 0.620. The rms value of the ac voltage applied to this signal is 120 V and the impedance is 200 ?. What is the average power of this circuit?
A. 44.6 W B. 89.2 W C. 60.0 W D. 0.620 W E. 124 W
Physics & Space Science