Which of these is true about the seasons of Uranus?
A) With a tilt of 29 degrees, they are not that different from our solstices and equinoxes.
B) Its strange tilt produces extreme seasonal variations, especially at the poles.
C) At the Uranian equator, the Sun would pass overhead every sixteen hours.
D) At the Uranian pole the Sun sets every 16 hours during the summer and winter.
E) There are no seasons at the poles.
B
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As an interstellar cloud of hydrogen gas shrinks in size, its temperature increases
A) because thermal energy is converted to radiative energy. B) because kinetic energy is converted to radiative energy. C) because gravitational potential energy is converted to thermal energy.
Conductor A has 11 electrons and conductor B has 32 electrons. The number of valence or conduction electrons in A and B is given as
A) A:2 and B:4. B) A:4 and B:2. C) A:4 and B:4. D) A:1 and B:4. E) A:4 and B:1.
The magnitude of a displacement is ______________ the magnitude of the distance traveled
a. always unequal to b. less than or equal to c. always equal to d. greater than or equal to e. none of these; the two cannot be compared.
A stream of electrons passes through a velocity filter where the crossed magnetic and electric fields are 0.020 T and 5.00 × 10^4 V/m, respectively. Find the kinetic energy (in electron volts) of the electrons passing through the filter. [1 eV = 1.60 × 10^?19 J]