In a country where the unit of currency is the Passi, kerosene costs 130 Passi per liter, and one dollar buys 227 Passi. What is the cost of kerosene in dollars per gallon? (1.00 gal = 3.79 L)
What will be an ideal response?
$2.17 per gallon
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In the UNS system of material designations, if an alloy designation starts with a “G”, it is a plain-carbon or low-alloy _________.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements is true of reconnection events?
A) They refer to the breaking of identically directed magnetic field lines in a plasma. B) Kinetic and thermal energy in plasmas with low conductivity are converted to magnetic energy. C) Solar flares occur in active regions where oppositely directed magnetic fields meet and cancel each other. D) They generate and release magnetic fields as long-wavelength photons and low-energy electrons.
The Doppler effect states that the motion of any object can
a. shift the wavelength of spectral lines. b. change the speed of light emitted from the object. c. enhance the chemical composition of the object. d. make the object appear hotter. e. make the object appear cooler.
You have discovered a new asteroid, which has a moon in an elliptical orbit around it
From a series of observations, you establish that the closest approach occurs when the moon is 51,000 m from the asteroid, the furthest separation is 102,000 m, and the speed of the moon at the point of closest approach is 7.50 m/s. What is the mass of the asteroid? G = 6.67 x 10-11 N•m2/kg2.A) 4.25 × 1016 kg B) 9.87 × 1016 kg C) 3.22 × 1016 kg D) 2.04 × 1016 kg E) 5.05 × 1016 kg