Given that a vector extends from the origin to (-5.0 cm, 8.0 cm), find the direction of the vector from the positive x-axis.
A. 32
B. 58
C. 148
D. 122
D. 122
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If water had a lower specific heat capacity, would ponds and lakes be more or less likely to freeze in winter?
What will be an ideal response?
Explain how planetary nebulae and white dwarfs are related to mass loss from an aging medium-mass star
What will be an ideal response?
In an astronomical telescope the secondary mirror is
a. concave. b. convex. c. spherical. d. plane.
Which statement below regarding the First Law of Thermodynamics is most correct?
a. A system can do work externally only if its internal energy decreases. b. The internal energy of a system that interacts with its environment must change. c. No matter what other interactions take place, the internal energy must change if a system undergoes a heat transfer. d. The only changes that can occur in the internal energy of a system are those produced by non-mechanical forces. e. The internal energy of a system cannot change if the heat transferred to the system is equal to the work done by the system.