Which of the following type(s) of materials is(are) repelled when a magnet is brought near by?
a. paramagnetic
b. diamagnetic
c. ferromagnetic
d. paramagnetic and ferromagnetic
e. paramagnetic, ferromagnetic, and diamagnetic
B
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Why does light come in different colors?
a) differences in the wavelength b) it travels at different speeds c) warping of space it travels through d) differences in intensity of radiation e) bending of light in space
Which graph shows an object moving with a constant non-zero velocity?
GRAPH A
GRAPH B
GRAPH C
Which statement about the Local Group is false?
A) Most of its members are dwarf elliptical and irregular galaxies. B) It contains about 55 member galaxies. C) Its notable spirals include the Milky Way, M31, and M33. D) It contains the large radio galaxy Centaurus A. E) It is about three million light-years across.
A 10-kg object is hanging by a very light wire in an elevator that is traveling upward. The force that the wire exerts on the object is measured to be 75 N. What are the magnitude and direction of the acceleration of the elevator?
What will be an ideal response?