A point on a wheel of radius 40 cm that is rotating at a constant 5.0 revolutions per second is located 0.20 m from the axis of rotation. What is the acceleration of that point due to the spin of the wheel?
A) 0.050 m/s2
B) 1.4 m/s2
C) 48 m/s2
D) 200 m/s2
E) 0.00 m/s2
D
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___________ have elongated nuclei with spiral structure extending from the ends of the elongations. The Milky Way is a member of this class of galaxy
a. Spiral galaxies b. Barred spiral galaxies c. Elliptical galaxies d. Irregular galaxies e. S0 galaxies
The fact that the life on Earth seems to have appeared quite rapidly suggests that life
A) can arise on most habitable worlds B) can only appear soon after a planet forms C) on any kind of planet is inevitable D) is only possible on Earth-like planets
A particle (charge = +40 ?C) is located on the x axis at the point x = ?20 cm, and a second particle (charge = ?50 ?C) is placed on the x axis at x = +30 cm. What is the magnitude of the total electrostatic force on a third particle (charge = ?4.0 ?C) placed at the origin (x = 0)?
A. 41 N B. 16 N C. 56 N D. 35 N E. 72 N
A satellite orbiting the Earth in a circular orbit at 400 miles from the center of Earth is moved to a distance of 1,200 miles from the center of Earth. The gravitational force between the Earth and satellite changes by a factor of 3
a. True b. False Indicate whether the statement is true or false