Georgia moves an unattached piece of wire back and forth over a magnet. Which best explains what will happen?
A. a current will be induced because the wire moves through a magnetic field.
B. a current will not be induced because the wire moves through a magnetic field.
C. a current will be induced because the wire is not part of a closed circuit.
D. a current will not be induced because the wire is not part of a closed circuit.
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You lay on your back and watch the stars for an entire night. You focus on one star and notice that it does not rise or set, nor does it trace circles in the sky. What is your latitude on Earth? Which star would be at your zenith if you stood up? Which significant feature of the celestial sphere lies along your horizon?
What will be an ideal response?
Compound Microscope: The objective lens and the eyepiece of a microscope have focal lengths of 4.0 mm and 25 mm, respectively. The objective produces a real image 30 times the size of the object, with the final image viewed at infinity. The near point of the microscope user is at 25 cm. What is the distance between the objective lens and the real image that it produces?
A. 116 mm B. 120 mm C. 124 mm D. 128 mm E. 132 mm
In the BCS theory of superconductivity of metals, at temperatures below the critical temperature electrons are coupled into _________pairs through interactions with the crystal lattice.
Fill in the blank(s) with the appropriate word(s).
Find the orbital speed of an ice cube in the rings of Saturn. The mass of Saturn is 5.68 x 1026 kg, and use an orbital radius of 1.00 x 105 km. (G = 6.67 × 10-11 N ? m2/kg2 )
A) 19.5 km/s B) 27.5 km/s C) 13.8 km/s D) 9.40 km/s