Ferromagnetic materials lose their ability to form permanent magnets if
A)
aligned north and south.
B)
heated above their Curie temperature.
C)
cooled below their Curie temperature.
D)
the electrons lose their spin magnetic moment.
E)
aligned east and west.
B
You might also like to view...
Specific Heat: In a flask, 114.0 g of water is heated using 67.0 W of power, with perfect efficiency. How long will it take to raise the temperature of the water from 15°C to 25°C? The specific heat of water is 4186 J/kg ? K.
A. 71 s B. 4.1 s C. 17 s D. 320,000 s
When using an eyepiece of focal length f, the Yerkes refracting telescope gives a magnification of 800 . What focal length eyepiece would yield a magnification of 500?
a. (8/5)2f b. (5/8)f c. (8/5)f d. (5/8)2f
Total internal reflection
A. Accounts for the brilliance of cut diamonds. B. Allows light to travel in a curved path inside an optic fiber. C. All of these are true. D. Occurs when light strikes an interface at greater than the critical angle.
A rising parcel of air continues to rise as long as
A) the wind is blowing. B) it is warmer and less dense than the surrounding air. C) the temperature is inverted. D) it is cooler and denser than the surrounding air.