How many protons does Radon have?
a. 6
b. 101
c. 31
d. 103
e. 86
e
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Multiple-Object Accelerating Systems: Three boxes rest side-by-side on a smooth, horizontal floor. Their masses are 5.0 kg, 3.0 kg, and 2.0 kg, with the 3.0-kg mass in the center. A force of 50 N pushes on the 5.0-kg box, which pushes against the other two boxes. What magnitude force does the 5.0-kg box exert on the 3.0-kg box?
A. 0 N B. 10 N C. 25 N D. 40 N E. 50 N
Single-Slit Diffraction: A beam of light of wavelength 600 nm passes through a slit that is 3.1 × 10-5 m wide, and then goes on to a screen that is 2.2 m from the slit. On the screen, how far is the second dark fringe from the center of the diffraction pattern?
A. 3.9 cm B. 4.2 cm C. 6.3 cm D. 2.1 cm E. 8.5 cm
The celestial coordinates of the Sun change from day to day
Indicate whether the statement is true or false
The tail of a comet is primarily caused by
A) radiation pressure. B) electromagnetic induction. C) Coulomb repulsion. D) eddy currents. E) nuclear magnetism.