Early telescopic observers thought the lunar mare were seas of water; today we know they are not liquid water but molten basalt, long ago frozen out
Indicate whether the statement is true or false
TRUE
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Two optically flat glass plates, 16.0 cm long, are in contact at one end and separated by 0.0200 mm at the other end
The space between the plates is occupied by oil with index of refraction 1.45. The index of refraction of the glass plates is 1.55. The plates are illuminated at normal incidence with monochromatic light, and fringes are observed. If the dark fringes are spaced 2.00 mm apart, what is the wavelength of the monochromatic light? A) 525 nm B) 475 nm C) 675 nm D) 425 nm E) 725 nm
Potential: After a proton with an initial speed of 1.50 × 105 m/s has increased its speed by accelerating through a potential difference of 0.100 kV, what is its final speed? (e = 1.60 × 10-19 C , mproton = 1.67 × 10-27 kg)
A. 4.56 × 105 m/s B. 2.04 × 105 m/s C. 3.55 × 105 m/s D. 8.80 × 105 m/s E. 1.55 × 106 m/s
A particle physicist observes cosmic rays creating a new particle high in the atmosphere, and the speed of this particle is measured at 99.7% the speed of light
It is unstable, and is observed to decay in an average 37.0 ?s. If this particle were at rest in the laboratory, what would be its average lifetime? A) 2.9 µs B) 18 µs C) 5.3 µs D) 12 µs E) 4.3 µs
When five equal positive charges are uniformly spaced along the x-axis, the force on the next to last charge on the right is directed
A) to the right. B) possibly in the negative y-direction. C) zero. D) possibly in the positive y-direction. E) to the left.