The magnetic field lines about a straight current-carrying wire are

A) circular.
B) radial.
C) elliptical.
D) spiral.


Answer: A

Physics & Space Science

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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

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Newton's modification of Kepler's Third Law lets us measure the mass of the Sun

Indicate whether the statement is true or false

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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?

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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

Physics & Space Science