Charge in an Electric Field: An electron is initially moving to the right when it enters a uniform electric field directed upwards, as shown in the figure. Which trajectory (X, Y, Z, or W) will the electron follow in the field?

A. trajectory W 
B. trajectory X 
C. trajectory Y 
D. trajectory Z 


Answer: D

Physics & Space Science

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An empty spice bottle has an inner volume of 1.31 × 10^?4 m3 . It has a mass of 112 g when filled with air, and it displaces 1.63 × 10^?4 m3 of water when fully submerged. What fraction of the total volume of the bottle will be beneath the surface when it is placed in a tank of water?

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We know that giant stars are larger in diameter than the Sun because

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Betelgeuse is a star in the constellation Orion. It radiates heat at the rate of 3.00 × 1030 W and has a surface temperature of 3000 K

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Astronomers conclude that quasars must come from the earliest phases of the Universe because they ____

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Physics & Space Science