Melting and freezing are
A) changes of phase.
B) opposite processes.
C) both of these
D) neither of these
Answer: C
You might also like to view...
The shorter the wavelength of light, the higher its frequency
Indicate whether the statement is true or false
By using a compass to measure the magnetic field direction at various points adjacent to a long straight wire, you can show that the wire's magnetic field lines are
a. straight lines in space that go from one magnetic charge to another. b. straight lines in space that are parallel to the wire. c. straight lines in space that are perpendicular to the wire. d. circles that have their centers on the wire and lie in planes perpendicular to the wire. e. circles that have the wire lying along a diameter of the circle.
Visible light from a distant star can be spread into a spectrum by using a glass prism or
A) a diffraction grating. B) adaptive optics. C) a telescope. D) a flat glass mirror.
A microscope has an objective lens of focal length 1.40 mm and an eyepiece of focal length 20.00 mm
It is adjusted for minimum eyestrain for persons with a near point of 25.0 cm. A blood sample is placed 1.50 mm from the objective. How far apart are the lenses? A) 20 mm B) 21 mm C) 23 mm D) 41 mm