_________strengthening is when small hard particles are added to a ductile metal.
Fill in the blank(s) with the appropriate word(s).
Dispersion
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If I fire a cannonball from the top of a mountain, traveling parallel to the Earth's surface at 14,000 miles per hour (6.26km/s), it travels a great distance before falling to Earth. If instead, I fire it at 16,000 miles per hour (7.15km/s) it:
A) travels completely around the Earth before returning to the mountaintop B) drops to Earth immediately C) travels the whole way to the Moon, orbits it once, then comes back D) travels a much smaller distance before falling to Earth E) travels exactly the same distance before falling to Earth
Energy and Mass: The energy released by a certain reaction is enough to totally evaporate 125 kg of water at its boiling point. How much mass was lost during this reaction? (LF = 334,000 J/kg for water, c = 3.00 × 108 m/s)
Fill in the blank(s) with the appropriate word(s).
If a = 3.0 mm, b = 4.0 mm, Q1 = ?60 nC, Q2 = 80 nC, and q = 30 nC in the figure, what is the magnitude of the electric force on q?
A. 1.4 N B. 1.0 N C. 1.7 N D. 2.0 N E. 0.50 N
A charge of 5.0 pC is distributed uniformly on a spherical surface (radius = 2.0 cm), and a second charge of ?2.0 pC is distributed uniformly on a concentric spherical surface (radius = 4.0 cm). Determine the magnitude of the electric field 3.0 cm from the center of the two surfaces.
A. 30 N/C B. 50 N/C C. 40 N/C D. 20 N/C E. 70 N/C