A nonconducting sphere of radius 10 cm is charged uniformly with a density of 100 nC/m3 . What is the magnitude of the potential difference between the center and a point 4.0 cm away?
a. 12 V
b. 6.8 V
c. 3.0 V
d. 4.7 V
e. 2.2 V
c
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The Algol paradox is explained by considering
a. the degenerate nature of the hydrogen on the surface of the white dwarf. b. synchrotron radiation c. the rate of expansion of the shock wave inside the supernova. d. the rotation rate of a neutron star. e. mass transfer between the two stars in a binary system.
A heat engine is any device that changes mechanical work into thermal energy
Indicate whether the statement is true or false
A container is filled with a mixture of helium and oxygen gases. A thermometer in the container indicates that the temperature is 22.°C. Which gas molecules have the greater average speed?
A) The oxygen molecules do because they are diatomic. B) The helium molecules do because they are monatomic. C) The oxygen molecules do because they are more massive. D) It is the same for both because the temperatures are the same. E) The helium molecules do because they are less massive.
For a quantity of ideal gas, which of the following is constant?
a. PTV c. PT/V b. P/TV d. PV/T