With which object would the wave nature of matter be significant?
a. A hard-thrown baseball
b. A speeding truck
c. A moving electron
d. An orbiting planet
c
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As the 21st century began, which of the following is a discovery made by astronomers?
A) The Universe has a center. B) The expansion of the Universe is actually accelerating. C) The Universe has an edge. D) The expansion of the Universe has come to a halt.
Liquid sodium is to be heated from 500 K to 600 K by passing it at a flow rate of 5.0 kg/s through a 5-cm-ID tube whose surface is maintained at 620 K. What length of tube is required?
GIVEN
FIND
The length of tube (L) required
ASSUMPTIONS
Surface temperature is constant and uniform
SKETCH
PROPERTIES AND CONSTANTS
for liquid sodium at the average bulk temperature of 550 K
A solid conducting sphere of 10 cm radius has a net charge of 40 nC. If the potential at infinity is taken as zero, what is the potential at the center of the sphere?
a. 360 mV c. >3.6 × 10^4 V b. 3.6 × 10^3 V d. 36 mV
An atomizer works because of Bernoulli's principle
Indicate whether the statement is true or false