Determine the missing product X in the reaction: n + U ? X + 2( e)
What will be an ideal response?
Pu
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The energy of sound in air eventually becomes
A) increased internal energy in the air. B) weaker and weaker until it disappears. C) cancelled by destructive interference. D) all of the above E) none of the above
A natural gas pipeline with a diameter 0.250 m delivers 1.55 cubic meters of gas per second. What is the flow speed of the gas in the pipeline?
What will be an ideal response?
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115.°F. Six months later the temperature has dropped to -2.°F
How much space now exists between each rail? [ linear expansion coef. for steel is 12. × 10-6 C°-1]
A 40.0-kg crate is being raised by means of a rope. Its upward acceleration is 2.00 m/s2. What is the force exerted by the rope on the crate?
A) 80.0 N B) 312 N C) 392 N D) 472 N E) 552 N