After an electron has been accelerated through a potential difference of 0.15 kV, what is its de Broglie wavelength? (e = 1.60 10-19 C, melectron = 9.11 10-31 kg, h = 6.626 10-34 J s)
A) 0.10 nm
B) 1.0 nm
C) 1.0 mm
D) 1.0 cm
Question 2
A cubical box, 5.00 cm on each side, is immersed in a fluid. The gauge pressure at the top surface of the box is 594 Pa and the gauge pressure on the bottom surface is 1133 Pa. What is the density of the fluid?
A) 1100 kg/m3
B) 12,000 kg/m3
C) 2340 kg/m3
D) 1220 kg/m3
E) 1000 kg/m3
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