This graph plots planetary mass on the horizontal axis and planetary radius on the vertical axis. Which of the four points marked by one of the bold numbers 1 through 4 represents a planet with the greatest mass?
A) Point 1
B) Point 2
C) Point 3
D) Point 4
B) Point 2
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A wrench is placed at 30 cm in front of a diverging lens with a focal length of magnitude 10 cm. What is the magnification of the wrench?
A) 4.0 B) 0.67 C) -0.67 D) -0.25 E) 0.25
If the frequency of a given wave is decreased by a factor of four, how will its wavelength change?
A. The wavelength will increase by a factor of four. B. The wavelength will remain unchanged. C. The wavelength will decrease by a factor of four. D. The change in wavelength is determined by the medium through which the wave is traveling.
A photon is a particle with positive charge
Indicate whether the statement is true or false
A baseball is struck by a bat. While the ball is in the air, what objects exert forces on the ball?
1.Earth 2.Bat 3.Air 4.Bat, Air 5.Earth, Bat 6.Earth, Air 7.Earth, Bat, Air 8.There are no forces on the ball. 9.The answer depends on whether the ball is going up, going down, or at its highest point.