Deltas form as
A) periodic flooding clogs stream channels.
B) erosion clogs stream channels.
C) stream gradient decreases.
D) streams enter a standing body of water.
Answer: D
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You obtain a 100. W lightbulb and a 50. W light bulb. Instead of connecting them in the normal way, you devise a circuit that places them in series across normal household voltage. Which statement is correct?
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Whenever the net force on an object is zero, its acceleration
A) may be zero. B) is zero. C) and velocity are the same. D) none of the above
2.0 L of a ideal nitrogen gas (N2 ) are at 0.00°C and 1.0 atm. The ideal gas constant is R = 8.314 J/mol • K = 0.0821 L ? atm/mol ? K, Avogadro's number is 6.022 × 1023 molecules/mol, and the ATOMIC mass of nitrogen is 14 g/mol
(a) Determine the number of moles of N2. (b) How many molecules of N2 are present? (c) What is the mass of this gas?
Determine the amount of energy carried in 2.0 m of a 4.6-mW He-Ne laser beam if the cross-sectional area of the beam is 4.1 × 10^?6 m2
a. 1.4E–10 J b. 4.9E–12 J c. 3.1E–11 J d. 6.1E–8 J e. 1.0E–11 J