Which of the following stars has the hottest surface temperature?
A) the blue star
B) the orange star
C) the yellow star
D) the red star
A) the blue star
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Just as water flows from a region of high pressure to a region of low pressure, electric charge flows from a region of
A) high electric pressure to a region of low electric pressure. B) high potential energy to a region of low potential energy. C) deep to shallow regions. D) all of the above
In a two-body collision, if the momentum of the system is conserved, then which of the following best describes the kinetic energy after the collision?
a. must be less b. must also be conserved c. may also be conserved d. is doubled in value
The optimal exercise frequency for improving one's health related cardiorespiratory fitness level is three to five days per week.
Indicate whether the statement is true or false.
A spherical conductor (radius = 1.0 cm) with a charge of 2.0 pC is within a concentric hollow spherical conductor (inner radius = 3.0 cm, outer radius = 4.0 cm) which has a total charge of -3.0 pC. What is the magnitude of the electric field 2.0 cm from the center of these conductors?
a. 23 N/C b. zero c. 45 N/C d. 90 N/C e. 110 N/C