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Questions in physics

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] There are no auroras on Venus because it A. Lacks atmospheric oxygen B. Has very high pressure C. Lacks a magnetic field D. Has a very high surface temperature

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Which factors affect the gravitational force between objects? Check all that apply. A. difference in speed of objects B. direction of movement of objects C. distance between objects D. masses of the objects E. volumes of the objects

[Answered] The frequency of a wave does not change as it passes from one medium to another. What will most likely happen if a light wave moves from the air into a solid? A. The wavelength of the light wave will increase. B. The speed of the light wave will decrease. C. The wavelength of the light wave will remain the same. D. The speed of the light wave will remain the same.

[Answered] Kelsha makes a table to compare plasmas and solids. | & Plasma & Solid | | Kinetic energy | X | | Density | | Y | Which labels belong in the cells marked [tex]$X$[/tex] and [tex]$Y$[/tex]? A. X: High, Y: High B. X: High, Y: Low C. X: Low, Y: High D. X: Low, Y: Low

[Answered] Suppose for an unexplained reason a star near Earth started shrinking. At what stage is the gravitational force between Earth and the star the greatest? | Stage | Mass of Earth (kg) | Mass of Star (kg) | |---|---|---| | 1 | 5.97 x 10^{24} | 1.8 x 10^{30} | | 2 | 5.97 x 10^{24} | 2.7 x 10^{27} | | 3 | 5.97 x 10^{24} | 5.0 x 10^{25} | | 4 | 5.97 x 10^{24} | 4.5 x 10^{23} | A. Stage 1 B. Stage 2 C. Stage 3 D. Stage 4

[Answered] If it takes a planet [tex]$2.8 \times 10^8 s$[/tex] to orbit a star with a mass of [tex]$6.2 \times 10^{30} kg$[/tex], what is the average distance between the planet and the star? A. [tex]$1.43 \times 10^9 m$[/tex] B. [tex]$9.36 \times 10^{11} m$[/tex] C. [tex]$5.42 \times 10^{13} m$[/tex] D. [tex]$9.06 \times 10^{17} m$[/tex]

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?