What is the resolution limit at 400. nm, due to diffraction, of the Hubble Space Telescope which has an aperture of 2.4 meters?
What will be an ideal response?
2.0 × 10-7 radians = 42. milli-arc-second
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What is the significance of Planck time?
A) Before it, conditions were so extreme that our current understanding of physics is insufficient to predict what might have occurred. B) It is the time at which inflation is thought to have occurred. C) It is the time when the cosmic microwave background was released. D) It is the amount of time required for two protons to fuse to make deuterium.
An electron enters a magnetic field of 0.75 T with a velocity perpendicular to the direction of the field. At what frequency does the electron traverse a circular path? (mel = 9.11 × 10-31 kg, e = 1.60 × 10-19 C)
A) 2.1 × 1010 Hz B) 4.8 × 10-7 Hz C) 2.1 × 1014 Hz D) 4.8 × 10-11 Hz
What is the electric potential at the center of a hollow metal sphere of outside diameter 14. cm which holds a net charge of 3.3 ?C?
What will be an ideal response?
By what factor larger is a 12 inch pizza than a 10 inch pizza?
A. 1.2 B. 1.1 C. 1.4 D. 1.6