When a drag strip vehicle reaches a velocity of 65.0 m/s, it begins a negative acceleration by releasing a drag chute and applying its brakes. While reducing its velocity back to zero, its acceleration along a straight-line path is a constant ?7.10 m/s2 . What displacement does it undergo during this deceleration period?
a. 595 m
b. 4.58 m
c. 2 110 m
d. 298 m
e. 9.15 m
d
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Based on the given right ascensions and declinations, which of the following stars lies closest to the celestial equator on the celestial sphere?
A) Sirius: RA = 6hr 45m, dec = -16°42' B) Canopus: RA = 6hr 24m, dec = -52°41' C) Alpha Centauri: RA = 14hr 40m, dec = -60°50' D) Arcturus: RA = 14hr 16m, dec = +19°11' E) Vega: RA = 18hr 37m, dec = +38°47'
Why does the useful resolving power of a ground-based telescope not match its theoretical value?
A. The atmosphere blurs the image, decreasing the resolving power. B. Mirrors can't be built accurately enough. C. Mirrors cannot collect enough light to reach their theoretical expectations. D. The theoretical value can only be reached when there is a Full Moon.
A child on a playground swings through a total of 32 degrees. If the displacement is equal on each side of the equilibrium position, what is the amplitude of this vibration?
a. 32 b. 16 c. 64
When an electron is in a magnetic field, different spin states associated with the electron's magnetic moment will occur. What are these states called?
a. up, down c. clockwise, counterclockwise b. plus, minus d. north, south