If the momentum of an electron is 1.95 × 10-27 kg ? m/s,
what is its de Broglie wavelength? (h = 6.626 × 10-34 J ? s)
A) 340 nm
B) 210 nm
C) 170 nm
D) 420 nm
E) 520 nm
A
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A 1.65 nC charge experiences an acceleration of 
in an electric field. What is the magnitude of the electric field?
A. 
B. 
C. 14.9 N/C
D. 
E. there isn't enough information in the problem to solve this
Harlow Shapley used observations of globular clusters to determine the position of the center of the galaxy
a. True b. False Indicate whether the statement is true or false
The clouds of Jupiter are primarily composed of liquid hydrogen
Indicate whether the statement is true or false
One gram of water is heated from 0°C to 100°C at a constant pressure of 1 atm. Determine the approximate change in internal energy (in cal) of the water.
A. 160 B. 130 C. 100 D. 180 E. 50