Refracting Telescope: You have available lenses of focal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16 cm. If you could use any two of these lenses to build a telescope, what is the lens separation for the telescope to provide the maximum magnification for comfortable viewing of a planet?
A. 10.0 cm
B. 12.0 cm
C. 18.0 cm
D. 24.0 cm
Answer: C
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Charge of a uniform density (8.0 nC/m2) is distributed over the entire xy plane. A charge of uniform density (5.0 nC/m2) is distributed over the parallel plane defined by z = 2.0 m. Determine the magnitude of the electric field for any point with z = 1.0 m.
A. 0.45 kN/C B. 0.17 kN/C C. 0.28 kN/C D. 0.73 kN/C E. 0.62 kN/C
What are the two primary energy transfer processes?
A. Work and heat B. Nuclear and heat C. Work and nuclear D. Heat and light E. Energy cannot be transferred
Most of the oxygen in living cells is found in
A) carbohydrates B) water C) lipids D) proteins
A mechanic is examining the wheel of a bicycle to adjust the brake. With the bicycle off the ground, he manually rotates the wheel until it reaches an angular speed of 12.0 rad/s and then allows it to coast to a stop
If the wheel has a moment of inertia of 0.100 kg ? m2, and the wheel slows uniformly to a stop in 160 s, what is the magnitude of the retarding torque? A) 1.00 N ? m B) 0.00750 N ? m C) 0.0787 N ? m D) 1.33 N ? m E) 1.67 N ? m