All of the following are true. Which of the following is Not a consequence of precession of the Earth's spin axis?
a) the path that the earth orbits in a slightly elliptical
b)which star is called the North Star changes in time
c) the instant of the Vernal equinox occurs 20 minutes earlier each year
a) the path that the earth orbits in a slightly elliptical
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Three different-mass projectiles are launched at different angles of elevation from the top of a building. Each particle has the same initial kinetic energy. Which particle has the greatest kinetic energy just as it impacts with the ground?
a. The one launched at the highest angle of elevation. b. The one with the highest mass. c. The one with the lowest mass. d. They all will have the same kinetic energy on impact.
Let's say that the magnitude of a particle's displacement is 2 m. Which of the following values could represent the distance traveled?
(i) 0 m (ii) 1 m (iii) 2 m (iv) 3 m
1.(iii) and (iv) 2.(ii), (iii), and (iv) 3.(i) and (ii) 4.all of themA cup of water containing an ice cube at 0°C is filled to the brim. The tip of the ice cube sticks out of the surface. As the ice melts, you observe that
A) the cup overflows. B) the water level actually goes down. C) the water level remains the same. D) the cup might overflow but it depends on the actual mass of the ice cube. E) There is not enough information to answer this question.
Saturation and condensation are more likely to occur in
A) warm air than in cool air. B) air with a low relative humidity. C) cool air than in warm air. D) an adiabatic air mass.