The water-ice particles forming Saturn's rings are frozen together into a thin sheet that rotates around Saturn like a solid body
Indicate whether the statement is true or false
FALSE
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A +15-nC point charge is placed on the x axis at x = 1.5 m, and a ?20-nC charge is placed on the y axis at y = ?2.0m. What is the magnitude of the electric field at the origin?
a. 105 N/C b. 15 N/C c. 75 N/C d. 45 N/C e. 60 N/C
The redshifts of the galaxies imply that the Universe is expanding and that we are at the center
Indicate whether the statement is true or false
Why are there two tails to some comets?
A. The "dust tail" is formed by solar radiation pressure. The "gas tail," is pushed out by the solar wind. B. The "gas tail" is formed by solar radiation pressure. The "dust tail," is pushed out by the solar wind. C. Comets contain dense material which is attracted by the Sun's gravity, forming a tail which points toward the Sun. D. The statement is false: comets have only one tail.
A piston compresses a gas, while at the same time heat is lost to the surroundings. The temperature of the gas rises. This is governed by the __________ law of thermodynamics
Fill in the blank(s) with correct word