Water circulates in a thermosiphon, hot water system because ________
a. a pump is used
b. gravity causes water to flow from the top of the collector to the bottom
c. hot water is less dense than cold water
d. solar energy is used to run the circulating pump
c
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A charged particle moves with its velocity perpendicular to a magnetic field. The field acts to change the particle's
A) mass. B) magnitude of momentum. C) velocity. D) energy. E) charge.
A student adds two displacement vectors that have the magnitudes of 12.0 m and 5.0 m. What is the range of possible answers for the magnitude of the resultant vector?
What will be an ideal response?
When fast-moving water molecules collide they tend to
A) rebound without sticking. B) stick. C) both of these D) neither of these
A compressed gas with a total mass of is stored in a spherical container having a radius of 0.521 m. What is the density of the compressed gas?
A) 181 kg/m3 B) 110 kg/m3 C) 134 kg/m3 D) 161 kg/m3