The magnetic field lines about a straight current-carrying wire are
A) circular.
B) radial.
C) elliptical.
D) spiral.
Answer: A
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A car needs to generate in order to maintain a constant velocity of on a flat road. What is the magnitude of the total resistive force acting on the car (due to friction, air resistance, etc.)? (1 hp = 746 W)
A) 2.05 × 103 N B) 2.75 N C) 1.03 × 103 N D) 2.87 × 103 N
Newton's modification of Kepler's Third Law lets us measure the mass of the Sun
Indicate whether the statement is true or false
What type of exoplanet observation allows unambiguous determination of the exoplanet's mass and radius? Can this be done with most exoplanets?
What will be an ideal response?
What is the maximum kinetic energy (in eV) of a photoelectron when a surface, whose work function is 5.0 eV, is illuminated by photons whose wavelength is 400 nm?
a. 3.1 b. -1.9 c. 1.9 d. 0 e. 1.2