A radar pulse returns 3.0 × 10^-4 s after it was sent out and reflected by an object. What is the separation distance of the radar source and the object?
4.5 × 10^4 m
Physics & Space Science
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A person runs up a long flight of stairs in 10 seconds. If the person's weight is 600 N and the vertical height of the stairs is 20 meters, what is the person's power output?
Physics & Space Science
Heat Engines: A heat engine with an efficiency of 30% performs 2500 J of work. How much heat is discharged to the lower temperature reservoir?
A. 5800 J B. 8300 J C. 750 J D. 1400 J E. 7100 J
Physics & Space Science
The fast rotation of neutron stars is a consequence of the law of conservation of angular momentum.
Answer the following statement true (T) or false (F)
Physics & Space Science
A force-carrying particle is a(n)
a. lepton b. baryon c. meson d. intermediate (or gauge) boson e. hadron
Physics & Space Science