____ is a mineral made of oxidized hydrogen
Fill in the blank(s) with the appropriate word(s).
Ans: ice
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Three identical particles labeled A, B, and C enter a region of space where the magnetic field points away from the viewer perpendicular to the plane of the paper in the drawing in the next column. The particles’ velocities have the same magnitude and all lie in the plane of the paper, but they have the different directions shown. Which particle experiences the largest magnetic force? Answer A, B, or C, or choose from the answers below.
A.A
B.B
C.C
D. Both A and C.
E. The force magnitude has the same nonzero magnitude for all three particles.
F. The magnetic force on all three particles is zero.
A CD has a diameter of 12.0 cm. If the CD starts from rest and has a constant angular acceleration of 0.600 
then the total acceleration of a point 3.00 cm from the center of the CD after 1.30 sec is
A. 0.0256 
B. 0.0306
C. 0.0415
D. 0.0472
E. 0.0502
A straight wire is carrying a current of 2.0 A. It is placed at an angle of 60° with respect to a magnetic field of strength 0.20 T. If the wire experiences a force of 0.40 N, what is the length of the wire?
A) 1.8 m B) 1.6 m C) 1.2 m D) 1.0 m E) 1.4 m
Which of the following statements is true?
A. All the photons of the Lyman series are in the ultraviolet. B. Some of the photons of the Lyman series are in the visible. C. Some of the photons of the Lyman series are in the infrared. D. All of the Balmer series are in the visible. E. All of these statements are false.