What is partial melting?
What will be an ideal response?
Magma made from only the fraction of minerals that have melted.
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Elementary Particles: Leptons can interact by which of the following forces?
A. strong nuclear force, weak nuclear force, electromagnetic force, gravitation B. strong nuclear force, weak nuclear force, electromagnetic force C. weak nuclear force, electromagnetic force, gravitation D. strong nuclear force, weak nuclear force E. strong nuclear force, electromagnetic force, gravitation
Two long parallel wires 10.0 cm apart carry currents of 3.0 A and 2.9 A in the same direction. Is there any point between the two wires where the magnetic field is zero?
a. yes, midway between the wires b. yes, 4.9 cm from the 3.0-A wire c. yes, 5.1 cm from the 3.0-A wire d. yes, 5.1 cm from the 2.9-A wire e. no.
A monochromatic (single frequency, single wavelength) light ray in air (n = 1) enters a glass prism (n = 1.5). In the glass prism
a. both the frequency and the wavelength are the same as in air b. the frequency is the same, but the wavelength is greater than in air. c. the frequency is the same, but the wavelength is smaller than in air. d. the wavelength is the same, but the frequency is greater than in air. e. the wavelength is the same, but the frequency is smaller than in air.
Consider two parallel wires carrying current in the same direction. Which one of the following statements to true concerning this situation?
a) The two wires will attract each other, even if no external magnetic field is applied to the wires. b) The two wires will repel each other, even if no external magnetic field is applied to the wires. c) The two wires will attract each other, only if an external magnetic field is applied to the wires. d) The two wires will repel each other, only if an external magnetic field is applied to the wires. e) The wires will be neither attracted nor repelled from each other when no external magnetic field is applied to the wires.