Consider a camera with a 20. cm diameter lens recording images at 600. nm wavelength
(a) What is the angular resolution limit?
(b) What is the minimum sized features which can be resolved on Mars (at a distance of 9.0 × 107 km) with this lens?
(a) 3.7 × 10-6 radian = 0.75 arc sec
(b) 3.3 × 102 km
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If the diameter of a wire increases, its resistance __________
Fill in the blank(s) with correct word
The idea of uniformitarianism suggests that
A) the natural laws that operate today are different than those that have operated in the past. B) sediments are laid down layer upon layer with younger layers always on the top. C) the processes and natural laws that operate today have been valid throughout geologic time. D) all rocks layers are originally uniform.
Two metal rods, one silver and the other copper, are both attached to a steam chamber as shown in the figure, with a temperature of 100°C, at one end, and an ice water bath, with a temperature of 0°C,
What will be an ideal response?
Two protons are fired toward each other in a particle accelerator, with only the electrostatic force acting. Which of the following statements must be true about them as they move closer together? (There could be more than one correct choice.)
A) Their kinetic energy keeps decreasing. B) Their electric potential energy keeps decreasing. C) Their electric potential energy keeps increasing. D) Their kinetic energy keeps increasing. E) Their acceleration keeps decreasing.